CLF-C02 Practice Test 41 — 15 Questions

Question 1

A company's application has components that tightly depend on each other, making it difficult to scale individual components or update one without affecting others. The architects want to refactor to a more resilient architecture. What AWS design principle addresses this?

Accepted Answer

Implement loose coupling through asynchronous messaging between components. Option B is correct because loose coupling through asynchronous messaging (e.g., using Amazon SQS or Amazon SNS) decouples components so that they can scale independently and updates can be made to one component without affecting others. This directly addresses the tight dependency described in the question, where scaling or updating one component impacts the entire application. By introducing message queues or pub/sub patterns, components communicate indirectly, improving resilience and fault isolation.

Answer

Design for failure by adding redundant instances

Answer

Use larger instance types to handle all components on fewer servers

Answer

Enable AWS Auto Scaling to handle traffic variability

Question 2

Which AWS service or feature provides a notification when AWS is performing planned maintenance that may affect your resources?

Accepted Answer

AWS Health Dashboard. AWS Health Dashboard (specifically the AWS Personal Health Dashboard) provides proactive notifications and alerts when AWS is performing planned maintenance that may affect your resources. It gives you a personalized view of service health events, including scheduled maintenance, that are relevant to your AWS account and resources.

Answer

Amazon CloudWatch Alarms

Answer

AWS Trusted Advisor

Answer

AWS Config

Question 3

Which Amazon RDS feature enables automatic scaling of database storage capacity without any downtime when storage is running low?

Accepted Answer

RDS Storage Auto Scaling. RDS Storage Auto Scaling is the correct answer because it automatically increases the allocated storage for an RDS database instance when free space drops below a configured threshold, without requiring any downtime or manual intervention. This feature uses a scaling policy that triggers a storage increase in predefined increments, ensuring the database remains available and performant during storage growth.

Answer

RDS Multi-AZ

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RDS Read Replicas

Answer

RDS Automated Backups

Question 4

A company has 10 EC2 On-Demand instances running. They purchase a 1-year Compute Savings Plan for a commitment equivalent to 6 instances. What happens to the remaining 4 instances' cost?

Accepted Answer

The remaining 4 instances are charged at On-Demand rates. A Compute Savings Plan applies to any EC2 instance usage up to the committed hourly amount (in this case, equivalent to 6 instances). Usage beyond that commitment is charged at standard On-Demand rates. Therefore, the remaining 4 instances are billed at On-Demand prices because the Savings Plan does not cover usage exceeding the commitment.

Answer

The remaining 4 instances are free since the Savings Plan covers all usage

Answer

The remaining 4 instances are charged at Spot Instance rates

Answer

AWS suspends the 4 excess instances to enforce the Savings Plan limit

Question 5

Which AWS service enables no-code integration between SaaS applications (like Salesforce, ServiceNow, Zendesk) and AWS services for automated data flows?

Accepted Answer

Amazon AppFlow. Amazon AppFlow is the correct service because it is specifically designed for no-code integration between SaaS applications (such as Salesforce, ServiceNow, and Zendesk) and AWS services, enabling automated data flows without writing any code. It supports bi-directional data transfer, transformation, and filtering, making it ideal for syncing customer records or support tickets directly into Amazon S3 or Redshift.

Answer

AWS DataSync

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AWS Glue

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Amazon EventBridge

Question 6

A security team needs to demonstrate to auditors that no AWS infrastructure has been modified between two audit periods. Which AWS service provides a continuous record of configuration changes with before-and-after state for all resources?

Accepted Answer

AWS Config. AWS Config is the correct service because it continuously records configuration changes to AWS resources and provides a detailed history of each change, including the before-and-after state. This allows the security team to demonstrate to auditors that no infrastructure modifications occurred between two audit periods by reviewing the configuration timeline and compliance snapshots.

Answer

AWS CloudTrail

Answer

Amazon CloudWatch

Answer

Amazon GuardDuty

Question 7

A company stores genomics data (several petabytes) on Amazon S3. They need