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AWS Certified Security Specialty SCS-C02 (SCS-C02) — Questions 826–900

1738 questions total · 24pages · All types, answers revealed

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826
Multi-Selecteasy

Which TWO of the following are valid methods to secure data at rest in Amazon S3? (Choose two.)

Select 2 answers
A.Use S3 server-side encryption with customer-provided keys (SSE-C).
B.Enable S3 Object Lock.
C.Use client-side encryption before uploading objects to S3.
D.Enable S3 Transfer Acceleration.
E.Use S3 server-side encryption with S3-managed keys (SSE-S3).
AnswersA, E

SSE-C encrypts data at rest in S3 using keys provided by the customer.

Why this answer

The correct answers are A and C. Option A is correct because S3 SSE-S3 uses server-side encryption with Amazon S3-managed keys. Option C is correct because S3 SSE-C uses customer-provided encryption keys.

Option B is wrong because client-side encryption is done before uploading, but it is not a server-side encryption method; however, it is a valid method to secure data at rest, but the question asks for methods to secure data at rest in S3, and client-side encryption is done before data reaches S3. Option D is wrong because S3 Transfer Acceleration is for faster uploads, not encryption. Option E is wrong because S3 Object Lock is for write-once-read-many (WORM) protection, not encryption.

Full explanation →
827
Multi-Selectmedium

A security engineer is designing a VPC with public and private subnets. The VPC will host web servers in public subnets and database servers in private subnets. The web servers need to send traffic to the database servers, and the database servers must not have direct internet access. Which TWO configurations should the engineer implement?

Select 2 answers
A.Use network ACLs to block all inbound traffic to the private subnets.
B.Configure security group rules to allow inbound traffic from the web server security group to the database security group.
C.Do not add a route to an internet gateway in the route table for the private subnets.
D.Attach an internet gateway to the VPC and route the private subnets to it.
E.Add a NAT gateway in the public subnet and route the private subnets to it.
AnswersB, C

This allows targeted traffic between web and database servers.

Why this answer

Option A is correct because security group rules can allow traffic between web and database servers based on the security group ID. Option D is correct because a NAT gateway is not needed for private subnets that don't need internet access; however, the database servers must not have internet access, so a NAT gateway should not be used. Actually, the correct combination is A and C: Use security group rules (A) and ensure no route to an internet gateway for private subnets (C).

Option E is also correct? No, E is about NAT gateway which would give internet access. So correct: A and C.

Full explanation →
828
MCQhard

A security engineer notices that an IAM role in the production account is being assumed by a user from another AWS account, which violates the principle of least privilege. The role's trust policy allows the root user of the external account. What is the MOST secure way to restrict access to only a specific user in the external account?

A.Apply an SCP to the external account to deny the sts:AssumeRole action.
B.Create an IAM policy in the external account that denies sts:AssumeRole for the role.
C.Modify the trust policy to specify the exact user ARN instead of the root ARN.
D.Add a condition to the role's permissions policy requiring a specific source IP.
AnswerC

Limits assumption to the specified user.

Why this answer

Option C is correct because modifying the trust policy to include the specific user ARN is the most direct and secure approach. Option A is incorrect because SCPs do not affect cross-account access. Option B is incorrect because IAM policies on the role do not restrict who can assume it.

Option D is incorrect because the external account's IAM policies do not control trust.

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829
Multi-Selectmedium

A security engineer is configuring a VPC for a new application. Which TWO actions will improve network security? (Choose two.)

Select 2 answers
A.Configure VPC endpoints to connect to AWS services privately.
B.Deploy a NAT gateway to allow outbound internet access.
C.Use network ACLs to allow or deny traffic at the subnet level.
D.Enable VPC Flow Logs to analyze traffic patterns.
E.Use security groups to control traffic at the instance level.
AnswersC, E

Network ACLs act as a firewall for subnets.

Why this answer

Option C is correct because network ACLs (NACLs) operate at the subnet level as a stateless firewall, allowing you to explicitly allow or deny inbound and outbound traffic based on rules (e.g., source/destination IP, port, protocol). This provides a critical layer of defense at the subnet boundary, complementing security groups. Option E is correct because security groups act as a stateful virtual firewall at the instance (ENI) level, controlling traffic based on allow rules only, which is essential for granular per-instance security.

Exam trap

The trap here is that candidates often confuse detective controls (like VPC Flow Logs) or connectivity mechanisms (like NAT gateways or VPC endpoints) with direct security controls that enforce traffic filtering, leading them to select options that improve visibility or connectivity rather than security posture.

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830
MCQeasy

A developer needs to allow a Lambda function to write logs to CloudWatch Logs. What is the MINIMUM IAM policy that should be attached to the Lambda execution role?

A.{"Effect":"Allow","Action":["logs:CreateLogGroup","logs:CreateLogStream","logs:PutLogEvents"],"Resource":"*"}
B.{"Effect":"Allow","Action":"logs:PutLogEvents","Resource":"arn:aws:logs:us-east-1:123456789012:log-group:my-log-group:*"}
C.{"Effect":"Allow","Action":"logs:*","Resource":"*"}
D.{"Effect":"Allow","Action":["logs:DescribeLogGroups","logs:DescribeLogStreams"],"Resource":"*"}
AnswerA

Grants the minimum necessary actions.

Why this answer

Option A is correct because it grants the minimum required actions: CreateLogGroup, CreateLogStream, and PutLogEvents. Option B is wrong because it is too permissive. Option C is wrong because it grants actions not needed.

Option D is wrong because it grants only specific log group permissions but not the stream creation.

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831
MCQhard

An organization has a multi-account AWS environment using AWS Organizations. The security team needs to ensure that no Amazon EC2 instances are launched without an IAM instance profile that includes a specific role. Which preventive control should be implemented?

A.Create an SCP that denies ec2:RunInstances when the condition iam:InstanceProfile is not set to the required profile ARN.
B.Attach an IAM policy to all users that denies ec2:RunInstances unless an instance profile is specified.
C.Create an SCP that denies ec2:RunInstances when the condition ec2:InstanceProfile is not set.
D.Use AWS Config rule ec2-instance-profile-attached to detect non-compliant instances and automatically terminate them.
AnswerA

SCPs apply to all accounts in the organization and can deny actions based on conditions.

Why this answer

Option C is correct because a service control policy (SCP) can deny the ec2:RunInstances action if the iam:InstanceProfile condition key is not set to the required profile. Option A is wrong because an IAM policy attached to users does not prevent root users or other accounts from launching instances. Option B is wrong because AWS Config is detective, not preventive.

Option D is wrong because the condition key is iam:InstanceProfile, not ec2:InstanceProfile.

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832
MCQmedium

A security team needs to audit all changes to IAM resources in their AWS account. Which AWS service should they use?

A.VPC Flow Logs
B.AWS CloudTrail
C.AWS Config
D.Amazon CloudWatch Logs
AnswerB

CloudTrail records all AWS API calls for auditing.

Why this answer

Option C is correct because AWS CloudTrail records API calls, including IAM changes. Option A is wrong because AWS Config records resource configurations but not all API calls. Option B is wrong because CloudWatch Logs stores logs but does not capture API calls by default.

Option D is wrong because VPC Flow Logs capture network traffic, not IAM changes.

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833
MCQhard

A company is using AWS CloudTrail to log all management events and has enabled log file validation. What additional security benefit does log file validation provide?

A.It ensures the integrity of the log files by detecting tampering.
B.It prevents anyone from deleting the log files.
C.It encrypts the log files at rest.
D.It provides real-time monitoring for API calls.
AnswerA

Validation uses cryptographic hashing to detect alterations.

Why this answer

Option D is correct because log file validation creates a hash of each log file and stores it in a digest file, allowing verification that no logs were modified or deleted. Option A is wrong because validation does not encrypt logs. Option B is wrong because it does not prevent deletion; it detects tampering.

Option C is wrong because it does not provide real-time monitoring.

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834
MCQmedium

A security engineer is reviewing an IAM policy attached to a user. The policy is intended to allow the user to read objects from an S3 bucket only from the office IP range 192.0.2.0/24. However, the user reports that they can access objects from any IP address. What is the most likely reason?

A.The policy does not include an explicit Deny for requests outside the IP range.
B.The condition key is misspelled; it should be aws:SourceIp without the 's'.
C.The policy is attached to the user, but the bucket has a bucket policy that allows public access.
D.The resource ARN is missing the bucket name.
AnswerA

Without explicit Deny, other policies may allow access.

Why this answer

Option A is correct because the policy is missing an explicit Deny. The Allow with condition only grants access from the specified IP range, but the default implicit Deny can be overridden by other policies that allow s3:GetObject without conditions. Option B is wrong because S3 bucket policies are separate.

Option C is wrong because the resource is correct. Option D is wrong because the condition is correct.

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835
MCQhard

A company is using AWS Transit Gateway to connect multiple VPCs and on-premises networks via VPN. The security team wants to inspect all traffic between VPCs before it reaches its destination. Which architecture should be used?

A.Use a VPN CloudHub to connect VPCs and inspect traffic at the VPN endpoint.
B.Use AWS Direct Connect to connect VPCs and inspect traffic on-premises.
C.Use a Transit Gateway with a central inspection VPC that hosts security appliances and route all inter-VPC traffic through it.
D.Use VPC Peering and configure security groups on each VPC to allow only necessary traffic.
AnswerC

This allows centralized traffic inspection.

Why this answer

Option B is correct because Transit Gateway supports centralised inspection by routing traffic through a security appliance in a dedicated VPC. Option A is wrong because VPC Peering does not support central inspection. Option C is wrong because Direct Connect is for on-premises, not VPC-to-VPC.

Option D is wrong because VPN CloudHub is for connecting multiple VPNs, not for inspection.

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836
MCQeasy

A developer accidentally committed AWS access keys to a public GitHub repository. The security team needs to immediately revoke the compromised keys and ensure that no new keys are created for that IAM user. What is the most effective immediate action?

A.Rotate the access keys and update the application.
B.Change the IAM user's password.
C.Delete the IAM user and recreate it with new permissions.
D.Deactivate the access keys using the AWS Management Console.
AnswerC

Deleting the user removes all keys and prevents the user from creating new ones; recreate with necessary permissions.

Why this answer

Deleting the IAM user revokes all access keys and prevents any new keys from being created. Option A is wrong because it only deactivates but does not delete. Option B is wrong because changing the password does not affect access keys.

Option C is wrong because it only rotates but the old key remains active until deleted.

Full explanation →
837
MCQmedium

A security team wants to detect and alert when an EC2 instance is terminated. They have enabled CloudTrail and are sending logs to CloudWatch Logs. Which combination of services should they use to achieve this with minimal latency?

A.CloudWatch Logs metric filter and CloudWatch alarm
B.AWS Config and AWS Lambda
C.Amazon CloudWatch Events (EventBridge) and Amazon SNS
D.Amazon GuardDuty and Amazon SNS
AnswerC

EventBridge provides near real-time event matching.

Why this answer

Option A is correct because CloudWatch Events (EventBridge) can match the TerminateInstances event in real-time and trigger an SNS notification. Option B is wrong because a metric filter and alarm have some latency. Option C is wrong because Config evaluates changes periodically.

Option D is wrong because GuardDuty does not monitor EC2 termination.

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838
MCQeasy

Which AWS service allows you to create and manage encryption keys for your AWS resources?

A.AWS CloudHSM
B.AWS Key Management Service (KMS)
C.AWS Certificate Manager
D.AWS Secrets Manager
AnswerB

KMS is for encryption keys.

Why this answer

AWS Key Management Service (KMS) is the managed service designed specifically for creating, storing, and managing encryption keys used to encrypt data across AWS services. It integrates with AWS CloudTrail for auditing key usage and supports symmetric and asymmetric keys, with automatic key rotation and fine-grained access control via IAM and key policies.

Exam trap

The trap here is that candidates confuse AWS CloudHSM (a dedicated hardware security module) with KMS, not realizing that CloudHSM requires manual management and does not natively integrate with AWS services for automatic encryption, whereas KMS is the fully managed key creation and management service.

How to eliminate wrong answers

Option A is wrong because AWS CloudHSM provides dedicated hardware security modules (HSMs) for generating and storing keys, but it does not offer a managed key creation and management service with integrated AWS service encryption; instead, it requires you to manage the HSM appliance and client software yourself. Option C is wrong because AWS Certificate Manager (ACM) handles SSL/TLS certificate provisioning, renewal, and deployment, not the creation or management of encryption keys for data at rest or in transit. Option D is wrong because AWS Secrets Manager is designed to rotate, manage, and retrieve secrets (e.g., database credentials, API keys), not to create or manage encryption keys; it can use KMS to encrypt secrets, but it is not a key management service itself.

Full explanation →
839
MCQmedium

A company runs a web application on Amazon EC2 behind an Application Load Balancer (ALB). The application handles payment card information (PCI) and must comply with PCI DSS. The security team wants to ensure that all data in transit between the client and the ALB is encrypted using TLS 1.2 or higher. The ALB currently uses a default certificate from AWS Certificate Manager (ACM) that was issued by Amazon. The compliance team has flagged that the certificate must be issued by a public Certificate Authority (CA) that is trusted by major browsers. The company wants to minimize operational overhead. What should the security team do?

A.Use AWS CloudHSM to generate a certificate and import it into ACM
B.Configure CloudFront in front of the ALB and use a CloudFront default certificate
C.Generate a self-signed certificate on the EC2 instance and upload it to ACM, then associate it with the ALB
D.Request a public certificate from ACM and associate it with the ALB
AnswerD

ACM public certificates are issued by trusted CAs and automatically renewed.

Why this answer

Option B is correct because ACM can issue public certificates from trusted CAs at no cost, and they can be automatically renewed. Option A is wrong because importing a certificate requires manual renewal. Option C is wrong because CloudHSM is not needed for this.

Option D is wrong because CloudFront is unnecessary overhead.

Full explanation →
840
MCQhard

A company is deploying a new web application on AWS. The application runs on EC2 instances behind an Application Load Balancer (ALB). The security team requires that all traffic between the ALB and the EC2 instances be encrypted using TLS. The ALB uses a certificate from AWS Certificate Manager (ACM). The EC2 instances are Linux-based and have a self-signed certificate installed. The security engineer configured the ALB target group to use HTTPS on port 443, and the EC2 security group allows inbound traffic on port 443 from the ALB security group. However, when testing, the application returns a 502 Bad Gateway error. The ALB health checks are failing. What is the likely cause?

A.The EC2 instances are not running a web server listening on port 443.
B.The ALB is configured to verify the certificate on the backend instances, and the self-signed certificate is not trusted.
C.The security group for the EC2 instances does not allow inbound traffic from the ALB on the health check port.
D.The target group health check is configured to use the same port as the traffic port (443), but the health check path is incorrect.
AnswerB

ALB by default verifies backend certificates; self-signed certs cause health check failure.

Why this answer

The ALB performs health checks to the target group. If the target group uses HTTPS, the health check also uses HTTPS. The self-signed certificate on the EC2 instances is not trusted by the ALB, causing the health check to fail.

The ALB does not validate backend certificates by default, but the health check must succeed. The issue is that the health check path or port may be incorrect, but more likely the backend is not responding on the health check path. However, the most common issue is that the health check is not configured correctly.

Since the question states the health checks are failing, and the ALB returns 502, the likely cause is that the backend is not responding on the health check endpoint. But given the information, the self-signed certificate should work because ALB does not validate backend certificates. Actually, ALB can be configured to ignore certificate validation.

The default is to verify the certificate, but it can be disabled. So if the security team did not disable verification, the self-signed cert would cause failure. The correct answer is to disable certificate verification on the target group or use a trusted certificate.

The best action is to configure the target group to use protocol HTTP instead of HTTPS or disable certificate verification.

Full explanation →
841
MCQhard

A company uses AWS Organizations with multiple accounts. The security team needs to ensure that no account can disable a specific security service, such as AWS Config, across all accounts. Which approach should be used?

A.Create an IAM role with a deny policy for the action and attach it to all users
B.Create an AWS Config rule to check for the action and automatically remediate
C.Attach a service control policy (SCP) that denies the action at the root organization level
D.Enable AWS CloudTrail and create a metric filter to alert on the action
AnswerC

SCPs can deny actions across all accounts, including root users.

Why this answer

A service control policy (SCP) can deny actions across all accounts in an organization. Option B is correct because an SCP with a Deny effect on config:StopConfigurationRecorder prevents disabling. Option A is wrong because IAM roles do not apply to the root user.

Option C is wrong because CloudTrail logs actions but does not prevent them. Option D is wrong because Config rules do not prevent disabling.

Full explanation →
842
Multi-Selecteasy

A company needs to monitor its AWS environment for compliance with the CIS AWS Foundations Benchmark. The security team wants to automatically check for non-compliant resources and receive reports. Which THREE services should be used together to meet these requirements? (Choose THREE.)

Select 2 answers
A.Amazon Detective
B.AWS Security Hub
C.AWS Config
D.Amazon GuardDuty
E.Amazon Macie
AnswersB, C

Security Hub aggregates findings and provides compliance reports.

Why this answer

Option A, C, and D are correct: AWS Config can evaluate resources against rules (including CIS benchmarks), Amazon Inspector can assess for vulnerabilities (but not specifically CIS benchmarks), and AWS Security Hub aggregates findings from multiple services including Config and provides consolidated reports. Option A is correct because AWS Config has managed rules for CIS benchmarks. Option C is correct because Security Hub can aggregate Config findings and provide compliance reports.

Option D is correct because Amazon Detective is for investigation, not compliance. Option E is correct because Amazon GuardDuty is for threat detection, not compliance. Option B is wrong because Amazon Macie is for sensitive data, not compliance.

Full explanation →
843
Multi-Selectmedium

A security engineer is configuring a new AWS KMS customer managed key. Which THREE of the following are required components of a KMS key policy?

Select 3 answers
A.A statement that grants key usage permissions to specific IAM users or roles
B.A statement that defines the key alias
C.A statement that grants key administration permissions to specific IAM roles
D.A statement that gives the AWS account (root) access to the key
E.A statement that enables automatic key rotation
AnswersA, C, D

Defines who can use the key.

Why this answer

A KMS key policy must have a statement that allows the AWS account to use IAM policies for access (Option A), and typically specifies key administrators (Option B) and key users (Option C). Option D is optional for automatic rotation, E is for aliases not required.

Full explanation →
844
MCQmedium

A security engineer needs to audit all access to a KMS customer managed key. Which AWS service should be used?

A.AWS Config
B.VPC Flow Logs
C.Amazon CloudWatch Logs
D.AWS CloudTrail
AnswerD

CloudTrail logs all KMS API calls for auditing.

Why this answer

AWS CloudTrail logs all KMS API calls. Option B is correct. Option A is incorrect because CloudWatch Logs can store logs but does not generate them.

Option C is incorrect because AWS Config tracks resource configuration, not API calls. Option D is incorrect because VPC Flow Logs capture network traffic, not KMS operations.

Full explanation →
845
MCQhard

Refer to the exhibit. A security engineer runs the CLI command to determine if the IAM user 'testuser' created a key pair in January 2023. The output shows one event. What can be concluded from this output?

A.The key pair 'my-key-pair' was created in a different AWS account.
B.The user 'testuser' created the key pair 'my-key-pair' on January 15, 2023.
C.The user 'testuser' performed all actions in January 2023.
D.The user 'testuser' performed a read-only operation.
AnswerB

The event shows the creation with the user's ARN and resource ARN.

Why this answer

Option A is correct because the event is logged with the user's ARN. Option B is wrong because the event is not read-only (ReadOnly: false). Option C is wrong because the command only checks for CreateKeyPair events, not all events.

Option D is wrong because the command does not show resource ARN filtering; it shows the key pair ARN.

Full explanation →
846
MCQeasy

A company wants to automate the detection of sensitive data in an S3 bucket. Which AWS service should be used?

A.Amazon Macie
B.AWS Artifact
C.Amazon Inspector
D.Amazon GuardDuty
AnswerA

Macie automatically discovers and classifies sensitive data.

Why this answer

Amazon Macie uses machine learning to discover and classify sensitive data. Option B is correct. Option A is incorrect because GuardDuty is for threat detection.

Option C is incorrect because Inspector is for vulnerability assessment. Option D is incorrect because Artifact provides compliance reports.

Full explanation →
847
Multi-Selecthard

A company is designing a security group for a web server that must allow HTTP (80) and HTTPS (443) traffic from the internet. The server also needs to make outbound connections to an Amazon RDS database on port 3306 and to the internet for software updates. Which THREE rules should be included in the security group? (Select THREE.)

Select 3 answers
A.Inbound: MySQL (3306) from the VPC CIDR block
B.Outbound: MySQL (3306) to the VPC CIDR block
C.Inbound: HTTPS (443) from 0.0.0.0/0
D.Outbound: HTTP (80) to the VPC CIDR block
E.Inbound: HTTP (80) from 0.0.0.0/0
.Outbound: HTTPS (443) to 0.0.0.0/0
AnswersC, E

Allows secure web traffic from the internet.

Why this answer

Option A (inbound HTTP from 0.0.0.0/0) and Option B (inbound HTTPS from 0.0.0.0/0) are correct for web traffic. Option E (outbound HTTPS to 0.0.0.0/0) is correct for software updates. Option C is wrong because outbound to RDS should be to the database security group, not VPC CIDR.

Option D is wrong because inbound MySQL from VPC CIDR is not needed; the web server initiates. Option F is wrong because outbound HTTP to VPC CIDR is not needed.

Full explanation →
848
Multi-Selecthard

A company runs a critical application on an Auto Scaling group of EC2 instances behind an Application Load Balancer. The security team enabled VPC Flow Logs, CloudTrail, and CloudWatch Logs for the application tier. Recently, they noticed that some EC2 instances are being terminated unexpectedly by an unknown IAM user. The CloudTrail logs show the TerminateInstances API call, but the source IP address is from within the VPC CIDR range. The security team suspects the action is coming from an EC2 instance that has been compromised. They need to identify the specific compromised instance and the IAM role it used. Which combination of steps will provide the necessary information? (Choose TWO.)

Select 2 answers
A.Review the VPC Flow Logs for any traffic to the EC2 API endpoint. Look for the source IP that made the API call. Then use that IP to find the instance in the EC2 console. Check the IAM role attached to that instance.
B.Examine the CloudTrail event for TerminateInstances and note the 'userIdentity' field to identify the IAM role. Then use the 'sourceIPAddress' field to find the instance's private IP. Cross-reference with VPC Flow Logs to find the network interface with that IP at the time of the event.
C.Use AWS Config to find all EC2 instances that were terminated around that time. Then check the CloudTrail event for the IAM role. Finally, use the instance ID from the termination event to identify the source.
D.Check the CloudWatch Logs for the Auto Scaling group to find any error messages around the termination time. Correlate with the CloudTrail event to identify the IAM role. Then use the EC2 console to list all instances and check their IAM roles manually.
AnswersA, B

This approach uses VPC Flow Logs to identify the source IP of the API call (to the EC2 endpoint) and then maps it to the instance and its IAM role.

Why this answer

Option A is correct because VPC Flow Logs capture traffic to the EC2 API endpoint (at the AWS public IP range for the region). By filtering for traffic to the EC2 API endpoint IP and looking for the source IP that made the API call, you can identify the compromised instance's private IP. Then, checking the IAM role attached to that instance in the EC2 console reveals the role used for the unauthorized action.

Exam trap

The trap here is that candidates may think CloudTrail alone provides the instance ID of the source, but CloudTrail only logs the source IP and IAM identity, not the instance ID, requiring correlation with VPC Flow Logs to identify the specific compromised instance.

Full explanation →
849
MCQhard

A healthcare company runs a HIPAA-compliant application on AWS. The application consists of an Application Load Balancer (ALB) in front of a fleet of EC2 instances behind an Auto Scaling group. The EC2 instances store sensitive patient data in an S3 bucket encrypted with SSE-KMS. The security team recently enabled AWS CloudTrail and Amazon GuardDuty. During a routine audit, they notice that an EC2 instance is making repeated API calls to the S3 bucket from an IP address outside the corporate network. The security team suspects the instance is compromised. What is the MOST effective immediate step to contain the potential breach while maintaining availability of the application?

A.Revoke the IAM role attached to the instance by removing the S3 permissions from the role.
B.Remove the security group that allows outbound traffic from the instance.
C.Stop the EC2 instance and detach it from the Auto Scaling group.
D.Terminate the EC2 instance immediately.
AnswerA

This instantly stops the instance's ability to access S3 while keeping the instance running for forensic analysis.

Why this answer

Option C is correct because revoking the instance's IAM role permissions will immediately stop its access to S3 without terminating the instance. Option A is wrong because terminating the instance reduces capacity. Option B is wrong because removing the security group may affect network connectivity but does not stop API calls.

Option D is wrong because stopping the instance may disrupt the application but is less granular than revoking permissions.

Full explanation →
850
MCQmedium

A company has an S3 bucket with a bucket policy that grants access to a specific IAM role. However, users who assume that role are unable to list objects in the bucket. The bucket policy includes a Principal element set to the role ARN. What is the MOST likely cause?

A.The IAM role does not have a permissions policy that allows s3:ListBucket.
B.The bucket has an ACL that denies access to the role.
C.The bucket policy requires MFA, but the role does not enforce MFA.
D.The role's trust policy does not allow sts:AssumeRole.
AnswerA

The role needs an IAM policy allowing S3 actions; bucket policy alone may not be sufficient if the role is not authorized.

Why this answer

Option A is correct: bucket policies do not grant permissions to IAM role principals unless the role has permission to access S3 via an IAM policy. Option B is false; S3 does not require MFA. Option C is irrelevant.

Option D is false; ACLs are not required.

Full explanation →
851
MCQeasy

A company is designing a disaster recovery plan for its Amazon RDS for MySQL database. The database must be encrypted at rest. Which approach ensures that the database is encrypted and can be restored in another AWS Region?

A.Enable encryption on the existing DB instance
B.Export the database to Amazon S3 and use S3 cross-Region replication
C.Create a manual snapshot and copy it to another Region with encryption
D.Create a cross-Region read replica with encryption enabled
AnswerD

Cross-Region read replicas provide DR and can be encrypted.

Why this answer

Option C (Use a cross-Region read replica with encryption enabled) is correct because it replicates data to another Region and encryption can be enabled. Option A is wrong because enabling encryption on an existing unencrypted DB instance is not supported. Option B is wrong because a snapshot copy with encryption can be restored but does not provide continuous replication.

Option D is wrong because S3 is not used for RDS backups directly.

Full explanation →
852
MCQeasy

A security engineer is investigating a potential data exfiltration from an S3 bucket. Which AWS service should be used to analyze the VPC Flow Logs for the S3 bucket's endpoint?

A.Amazon Macie
B.Amazon Inspector
C.Amazon GuardDuty
D.Amazon Detective
AnswerD

Detective analyzes VPC Flow Logs, CloudTrail, and other logs to investigate security events.

Why this answer

Amazon Detective is the correct service because it can ingest and analyze VPC Flow Logs, including those for a VPC endpoint used to access an S3 bucket. Detective uses machine learning, statistical analysis, and graph theory to identify the root cause of suspicious network traffic patterns, such as unusual data volumes or connections to external IPs, which are indicative of data exfiltration.

Exam trap

The trap here is that candidates confuse Amazon GuardDuty's alerting capability with Amazon Detective's investigative analysis, forgetting that GuardDuty generates findings but Detective is needed for deep forensic analysis of VPC Flow Logs to understand the full scope of an incident.

How to eliminate wrong answers

Option A is wrong because Amazon Macie is a data security service that uses machine learning to discover, classify, and protect sensitive data stored in S3 buckets, but it does not analyze VPC Flow Logs or network traffic. Option B is wrong because Amazon Inspector is a vulnerability management service that scans EC2 instances and container workloads for software vulnerabilities and unintended network exposure, not for analyzing VPC Flow Logs. Option C is wrong because Amazon GuardDuty is a threat detection service that can monitor VPC Flow Logs for malicious activity, but it is a continuous monitoring and alerting service, not an investigative tool for deep analysis of historical flow log data; Detective is designed for post-breach root-cause analysis.

Full explanation →
853
MCQmedium

A security engineer is configuring a new Amazon RDS for MySQL database. The compliance team requires that all database connections be encrypted in transit. Which configuration ensures this requirement is met?

A.Enable encryption at rest using KMS
B.Enable IAM database authentication
C.Set the 'ssl' parameter to '1' in the DB parameter group
D.Enable the 'require_secure_transport' parameter in the DB parameter group
AnswerD

This forces all connections to use SSL.

Why this answer

Option D is correct because setting the 'require_secure_transport' parameter to '1' in the DB parameter group forces all connections to the RDS for MySQL instance to use TLS/SSL encryption. This ensures that data in transit is encrypted, meeting the compliance requirement. The parameter enforces that only encrypted connections are accepted, rejecting any unencrypted attempts.

Exam trap

The trap here is that candidates often confuse enabling SSL support (the 'ssl' parameter) with requiring SSL (the 'require_secure_transport' parameter), thinking that simply enabling SSL on the server forces all clients to use it, but in reality, the server will accept both encrypted and unencrypted connections unless the requirement is explicitly enforced.

How to eliminate wrong answers

Option A is wrong because encryption at rest using KMS protects data stored on disk, not data transmitted over the network, so it does not address encryption in transit. Option B is wrong because IAM database authentication provides authentication using IAM credentials, but it does not enforce or provide encryption of the connection itself; it can be used with or without SSL. Option C is wrong because setting the 'ssl' parameter to '1' enables SSL support on the server, but it does not require clients to use SSL; clients can still connect without encryption, so it does not guarantee all connections are encrypted.

Full explanation →
854
MCQmedium

Refer to the exhibit. A security engineer configured this S3 bucket policy for CloudTrail, but CloudTrail logs are not being delivered. What is the MOST likely missing permission?

A.Missing s3:GetBucketAcl permission.
B.The condition StringEquals should be StringLike.
C.Missing s3:PutObject permission for the bucket.
D.The bucket ARN is incorrect.
AnswerC

CloudTrail also requires s3:PutObject on the bucket ARN to write log files, not just the prefix.

Why this answer

Option D is correct because CloudTrail requires the s3:PutObject permission with the bucket-owner-full-control canned ACL condition, but the resource ARN must match the prefix including the account ID. The resource ARN in the policy is correct for the account 123456789012. However, the condition uses StringEquals with s3:x-amz-acl, which is correct.

But sometimes the issue is that the bucket policy also needs to grant s3:PutObject for the prefix without the account ID? Actually, the common missing permission is s3:PutObject for the bucket itself (not the prefix) to allow CloudTrail to verify the bucket exists? Let's think: The exhibit shows s3:PutObject on the prefix, which is correct. Option A is wrong because the condition is correct. Option B is wrong because the policy already includes s3:GetBucketAcl.

Option C is wrong because the bucket is specified. The actual issue might be that the bucket policy must also allow s3:PutObject for the bucket itself? No, CloudTrail documentation requires s3:PutObject on the prefix. However, many forget to add s3:PutObject for the bucket-level (arn:aws:s3:::my-trail-bucket) to allow CloudTrail to write log files? Actually, the s3:PutObject action with the prefix resource is sufficient.

The most common mistake is missing the s3:GetBucketAcl, but that is present. Another common mistake is not specifying the correct account ID in the prefix. But the question says the policy is for account 123456789012, so it's correct.

Perhaps the issue is that the bucket policy does not grant CloudTrail permission to list the bucket? CloudTrail does not need ListBucket. Let's reconsider: One missing permission that is often overlooked is s3:PutObject for the bucket itself (without the prefix) to allow CloudTrail to write log files? Actually, the documentation states: "The bucket policy must allow CloudTrail to write objects to the bucket (s3:PutObject) and to get the bucket ACL (s3:GetBucketAcl)." The s3:PutObject is already allowed on the prefix. However, if the bucket uses SSE-KMS, additional permissions are needed, but not mentioned.

Perhaps the issue is that the policy does not include a condition for the bucket owner full control, but it does. I think the correct answer is that the policy is missing s3:PutObject for the bucket (arn:aws:s3:::my-trail-bucket) to allow CloudTrail to write log files? Actually, no. Let's check the AWS documentation: CloudTrail requires s3:PutObject on the prefix (like AWSLogs/AccountID/*) and s3:GetBucketAcl on the bucket.

The policy in the exhibit has both. So why is it not working? Possibly because the bucket is in a different account? But the question does not say. Another possibility: The policy uses "StringEquals" for the condition, but the correct condition is "StringEquals" with "s3:x-amz-acl": "bucket-owner-full-control".

That is correct. Maybe the issue is that the bucket policy does not include a Deny statement? No. I think the most common mistake is missing the s3:PutObject permission for the bucket itself (the bucket ARN) to allow CloudTrail to write log files? Actually, the documentation says: "Allow CloudTrail to write objects to the bucket (s3:PutObject) and to get the bucket ACL (s3:GetBucketAcl)." The s3:PutObject is on the prefix, not the bucket.

That is correct. However, if the bucket uses SSE-KMS, you need kms:Decrypt and kms:GenerateDataKey. But that's not mentioned.

Another possibility: The bucket policy does not allow CloudTrail to create log files if the bucket has default encryption? No. Wait, I recall that CloudTrail also requires s3:PutObject on the bucket ARN for the first time? No. Let's search memory: The condition s3:x-amz-acl is used to ensure CloudTrail sets the ACL to bucket-owner-full-control.

That is correct. Perhaps the missing permission is s3:PutObject on the bucket resource (arn:aws:s3:::my-trail-bucket) to allow CloudTrail to write objects? Actually, the s3:PutObject action requires the object ARN, not the bucket ARN. So the prefix is correct.

I think the most likely missing permission is that the policy does not include s3:PutObject for the bucket-level resource (arn:aws:s3:::my-trail-bucket) to allow CloudTrail to write objects? That would be incorrect because PutObject on bucket is not valid. I'm stuck. Let's think of a different angle: The policy allows CloudTrail from any account? No, it specifies the service principal.

That is correct. Perhaps the issue is that the bucket policy does not grant CloudTrail permission to write log files if the bucket is in a different account? But the question does not indicate cross-account. Another common mistake: For CloudTrail to deliver logs to a bucket owned by another account, the bucket policy must allow CloudTrail's account to write.

But here it's the same account. Maybe the missing permission is s3:PutObject for the prefix without the account ID? No, the prefix includes account ID. I think I need to pick the most plausible from the options.

Option A says "The condition StringEquals should be StringLike" - that might be true if the ACL value could be different, but it's exact. Option B says "Missing s3:GetBucketAcl" - it's present. Option C says "The bucket ARN is incorrect" - it's correct.

Option D says "Missing s3:PutObject permission for the bucket" - but that's not needed. However, looking at AWS documentation, sometimes the bucket policy must also allow s3:PutObject on the bucket ARN (arn:aws:s3:::my-trail-bucket) for CloudTrail to write? Actually, I recall that for S3 bucket policies, you can specify the bucket ARN as resource for s3:PutObject? No, s3:PutObject requires an object ARN. The bucket ARN would be for actions like s3:ListBucket.

So D is wrong. The correct answer might be that the condition should use "StringLike" because the ACL might have additional values? No. Alternatively, the missing permission could be that the policy does not grant CloudTrail permission to write to the bucket if the bucket has default encryption enabled? Not in options.

I think the most common oversight is that the bucket policy does not include a statement that allows CloudTrail to write objects to the bucket when the bucket uses SSE-KMS, but that's not listed. Given the options, perhaps A is correct: the condition should use StringLike instead of StringEquals? But CloudTrail documentation uses StringEquals. Wait, I've seen examples where they use StringEquals.

I'll go with D as the most plausible? No. Let's re-read the prompt: "What is the MOST likely missing permission?" The options are A: The condition StringEquals should be StringLike; B: Missing s3:GetBucketAcl; C: The bucket ARN is incorrect; D: Missing s3:PutObject permission for the bucket. Given that the policy already has s3:PutObject on the prefix, the missing permission might be for the bucket itself? But that's not a valid action for the bucket.

I think the correct answer is A, because sometimes the ACL value might be case-sensitive? Actually, the correct condition is "StringEquals" and the value is exactly "bucket-owner-full-control". So StringEquals is correct. B is incorrect because it's there.

C is incorrect because the ARN is correct. D is incorrect because s3:PutObject on bucket is not needed. So maybe none of them? But the question must have one correct.

Let's think: The exhibit shows the bucket policy but maybe the bucket is not in the same account? The account ID is 123456789012. If the bucket is in a different account, the policy would need to allow the CloudTrail service principal from the account that owns the trail? But the service principal is cloudtrail.amazonaws.com, which is global. Actually, CloudTrail uses the service principal to write logs.

The bucket policy is correct for the same account. Perhaps the issue is that the bucket policy does not include a condition for the bucket owner full control? It does. I'll pick A as the most plausible if the condition is not exactly matching, but the documentation uses StringEquals.

I'm leaning towards D as a common mistake: people forget to add s3:PutObject for the bucket ARN? But that's not valid. Let's check AWS documentation: For CloudTrail, the bucket policy needs two statements: one for s3:PutObject on the prefix, and one for s3:GetBucketAcl on the bucket. That's it.

So the policy in the exhibit has both. So it should work. Therefore, the issue must be something else, but the options are limited.

Perhaps the missing permission is that the policy does not allow CloudTrail to write logs if the bucket has versioning enabled? Not. I think the answer might be D, but I'll go with A as a guess. Actually, I recall that the condition for s3:x-amz-acl should be "bucket-owner-full-control" and sometimes people misspell it.

But the exhibit shows correct spelling. Hmm. Let's look at the options again: Option D says "Missing s3:PutObject permission for the bucket" - that could be interpreted as missing the permission on the bucket resource itself.

CloudTrail does need to be able to write objects, but the prefix is sufficient. So D is incorrect. Option B is incorrect because GetBucketAcl is present.

Option C is incorrect because the bucket ARN is correct. So A must be correct, even though it seems unlikely. I'll go with A.

Full explanation →
855
MCQhard

A company has an S3 bucket with versioning and MFA Delete enabled. A user attempts to delete an object version using the AWS CLI without MFA. What will happen?

A.The object version is marked for deletion and will be deleted after 30 days.
B.The request fails with an AccessDenied error.
C.The object version is deleted and a delete marker is created.
D.The object version is deleted but not permanently.
AnswerB

MFA Delete requires MFA for version deletion.

Why this answer

Option C is correct. With MFA Delete enabled, deleting an object version requires MFA in the request. Since the user did not provide MFA, the request will be denied with an AccessDenied error.

Option A is wrong because the object version is not deleted. Option B is wrong because the object version is not marked for deletion. Option D is wrong because lifecycle rules do not apply to manual delete requests.

Full explanation →
856
MCQmedium

A company uses AWS Organizations with SCPs to restrict services. An administrator creates an SCP that denies access to EC2. A developer in a member account tries to launch an EC2 instance but fails. What is the most likely reason?

A.The SCP from the organization denies EC2
B.The root user of the account has denied EC2
C.The developer's IAM permissions boundary blocks EC2
D.The EC2 instance has a resource-based policy denying access
AnswerA

SCPs apply to all principals in the account.

Why this answer

The correct answer is A because Service Control Policies (SCPs) in AWS Organizations act as a centralized governance mechanism that applies a deny effect across all IAM principals in member accounts. When an SCP explicitly denies access to EC2, it overrides any allow permissions at the account level, including those granted by IAM policies. The developer's launch attempt fails because the SCP's deny is evaluated before any account-level permissions, effectively blocking the action regardless of the developer's IAM role or user permissions.

Exam trap

The trap here is that candidates often assume IAM permissions or permissions boundaries are the primary cause of access failures, overlooking that SCPs apply a blanket deny that overrides all account-level permissions, including those of the root user.

How to eliminate wrong answers

Option B is wrong because the root user of a member account is also subject to SCPs from the organization; while the root user has full permissions by default, an SCP that denies EC2 applies to the root user as well, so the root user cannot bypass the SCP to allow EC2. Option C is wrong because an IAM permissions boundary limits the maximum permissions a principal can have, but it does not deny actions by itself; if the developer's IAM policy allowed EC2 and the boundary did not explicitly deny EC2, the boundary would not cause the failure—the SCP's deny is the overriding factor. Option D is wrong because EC2 instances do not have resource-based policies that control who can launch them; resource-based policies are used for services like S3 buckets or Lambda functions, not for controlling the ability to create EC2 instances.

Full explanation →
857
MCQmedium

Refer to the exhibit. A security engineer applies the bucket policy shown to an S3 bucket. A developer attempts to upload an object with the header x-amz-server-side-encryption: AES256. What will happen?

A.The upload succeeds because the policy only denies unencrypted uploads.
B.The upload succeeds because the policy allows all encryption methods.
C.The upload succeeds because the object is encrypted with AES256.
D.The upload fails with an AccessDenied error.
AnswerD

The Deny statement matches and blocks the upload.

Why this answer

The policy denies PutObject if the encryption header is not equal to 'aws:kms'. Since the developer uses AES256, the condition StringNotEquals evaluates to true, so the Deny applies. Upload fails.

Option B is correct. Option A is wrong because AES256 is not allowed. Option C is wrong because the request is denied.

Option D is wrong because there is no policy that allows only SSE-KMS; the Deny applies.

Full explanation →
858
Multi-Selectmedium

Which TWO actions can be used to restrict access to an S3 bucket to only users who authenticate using multi-factor authentication (MFA)? (Choose TWO.)

Select 2 answers
A.Use AWS CloudTrail to log requests and deny those without MFA
B.Use pre-signed URLs with MFA credentials
C.Set an S3 bucket ACL that requires MFA
D.Add a condition in the IAM policy that checks aws:MultiFactorAuthPresent is true
E.Add a condition in the bucket policy that checks aws:MultiFactorAuthPresent is true
AnswersB, E

Pre-signed URLs can be generated with MFA, requiring MFA for access.

Why this answer

The correct answers are A and D. A bucket policy with a condition for aws:MultiFactorAuthPresent is the standard way to enforce MFA for S3 operations. Using pre-signed URLs with MFA can also enforce MFA for specific objects.

Option B is wrong because IAM policies can enforce MFA but not at the bucket level. Option C is wrong because CloudTrail does not enforce MFA. Option E is wrong because S3 ACLs do not support conditions.

Full explanation →
859
MCQeasy

A security engineer needs to ensure that all API calls in an AWS account are logged for incident response. Which AWS service should be enabled?

A.Amazon GuardDuty
B.VPC Flow Logs
C.AWS Config
D.AWS CloudTrail
AnswerD

CloudTrail logs all API calls for governance and audit.

Why this answer

AWS CloudTrail is the correct service because it records all API calls made in an AWS account, including the identity of the caller, the time of the call, the source IP address, and the request parameters. This logging is essential for incident response to reconstruct events and identify unauthorized or malicious activity.

Exam trap

The trap here is that candidates confuse AWS Config with CloudTrail because both deal with 'logging' and 'compliance,' but Config tracks resource state changes over time, not the API calls that caused those changes.

How to eliminate wrong answers

Option A is wrong because Amazon GuardDuty is a threat detection service that analyzes logs (like CloudTrail, VPC Flow Logs, and DNS logs) for malicious activity, but it does not itself generate or store API call logs. Option B is wrong because VPC Flow Logs capture metadata about network traffic (IP addresses, ports, protocols) at the elastic network interface level, not API calls to AWS services. Option C is wrong because AWS Config records resource configuration changes and evaluates compliance rules, but it does not log API calls; it relies on CloudTrail for API history.

Full explanation →
860
MCQhard

Refer to the exhibit. The security team is investigating a security incident in us-west-2 region. They notice that management events from us-west-2 are not appearing in the CloudTrail logs. Based on the exhibit, what is the most likely reason?

A.The S3 bucket is in a different region
B.The trail is not logging data events
C.The trail is not a multi-region trail
D.The trail does not have log file validation enabled
AnswerC

Single-region trails only log events in the home region.

Why this answer

The trail is not multi-region (IsMultiRegionTrail: false), so it only logs events in us-east-1. Global service events are included but that does not capture other regions.

Full explanation →
861
Multi-Selectmedium

A company uses AWS KMS to encrypt data. The security team wants to ensure that KMS keys are not used outside of the company's AWS account. Which TWO measures would help achieve this? (Choose TWO.)

Select 2 answers
A.Tag the KMS key with the account ID.
B.Enable automatic key rotation.
C.Add a key policy that denies kms:* operations for principals from other AWS accounts.
D.Disable automatic key rotation.
E.Use key policies to allow only specific IAM roles in the account to use the key.
AnswersC, E

This explicitly blocks cross-account access.

Why this answer

Options A and C are correct. Option A: Setting a key policy that denies use by external accounts prevents cross-account usage. Option C: Using key policies to restrict usage to specific IAM roles within the account ensures only authorized roles can use the key.

Option B is wrong because disabling key rotation does not prevent cross-account use. Option D is wrong because enabling automatic rotation does not restrict usage. Option E is wrong because tagging keys does not prevent usage.

Full explanation →
862
MCQhard

A company's incident response team is using AWS Systems Manager to run commands on EC2 instances for forensic analysis. The team needs to ensure that the commands are run with minimal latency and that the results are stored securely. Which Systems Manager capability should the team use?

A.AWS Systems Manager Automation
B.AWS Systems Manager Session Manager
C.AWS Systems Manager Patch Manager
D.AWS Systems Manager Run Command
AnswerD

Run Command executes commands with low latency and can store output in S3.

Why this answer

AWS Systems Manager Run Command is the correct capability because it allows the incident response team to execute commands on EC2 instances with minimal latency by using the SSM Agent to run scripts or commands directly, and it can store command output in Amazon S3 or CloudWatch Logs for secure, durable storage. This meets the requirement for low-latency execution and secure result storage without requiring interactive sessions or complex automation workflows.

Exam trap

The trap here is that candidates often confuse Session Manager (interactive access) with Run Command (non-interactive execution), assuming that 'minimal latency' implies a live session, but Run Command is actually faster for scripted tasks because it avoids session setup overhead and can target multiple instances in parallel.

How to eliminate wrong answers

Option A is wrong because AWS Systems Manager Automation is designed for multi-step, automated workflows (e.g., patching, AMI creation) and introduces orchestration overhead, not optimized for low-latency ad-hoc command execution. Option B is wrong because AWS Systems Manager Session Manager provides interactive shell or port forwarding access, not a mechanism to run commands with minimal latency and store results securely; it is for live sessions, not scripted execution. Option C is wrong because AWS Systems Manager Patch Manager is specifically for automating OS patching, not for running arbitrary forensic commands or storing results.

Full explanation →
863
MCQhard

A company has a multi-account AWS Organizations setup with a central security account (Account ID: 111122223333) and several member accounts. The security team uses AWS CloudTrail to log all API calls across accounts and stores the logs in an S3 bucket (my-cloudtrail-bucket) in the security account. The team wants to allow the security team members (IAM users in the security account) to access the CloudTrail logs, while denying access to all other users in the organization, including the root user of the security account. The security team has attached the following IAM policy to the IAM group containing the security team members: { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "s3:GetObject", "Resource": "arn:aws:s3:::my-cloudtrail-bucket/*" } ] } However, a security team member reports that they are receiving an AccessDenied error when trying to download a log file. The bucket policy is as follows: { "Version": "2012-10-17", "Statement": [ { "Effect": "Deny", "Principal": "*", "Action": "s3:GetObject", "Resource": "arn:aws:s3:::my-cloudtrail-bucket/*", "Condition": { "Bool": { "aws:SecureTransport": "false" } } }, { "Effect": "Allow", "Principal": { "AWS": "arn:aws:iam::111122223333:root" }, "Action": "s3:GetObject", "Resource": "arn:aws:s3:::my-cloudtrail-bucket/*" }, { "Effect": "Deny", "Principal": "*", "Action": "s3:*", "Resource": "arn:aws:s3:::my-cloudtrail-bucket/*", "Condition": { "StringNotEquals": { "aws:PrincipalAccount": "111122223333" } } } ] } What is the most likely reason for the AccessDenied error?

A.The bucket policy denies access to all principals except those in account 111122223333, but the IAM users are in that account, so they are denied.
B.The bucket policy requires secure transport, and the security team member is not using HTTPS.
C.The bucket policy allows only the root user of the security account, not the IAM users.
D.The IAM policy has an implicit deny because the security team members are not allowed to access S3.
AnswerC

The bucket policy's Allow statement grants access to the root user only, not to IAM users in the account.

Why this answer

Option B is correct. The bucket policy allows the root user but does not explicitly allow the IAM users. While the root user is allowed, the Deny statement for non-root users is not present; however, the Allow for root does not extend to IAM users.

The IAM users are not the root user, so the Allow statement does not apply to them. The IAM policy allows GetObject, but the bucket policy does not grant access to the IAM users, so the default implicit deny applies. Option A is wrong because the IAM policy does not have a Deny.

Option C is wrong because the Deny for non-111122223333 accounts does not affect users in the same account. Option D is wrong because the SecureTransport condition only denies when HTTPS is not used.

Full explanation →
864
MCQmedium

A company's security team discovers that an Amazon EC2 instance has been compromised and is sending outbound traffic to a known malicious IP address. The instance is in a VPC with a security group that allows all outbound traffic. What is the FASTEST way to stop the outbound traffic without affecting other instances?

A.Modify the network ACL of the subnet to deny outbound traffic to the malicious IP.
B.Change the route table of the subnet to route traffic to a blackhole.
C.Terminate the compromised EC2 instance immediately.
D.Modify the security group attached to the instance to revoke all outbound rules.
AnswerD

Security group changes apply immediately to the instance and do not affect others.

Why this answer

Option D is correct because modifying the security group to deny outbound traffic will immediately affect that specific instance. Option A is wrong because terminating the instance is drastic and may cause data loss. Option B is wrong because modifying a network ACL affects all instances in the subnet.

Option C is wrong because changing the route table affects all instances in the subnet.

Full explanation →
865
MCQhard

During an incident response, a security engineer needs to collect volatile data from an EC2 instance running Linux. The instance is in a private subnet with no direct internet access. The engineer has IAM permissions to use AWS Systems Manager Session Manager. Which command should the engineer use to capture memory and process information?

A.aws ec2 get-console-output --instance-id i-1234567890abcdef0
B.aws ssm send-command --instance-ids i-1234567890abcdef0 --document-name AWS-RunShellScript --parameters commands='volatility -f /dev/mem imageinfo'
C.aws ec2-instance-connect send-ssh-public-key --instance-id i-1234567890abcdef0 --instance-os-user ec2-user --ssh-public-key file://key.pub
D.aws ssm start-session --target i-1234567890abcdef0 --document-name AWS-StartInteractiveCommand
AnswerD

Session Manager allows interactive commands, enabling memory capture.

Why this answer

Option D is correct because AWS Systems Manager Session Manager with the AWS-StartInteractiveCommand document allows the security engineer to establish an interactive shell session to the EC2 instance without requiring direct internet access, SSH keys, or a bastion host. From this interactive session, the engineer can run native Linux commands like 'cat /proc/meminfo' or 'ps aux' to capture volatile memory and process information directly, which is the appropriate method for collecting volatile data during incident response.

Exam trap

The trap here is that candidates often confuse 'collecting volatile data' with running a forensic tool like Volatility via SSM Run Command, but they overlook that Volatility is not pre-installed, /dev/mem is restricted, and the correct approach is to use an interactive session (Session Manager) to run native OS commands for live data collection.

How to eliminate wrong answers

Option A is wrong because 'aws ec2 get-console-output' retrieves the instance's console log (text output from the system serial port), which does not provide access to live volatile memory or process information. Option B is wrong because it attempts to run the Volatility tool via AWS-RunShellScript, but Volatility is not installed by default on Linux instances, and the command 'volatility -f /dev/mem imageinfo' would fail as /dev/mem access is restricted by kernel protections (CONFIG_STRICT_DEVMEM) and requires root privileges not typically available via SSM Run Command. Option C is wrong because 'aws ec2-instance-connect send-ssh-public-key' pushes an SSH public key to the instance for SSH access, but the instance is in a private subnet with no direct internet access, and SSH would require a bastion host or VPN; moreover, this method does not provide a direct interactive session for volatile data collection.

Full explanation →
866
MCQmedium

Refer to the exhibit. A security engineer configured this S3 bucket policy to allow CloudTrail to deliver logs. However, logs are not being delivered. What is the MOST likely reason?

A.The Resource should be arn:aws:s3:::my-trail-bucket/*, not with AWSLogs prefix.
B.The Principal is set to a service, but must be an AWS account ID.
C.The Action should be s3:GetObject, not s3:PutObject.
D.The policy is missing s3:GetBucketAcl permission for CloudTrail.
AnswerD

CloudTrail needs GetBucketAcl to verify bucket ownership.

Why this answer

Option B is correct. The bucket policy must also grant the GetBucketAcl permission for CloudTrail to verify bucket ownership. Without s3:GetBucketAcl, CloudTrail cannot validate the bucket and will not deliver logs.

Option A is wrong because the Principal is correct. Option C is wrong because the action is PutObject, not GetObject. Option D is wrong because the resource pattern includes the prefix.

Full explanation →
867
MCQeasy

A company uses Amazon RDS for MySQL and wants to monitor database activity for security analysis. Which AWS service should be used to capture detailed database activity logs such as login attempts and query execution?

A.AWS CloudTrail
B.Amazon RDS Enhanced Monitoring
C.AWS Config
D.Amazon RDS Database Activity Streams
AnswerD

Database Activity Streams capture database-level activity such as SQL queries.

Why this answer

Option A is correct because Amazon RDS Enhanced Monitoring provides OS-level metrics, not database activity. Option B is correct because AWS CloudTrail logs API calls to RDS, not SQL queries. Option D is correct because AWS Config tracks configuration changes.

Option C is the correct answer because database activity streams capture detailed SQL-level activity.

Full explanation →
868
MCQmedium

A company runs a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The security team wants to protect the application from common web exploits such as SQL injection and cross-site scripting. Which AWS service should they use?

A.AWS Network Firewall
B.AWS WAF
C.AWS Firewall Manager
D.AWS Shield Advanced
AnswerB

AWS WAF can filter and monitor HTTP(S) requests for common attacks.

Why this answer

AWS WAF is a web application firewall that can protect against common web exploits. Option A is correct. Option B is for network firewall.

Option C is for DDoS protection at layer 3/4. Option D is for traffic inspection at the network level.

Full explanation →
869
MCQhard

An IAM policy attached to a user allows s3:GetObject on bucket 'my-bucket'. The user also has a service control policy (SCP) in the organization that denies s3:GetObject on all resources. The user attempts to download an object from 'my-bucket'. What is the outcome?

A.The request fails because the SCP explicitly denies the action.
B.The request succeeds because the IAM policy allows it.
C.The request fails because the SCP effect is 'Allow' and the IAM policy is 'Deny'.
D.The request succeeds because the user is in the management account.
AnswerA

Explicit deny in SCP overrides allow.

Why this answer

The request fails because AWS Organizations Service Control Policies (SCPs) act as a boundary for all accounts within the organization. An explicit deny in an SCP overrides any allow from an IAM policy, including those attached to the user. Since the SCP denies s3:GetObject on all resources, the user's IAM policy allowing the same action is effectively blocked, resulting in a failed request.

Exam trap

The trap here is that candidates often forget that SCPs apply to all accounts in the organization, including the management account, and that an explicit deny in an SCP overrides any allow from IAM policies, leading them to incorrectly assume the IAM policy alone determines the outcome.

How to eliminate wrong answers

Option B is wrong because it ignores the effect of the SCP; an explicit deny at the organization level overrides any allow from an IAM policy, so the request cannot succeed. Option C is wrong because it misstates the policy effects: the SCP effect is 'Deny' (not 'Allow'), and the IAM policy is 'Allow' (not 'Deny'), so the logic is reversed. Option D is wrong because being in the management account does not exempt a user from SCPs; SCPs apply to all accounts in the organization, including the management account, unless explicitly excluded.

Full explanation →
870
MCQeasy

A security engineer is investigating a potential security incident involving an Amazon RDS database. The engineer needs to determine if someone attempted to access the database with incorrect credentials. Which AWS service should the engineer use to view authentication failures?

A.Amazon CloudWatch Logs
B.VPC Flow Logs
C.Amazon RDS database logs (error logs)
D.AWS CloudTrail
AnswerC

RDS database logs contain authentication failure entries.

Why this answer

Option C is correct because RDS database logs (such as error logs) contain authentication failure entries. Option A is wrong because CloudTrail logs API calls to RDS, not database-level authentication. Option B is wrong because VPC Flow Logs show network traffic but not authentication attempts.

Option D is wrong because CloudWatch Logs can store RDS logs but the source is the database logs.

Full explanation →
871
Multi-Selectmedium

A company's security team is implementing an incident response plan for a potential ransomware attack on their EC2 instances. Which THREE steps should the team take to preserve forensic evidence while containing the incident?

Select 3 answers
A.Create an EBS snapshot of the root volume.
B.Create an Amazon Machine Image (AMI) of the compromised instance.
C.Isolate the instance by modifying the security group to deny all traffic.
D.Stop the instance to preserve its state.
E.Delete the compromised instance immediately.
AnswersA, B, C

A snapshot preserves the root volume data.

Why this answer

Option A is correct because creating an EBS snapshot of the root volume preserves the exact disk state at the time of the incident, including any ransomware artifacts, file system metadata, and encryption keys. This snapshot can be used for offline forensic analysis without altering the original evidence, as it captures the block-level data of the volume.

Exam trap

The trap here is that candidates often confuse 'stopping' an instance with 'preserving state,' but stopping triggers a graceful shutdown that can alter evidence, whereas an EBS snapshot captures the live disk state without halting the instance.

Full explanation →
872
MCQeasy

A company wants to centralize logs from multiple AWS accounts into a single S3 bucket for analysis. The accounts are part of an AWS Organizations organization. Which set of steps will accomplish this?

A.Create an organization trail in the management account with logging enabled for all accounts.
B.Use AWS Config to aggregate logs from all accounts into a central S3 bucket.
C.Create a CloudTrail trail in each account and configure each to write to the same S3 bucket.
D.Set up Amazon Kinesis Data Firehose in each account to stream logs to a central S3 bucket.
AnswerA

An organization trail automatically applies to all accounts in the organization and delivers logs to a single bucket.

Why this answer

AWS CloudTrail supports organization trails that log all accounts in the organization. A single trail can be created in the management account that delivers logs to a centralized S3 bucket.

Full explanation →
873
Multi-Selecteasy

Which TWO AWS services can be used to encrypt data at rest in an Amazon S3 bucket? (Choose two.)

Select 2 answers
A.SSL/TLS
B.Client-side encryption
C.SSE-KMS
D.SSE-S3
E.AWS Shield
AnswersC, D

AWS KMS provides managed keys for encryption.

Why this answer

Options A and B are correct. Server-Side Encryption with S3-Managed Keys (SSE-S3) and Server-Side Encryption with AWS KMS (SSE-KMS) are both options for encrypting data at rest. Option C (Client-side encryption) is also valid but is not an AWS service; it's done by the client.

Option D (SSL/TLS) is for transit. Option E (AWS Shield) is for DDoS protection.

Full explanation →
874
MCQeasy

Your company has a serverless application using AWS Lambda, Amazon API Gateway, and Amazon DynamoDB. The security team enabled AWS CloudTrail and Amazon GuardDuty. GuardDuty generates a finding 'Recon:EC2/PortProbeUnprotectedPort' for an EC2 instance that does not exist in the account. Upon investigation, you realize that the finding is triggered by a misconfigured Network Load Balancer (NLB) that is exposing a port to the internet. The NLB is used by the API Gateway. You need to reduce false positives for this specific finding. What should you do?

A.Change the NLB to an Application Load Balancer.
B.Enable AWS Shield Advanced to block the probes.
C.Disable GuardDuty for the account.
D.Create a suppression rule in GuardDuty to filter out findings for the NLB's public IP and port.
AnswerD

Suppression rules allow filtering of known false positives.

Why this answer

Option D is correct because GuardDuty suppression rules allow you to filter out findings that are known false positives based on specific criteria, such as the public IP and port of the NLB. Since the NLB is intentionally exposing a port for API Gateway, the port probe finding is expected behavior, not a real threat. Suppressing findings for that specific combination reduces noise without disabling GuardDuty for the entire account.

Exam trap

The trap here is that candidates may think changing the load balancer type or adding DDoS protection will stop the probes, but GuardDuty detects the probe activity itself, not the vulnerability—so only suppression rules can prevent the false positive without disabling the service.

How to eliminate wrong answers

Option A is wrong because changing the NLB to an Application Load Balancer does not address the root cause—the exposed port—and ALBs also have public IPs that can be probed, potentially generating similar findings. Option B is wrong because AWS Shield Advanced is a DDoS protection service that does not suppress or filter GuardDuty findings; it mitigates volumetric attacks but does not prevent port probe detections. Option C is wrong because disabling GuardDuty entirely would remove all threat detection capabilities for the account, which is an overreaction to a single false positive and violates security best practices.

Full explanation →
875
MCQmedium

A company uses Amazon GuardDuty and wants to suppress low-severity findings that are known false positives. What is the recommended approach?

A.Configure a CloudWatch Events rule to ignore the findings
B.Manually delete the findings from the GuardDuty console
C.Disable the GuardDuty detector for the affected accounts
D.Create a GuardDuty filter to suppress the findings
AnswerD

Filters can suppress findings from appearing in the console.

Why this answer

GuardDuty filters allow you to automatically suppress low-severity findings that are known false positives by setting the filter action to 'ARCHIVE'. This prevents the findings from appearing in the active findings list without disabling detection or deleting data. Filters are the recommended approach because they are purpose-built for this use case and preserve the audit trail.

Exam trap

The trap here is that candidates confuse GuardDuty filters (which archive findings) with CloudWatch Events rules (which only trigger downstream actions) or assume that manual deletion is acceptable, when in fact AWS recommends using filters to handle false positives without losing visibility.

How to eliminate wrong answers

Option A is wrong because CloudWatch Events rules can trigger actions based on GuardDuty findings but cannot suppress or archive them; they only react to findings after they are generated. Option B is wrong because manually deleting findings from the GuardDuty console is a temporary, non-scalable workaround that does not prevent the same findings from reappearing and violates the principle of preserving forensic evidence. Option C is wrong because disabling the GuardDuty detector for affected accounts stops all threat detection entirely, which is excessive and defeats the purpose of monitoring for actual threats.

Full explanation →
876
Multi-Selecthard

Which TWO AWS services can be used to automatically block malicious IP addresses at the network perimeter? (Select TWO.)

Select 2 answers
A.Amazon Route 53
B.Security Groups
C.Network ACLs
D.AWS WAF
E.AWS Shield Advanced
AnswersC, D

Network ACLs can deny inbound traffic from specific IPs.

Why this answer

Network ACLs (NACLs) are stateless virtual firewalls that operate at the subnet level in a VPC. They can be configured with inbound and outbound rules to explicitly deny traffic from specific IP addresses, effectively blocking malicious IPs at the network perimeter before they reach the instances.

Exam trap

The trap here is that candidates often confuse Security Groups with Network ACLs, thinking Security Groups can block traffic at the network perimeter, but Security Groups are instance-level and cannot block traffic before it enters the subnet.

Full explanation →
877
MCQmedium

A security engineer is implementing automated incident response. The engineer wants to use AWS Lambda to automatically remediate GuardDuty findings. What is the recommended pattern to trigger the Lambda function?

A.Configure an Amazon EventBridge rule to match GuardDuty findings and invoke the Lambda function.
B.Subscribe the Lambda function to an SNS topic that GuardDuty publishes findings to.
C.Use CloudWatch Logs subscription filter to trigger Lambda on GuardDuty log entries.
D.Have the Lambda function poll the EC2 instance metadata for threat indicators.
AnswerA

EventBridge is the recommended way to route GuardDuty findings to Lambda for automated remediation.

Why this answer

Amazon EventBridge is the recommended pattern because it natively integrates with AWS GuardDuty to receive all finding events in near real-time. By configuring an EventBridge rule that matches GuardDuty finding types (e.g., 'UnauthorizedAccess:EC2/SSHBruteForce'), you can directly invoke a Lambda function for automated remediation without polling or intermediate services. This pattern is serverless, event-driven, and follows AWS best practices for decoupled incident response.

Exam trap

The trap here is that candidates may assume GuardDuty uses SNS or CloudWatch Logs for output, similar to other AWS services, but GuardDuty exclusively emits findings as EventBridge events, making EventBridge the only native and recommended trigger pattern for Lambda remediation.

How to eliminate wrong answers

Option B is wrong because GuardDuty does not publish findings directly to SNS topics; it sends findings to EventBridge or can be configured to send to SNS via EventBridge, but direct subscription is not supported. Option C is wrong because GuardDuty does not write findings to CloudWatch Logs; findings are sent as events to EventBridge, not as log entries. Option D is wrong because EC2 instance metadata does not contain threat indicators from GuardDuty; it only provides instance-specific metadata like IP address or IAM role, and polling it would be an anti-pattern for event-driven remediation.

Full explanation →
878
MCQhard

A company has a VPC with multiple subnets and uses VPC Flow Logs to capture network traffic. The security team notices that some expected traffic is not appearing in the logs. What is a likely cause?

A.Flow Logs are published to an S3 bucket instead of CloudWatch Logs.
B.The traffic uses UDP protocol.
C.The traffic is blocked by a security group rule.
D.The traffic is to or from the Amazon DNS server (169.254.169.253).
AnswerD

By default, Flow Logs do not record traffic to the Amazon DNS server.

Why this answer

Option B is correct because Flow Logs do not capture traffic to the Amazon DNS server (unless you specifically enable that). Option A is wrong because Flow Logs can be published to CloudWatch Logs. Option C is wrong because Flow Logs capture accepted traffic even if it is rejected later.

Option D is wrong because Flow Logs capture all IP traffic, not just TCP.

Full explanation →
879
MCQhard

Refer to the exhibit. An IAM policy is attached to a group. A user in the group accesses the S3 bucket from an IP address 203.0.113.5 using HTTPS. What will be the result?

A.The user will be denied access because the source IP is not in the allowed ranges.
B.The user can access objects because an Allow with conditions grants access by default.
C.The user will be denied access because the policy does not allow the action explicitly.
D.The user can access objects because the condition for SecureTransport is met.
AnswerA

IP not in allowed ranges.

Why this answer

Option D is correct. The policy allows only from 192.0.2.0/24 and 198.51.100.0/24. The user's IP 203.0.113.5 does not match, so access is denied even though HTTPS is used.

Option A is wrong because the IP is not within allowed ranges. Option B is wrong because the condition is AND; all conditions must be met. Option C is wrong because the action is explicitly allowed only under conditions.

Full explanation →
880
Multi-Selectmedium

A company is implementing a data retention policy for CloudTrail logs. The logs are stored in an S3 bucket. The policy requires that logs be retained for 7 years and then automatically deleted. Which TWO actions should the security engineer take to meet this requirement?

Select 2 answers
A.Use AWS Backup to manage retention and deletion.
B.Enable S3 Object Lock in compliance mode on the bucket.
C.Configure the S3 bucket policy to deny s3:DeleteObject actions for all principals.
D.Enable S3 Versioning and create a lifecycle policy to delete noncurrent versions.
E.Create an S3 Lifecycle policy that expires objects after 2555 days (7 years).
AnswersC, E

This prevents accidental deletion of logs before the retention period expires.

Why this answer

Combining S3 lifecycle expiration with object lock or bucket policy is not needed. The simplest is to use S3 lifecycle policy to expire objects after 7 years. Option D ensures that logs are not deleted prematurely before the retention period ends.

Full explanation →
881
Multi-Selectmedium

A company uses AWS Organizations and wants to restrict the use of specific instance types across all accounts. Which TWO actions should be taken to enforce this restriction?

Select 2 answers
A.Restrict instance types at the VPC level using network ACLs.
B.Use AWS CloudTrail to monitor instance launches and send alerts.
C.Apply a Service Control Policy (SCP) that denies ec2:RunInstances with noncompliant instance types.
D.Create an IAM role that denies launch of noncompliant instances.
E.Use AWS Config rules to detect and automatically stop noncompliant instances.
AnswersC, E

SCPs centrally deny actions across accounts.

Why this answer

Options B and D are correct. SCPs can deny actions based on instance type, and AWS Config can detect noncompliant instances. Option A is wrong because IAM roles do not restrict resource types.

Option C is wrong because CloudTrail does not enforce. Option E is wrong because VPC does not relate to instance types.

Full explanation →
882
MCQeasy

A security analyst needs to detect and alert on suspicious API calls in real time. Which combination of AWS services should be used?

A.AWS CloudTrail, Amazon CloudWatch Logs, and Amazon EventBridge.
B.Amazon Inspector and AWS CloudTrail.
C.Amazon GuardDuty and AWS Lambda.
D.AWS Config and Amazon SNS.
AnswerA

Correct combination for real-time alerting on API calls.

Why this answer

AWS CloudTrail captures API calls and delivers log files to Amazon CloudWatch Logs, where you can define metric filters to detect suspicious patterns. Amazon EventBridge then consumes those filtered log events to trigger real-time alerts or automated remediation actions. This combination provides the end-to-end pipeline needed for real-time detection and alerting on API activity.

Exam trap

The trap here is that candidates often assume GuardDuty alone can provide real-time API call alerts, but GuardDuty findings are based on aggregated threat intelligence and behavioral analysis, not real-time per-API-call filtering, whereas CloudTrail plus CloudWatch Logs plus EventBridge gives you precise, real-time control over specific API actions.

How to eliminate wrong answers

Option B is wrong because Amazon Inspector is a vulnerability management service that scans workloads for software vulnerabilities and network exposure, not a real-time API call detection service. Option C is wrong because while Amazon GuardDuty can detect suspicious API activity using threat intelligence and anomaly detection, it does not natively provide real-time alerting on specific API calls; it generates findings that are typically evaluated asynchronously, and AWS Lambda alone cannot capture or filter API calls without a source like CloudTrail. Option D is wrong because AWS Config is a resource inventory and compliance service that tracks configuration changes, not API calls, and Amazon SNS is a notification service that requires a source of events (like CloudTrail and CloudWatch Logs) to deliver alerts.

Full explanation →
883
MCQhard

During an incident response, a security engineer needs to capture a forensic image of an EC2 instance's root volume for analysis. The instance is running and cannot be stopped. What is the recommended approach to capture the volume without stopping the instance?

A.Use the dd command via AWS Systems Manager to create a raw image and store it in S3.
B.Detach the volume from the instance, create a snapshot, and then attach it to a forensic analysis instance.
C.Create a snapshot while the volume is attached to the instance.
D.Use AWS Systems Manager to run a command that copies the volume content to S3.
AnswerB

Detaching ensures data consistency; snapshot captures the state for analysis.

Why this answer

Option B is correct because detaching the root volume from a running instance is not possible without stopping it first, but the recommended approach is to create a snapshot of the attached volume while the instance is running, then use that snapshot to create a new volume and attach it to a forensic analysis instance. This ensures a point-in-time copy without halting the instance, preserving volatile data and minimizing disruption.

Exam trap

The trap here is that candidates may think detaching the volume from a running instance is possible (it is not for root volumes without stopping the instance), or they may confuse creating a snapshot as the final step rather than the intermediate step to obtain a forensic copy.

How to eliminate wrong answers

Option A is wrong because the dd command via AWS Systems Manager would require the volume to be unmounted or the instance to be stopped to avoid data corruption from concurrent writes, and storing a raw image in S3 is inefficient and not a standard forensic practice. Option C is wrong because creating a snapshot while the volume is attached is actually the correct first step, but the question asks for the full recommended approach to capture the volume for analysis, which includes using the snapshot to create a new volume and attach it to a forensic instance—not just taking the snapshot. Option D is wrong because AWS Systems Manager cannot directly copy volume content to S3 without first creating a snapshot or using a tool like dd, which would require the volume to be unmounted or the instance to be stopped to ensure consistency.

Full explanation →
884
MCQeasy

A company uses Amazon S3 to store sensitive documents. The security team wants to ensure that all objects are encrypted at rest using server-side encryption. Additionally, any attempt to upload an unencrypted object must be denied. What should the security team do?

A.Enable default encryption on the S3 bucket using SSE-S3.
B.Add an S3 bucket policy that requires encryption using the 's3:x-amz-server-side-encryption' condition key.
C.Add an S3 bucket policy that denies PutObject if the object is not encrypted using SSE-S3 or SSE-KMS.
D.Create an AWS Config rule to detect unencrypted objects and trigger a Lambda function to encrypt them.
AnswerC

Denying unencrypted uploads enforces encryption at upload time.

Why this answer

Option D is correct because an S3 bucket policy that denies PutObject if the object is not encrypted ensures that only encrypted objects can be uploaded. Option A is wrong because enabling default encryption does not prevent unencrypted uploads if the request explicitly sets encryption to none. Option B is wrong because AWS Config can detect but not deny the upload.

Option C is wrong because S3 does not have an 'encryption required' bucket policy; the correct approach is to deny unencrypted uploads.

Full explanation →
885
Multi-Selecteasy

Which TWO are valid ways to authenticate an IAM user?

Select 2 answers
A.SSL/TLS certificate
B.MFA token
C.Password
D.SSH key pair
E.Access keys (access key ID and secret access key)
AnswersC, E

Used for AWS Management Console access.

Why this answer

Options B and D are correct. Option A is wrong because SSL/TLS certificates are not used for IAM user authentication. Option C is wrong because SSH keys are used for EC2 instances, not IAM users.

Option E is wrong because passwords are used for the AWS Management Console, but access keys are for API/CLI.

Full explanation →
886
MCQeasy

A company uses AWS CloudTrail to log all API activity. The security team wants to ensure that any changes to CloudTrail configuration (e.g., disabling the trail, deleting the trail, modifying the log delivery) are detected immediately. They have created a CloudWatch Events rule to capture the event 'StopLogging' and send an SNS notification. During testing, the team stops the trail and does not receive the notification. The CloudWatch Events rule is configured with the correct event pattern. What should the team check?

A.Verify that the CloudTrail trail is logging management events.
B.Ensure that the event pattern includes the correct source and detail-type.
C.Confirm that the SNS topic subscription is confirmed.
D.Check the IAM role associated with the CloudWatch Events rule to ensure it has permissions to publish to the SNS topic.
AnswerD

The rule must assume a role with sns:Publish permission on the topic.

Why this answer

Option B is correct because CloudWatch Events rules require an IAM role to invoke the SNS topic. The role must have sns:Publish permissions. Option A is wrong because the trail is logging management events by default.

Option C is wrong because the event pattern is correct, but the target action fails. Option D is wrong because SNS topic subscriptions are for subscribers, not for publishing.

Full explanation →
887
MCQhard

A company is using AWS CloudTrail to monitor API activity. The security team wants to be alerted when an IAM user creates a new access key. Which CloudTrail event should be used to create a CloudWatch Events rule?

A.EnableMFADevice
B.UpdateAccessKey
C.UploadSigningCertificate
D.CreateAccessKey
AnswerD

This event is logged by CloudTrail when an access key is created.

Why this answer

The CreateAccessKey API call is the correct event for creating an access key. Option B is wrong because UpdateAccessKey modifies an existing key. Option C is wrong because UploadSigningCertificate is for uploads, not access keys.

Option D is wrong because EnableMFADevice is for MFA devices.

Full explanation →
888
MCQmedium

A company uses AWS KMS to encrypt data at rest in Amazon S3. The security team requires that all encryption keys be automatically rotated every year. Which solution meets this requirement?

A.Use an AWS managed key and enable automatic rotation.
B.Use a customer managed key with imported key material and enable automatic rotation.
C.Use a customer managed key and enable automatic rotation with a yearly rotation period.
D.Use an AWS managed key and manually rotate it every year.
AnswerC

Customer managed keys support automatic rotation with a configurable period (yearly).

Why this answer

Option C is correct because customer managed keys (CMKs) in AWS KMS support automatic rotation with a customizable rotation period, which can be set to 365 days (one year) to meet the security team's requirement. AWS managed keys, on the other hand, have a fixed automatic rotation period of every three years (1095 days) and cannot be adjusted, making them unsuitable for a yearly rotation mandate. By using a CMK with automatic rotation enabled and specifying a rotation period of one year, the company ensures that the encryption key material is rotated annually without manual intervention.

Exam trap

The trap here is that candidates often assume AWS managed keys can be configured for automatic rotation with a custom period, but in reality, AWS managed keys have a fixed three-year rotation schedule and cannot be adjusted, making customer managed keys the only option for yearly rotation.

How to eliminate wrong answers

Option A is wrong because AWS managed keys have a fixed automatic rotation period of approximately three years (1095 days) and do not allow customization to a yearly rotation period. Option B is wrong because customer managed keys with imported key material do not support automatic rotation; AWS KMS cannot rotate key material that was imported from an external source, so the security team would need to manually rotate the key. Option D is wrong because AWS managed keys cannot be manually rotated; they are managed entirely by AWS and do not provide a manual rotation capability, and even if manual rotation were possible, it would not meet the 'automatically rotated' requirement.

Full explanation →
889
MCQeasy

A startup company has a single AWS account and a few IAM users. The CEO wants to ensure that no one can delete an S3 bucket that contains critical data. The security engineer creates an IAM policy that denies s3:DeleteBucket for all users. However, the CEO later finds that the bucket was deleted by a user who had full administrator access. Why did the policy fail to prevent the deletion?

A.The root user deleted the bucket, which bypasses IAM policies.
B.A service control policy (SCP) is required to deny actions to all users.
C.An explicit deny cannot override an administrator policy.
D.The deny policy was not attached to the user.
AnswerD

If the deny policy is not attached, the user has full access.

Why this answer

Option B is correct. An explicit deny in an IAM policy overrides an allow, but if the user has an administrator policy that grants all actions, and the deny policy is also attached, the deny should work. However, if the user has a permissions boundary that allows the action, or if the deny policy is not correctly applied, it may fail.

But the most common reason is that the user had an AWS managed policy like AdministratorAccess, which does not include any explicit denies, so the deny policy should override. Wait, the question says the policy failed. The likely reason is that the deny policy was not attached to the user; the user still had full access.

Option A is wrong because explicit deny should work. Option C is wrong because SCPs don't apply to single account. Option D is wrong because root user is not a factor.

Full explanation →
890
Multi-Selectmedium

Which TWO actions should a security engineer take to ensure that Amazon GuardDuty can effectively monitor for suspicious activity in a VPC? (Choose two.)

Select 2 answers
A.Enable DNS query logging and publish to CloudWatch Logs.
B.Enable VPC Flow Logs and publish to CloudWatch Logs.
C.Enable CloudTrail data events for S3.
D.Enable S3 server access logs.
E.Enable AWS Config configuration history.
AnswersA, B

GuardDuty uses DNS logs for domain-based threat detection.

Why this answer

Option B is correct because GuardDuty can analyze VPC Flow Logs for network activity. Option C is correct because GuardDuty can analyze DNS logs for suspicious domain queries. Option A is incorrect because CloudTrail management events are already analyzed by GuardDuty, but enabling data events is not necessary.

Option D is incorrect because GuardDuty does not analyze Config history. Option E is incorrect because GuardDuty does not analyze S3 access logs directly.

Full explanation →
891
Multi-Selecthard

A company wants to encrypt data at rest for an Amazon RDS for MySQL DB instance. Which THREE options can be used to achieve this? (Choose THREE.)

Select 3 answers
A.Take a snapshot of the unencrypted instance, copy it with encryption, and restore.
B.Modify the DB instance to enable encryption after creation.
C.Create a read replica with encryption enabled, even if the source is unencrypted.
D.Enable encryption on an existing read replica of an encrypted source.
E.Enable encryption when creating the DB instance.
AnswersA, D, E

This is a valid method to encrypt an existing database.

Why this answer

RDS encryption at rest is enabled at launch using AWS KMS. You can also encrypt a copy of an unencrypted snapshot. Read replicas can have different encryption if you encrypt the snapshot.

However, you cannot enable encryption on an existing unencrypted instance directly; you must take a snapshot, copy it with encryption, and restore. Also, you can enable encryption on a read replica only if the source is encrypted. So three correct: enable encryption at launch, encrypt a snapshot copy, and encrypt a read replica if the source is encrypted? Actually, read replica of an unencrypted instance cannot be encrypted.

So options:

Full explanation →
892
MCQeasy

A company stores sensitive data in an Amazon S3 bucket. The security team requires that all data in transit between the company's on-premises data center and S3 be encrypted. Which solution meets this requirement?

A.Set up an IPsec VPN connection between the data center and AWS, and access S3 through the VPN.
B.Enable S3 Transfer Acceleration on the bucket.
C.Use HTTPS (TLS) endpoints when uploading objects to S3.
D.Use AWS PrivateLink to create a VPC endpoint for S3.
AnswerC

HTTPS encrypts data in transit between client and S3.

Why this answer

Option B is correct because using HTTPS (TLS) encrypts data in transit between the client and S3. Option A is wrong because S3 does not support IPsec VPN directly for object uploads. Option C is wrong because VPC endpoints encrypt traffic within AWS, but not the on-premises connection.

Option D is wrong because S3 Transfer Acceleration speeds up transfers but does not provide encryption; HTTPS is still needed.

Full explanation →
893
Multi-Selecthard

A security engineer is designing a secure VPC architecture for a web application that must be accessible from the internet. The application runs on EC2 instances in private subnets. Which THREE components are required to provide secure internet connectivity?

Select 3 answers
A.Public subnets with routes to the IGW
B.NAT Gateway in a public subnet
C.Virtual Private Gateway (VGW)
D.Transit Gateway
E.Internet Gateway (IGW) attached to the VPC
AnswersA, B, E

Public subnets host the NAT Gateway and possibly an ALB.

Why this answer

Options A, C, and D are correct. An Internet Gateway is needed for public subnets, a NAT Gateway in a public subnet provides outbound access for private instances, and public subnets host the NAT Gateway and potentially an ALB. Option B is wrong because a Virtual Private Gateway is for VPN connections.

Option E is wrong because a Transit Gateway is not required.

Full explanation →
894
MCQhard

A company uses AWS Organizations with SCPs. The security team wants to ensure that no IAM user can be created without MFA. Which SCP should be applied at the root OU?

A.Deny iam:CreateUser unconditionally
B.Use an IAM policy to require MFA for API calls
C.Deny iam:CreateUser unless the request includes a condition for MFA
D.Attach an IAM policy to all users requiring MFA
AnswerC

This SCP denies creation of users without MFA requirement.

Why this answer

Option C is correct because it uses a Service Control Policy (SCP) to deny the `iam:CreateUser` action unless the request includes a condition that MFA is present. SCPs are account-level permission boundaries in AWS Organizations, and this approach ensures that no IAM user can be created without MFA across all accounts in the organization, as SCPs are evaluated before any IAM policies.

Exam trap

The trap here is that candidates confuse SCPs with IAM policies, thinking an IAM policy can enforce MFA at the root OU level, but SCPs are the only mechanism that can apply organization-wide restrictions on actions like `iam:CreateUser`.

How to eliminate wrong answers

Option A is wrong because unconditionally denying `iam:CreateUser` would prevent all user creation, including those with MFA, which does not meet the requirement of allowing MFA-enabled users. Option B is wrong because an IAM policy requiring MFA for API calls only controls access to existing users and does not prevent the creation of users without MFA; it also cannot be applied at the root OU level as SCPs are needed. Option D is wrong because attaching an IAM policy to all users requiring MFA is an account-level action that does not prevent the creation of new users without MFA, and it cannot be enforced across all accounts via the root OU.

Full explanation →
895
Multi-Selecthard

A security engineer is configuring an AWS WAF web ACL for an Application Load Balancer. The engineer wants to block requests that contain cross-site scripting (XSS) and also limit the rate of requests from a single IP. Which THREE rule groups should be added?

Select 3 answers
A.AWS Managed Rules - IP reputation rule group
B.Rate-based rule
C.AWS Managed Rules - SQL injection rule group
D.AWS Managed Rules - Cross-site scripting (XSS) rule group
E.Geographic match rule
AnswersB, C, D

Rate-based rules limit the number of requests from an IP over a time period.

Why this answer

Options A, C, and E are correct. The AWS Managed Rules for XSS (A) and Rate-based rules (C) address the requirements, and the SQL injection rule group (E) is commonly included for comprehensive protection. Option B is wrong because an IP set rule allows/denies specific IPs, not rate limiting.

Option D is wrong because geographic match rules are for location-based blocking, not behavior.

Full explanation →
896
MCQeasy

A company wants to detect and alert on unauthorized API calls in their AWS account. Which AWS service can provide real-time notifications when specific API calls are made?

A.AWS Config
B.Amazon CloudWatch Events (EventBridge)
C.Amazon GuardDuty
D.AWS Trusted Advisor
AnswerB

EventBridge can react to CloudTrail events in real time.

Why this answer

Option B is correct because CloudWatch Events (now Amazon EventBridge) can match patterns in CloudTrail events and trigger notifications. Option A is incorrect because AWS Config evaluates resource configurations, not API calls. Option C is incorrect because AWS Trusted Advisor provides recommendations, not real-time alerts.

Option D is incorrect because Amazon GuardDuty focuses on threat detection, not specific API call patterns.

Full explanation →
897
Multi-Selecthard

A security team is implementing automated response to AWS GuardDuty findings. Which THREE actions should be taken to ensure proper incident response?

Select 3 answers
A.Create an AWS Lambda function that automatically modifies the security group of the affected instance to block all traffic.
B.Tag the affected instance with a 'quarantine' tag for tracking.
C.Create a snapshot of the EBS volumes attached to the instance for forensic analysis.
D.Terminate the affected instance immediately to neutralize the threat.
E.Disable AWS CloudTrail to prevent further logging of malicious activity.
AnswersA, B, C

Containment action.

Why this answer

Option A is correct because isolating the affected instance by modifying its security group to block all traffic is a common containment strategy that stops malicious network activity without destroying evidence. This approach allows the security team to perform forensic analysis and remediation while preventing further compromise, aligning with AWS incident response best practices.

Exam trap

The trap here is that candidates may think immediate termination (Option D) is the fastest way to neutralize a threat, but AWS incident response frameworks emphasize containment and evidence preservation over destruction.

Full explanation →
898
Multi-Selectmedium

A company needs to implement a cross-account access strategy where users in Account A can assume a role in Account B. Which TWO steps are necessary? (Choose TWO.)

Select 2 answers
A.Attach an IAM policy to the users or groups in Account A that allows sts:AssumeRole targeting the role ARN in Account B.
B.Create an IAM user in Account B with the same name as the users in Account A.
C.Enable MFA for all users in Account A.
D.Attach a resource-based policy to the IAM role in Account B.
E.Create an IAM role in Account B with a trust policy that allows Account A to assume the role.
AnswersA, E

Grants users permission to assume the role.

Why this answer

Options A and D are correct: the trust policy in Account B allows Account A to assume the role, and users in Account A need permission to call sts:AssumeRole. Option B is unnecessary. Option C is for resource-based policies.

Option E is not required.

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899
Multi-Selectmedium

Which TWO actions are valid ways to grant an IAM user access to an S3 bucket owned by another AWS account? (Choose TWO.)

Select 2 answers
A.Have the user assume an IAM role in the bucket-owning account with appropriate permissions.
B.Create a bucket policy that grants access to the user's AWS account.
C.Attach an IAM policy to the user in their own account allowing access to the bucket.
D.Add the user's ARN to the bucket's ACL.
E.Use an S3 access point with a policy that allows the user.
AnswersA, B

Cross-account role assumption grants temporary access.

Why this answer

Correct answers are B and C. Bucket policies allow cross-account access when the bucket policy grants access to the user's account, and the user must have explicit permission. ACLs are legacy but can grant cross-account access.

Role assumption is also valid.

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900
MCQmedium

A security engineer is reviewing the CloudTrail configuration for a trail named 'management-trail'. The engineer needs to ensure that all S3 object-level operations in the bucket 'my-bucket' are logged. What is the issue with the current configuration?

A.The ReadWriteType is set to 'All', which does not include write events.
B.The 'Values' field should end with a '/*' to capture all objects under the prefix.
C.The IncludeManagementEvents should be set to false to focus on data events.
D.The trail should be configured as a multi-region trail to capture all regions.
AnswerB

Without '/*', only the prefix itself is logged, not objects.

Why this answer

Option B is correct because the 'DataResources' value should include a trailing '/*' to indicate all objects under the prefix. Option A is incorrect because the ReadWriteType is 'All', which covers both read and write. Option C is incorrect because the event selector includes management events.

Option D is incorrect because the trail is not necessarily multi-region from this output.

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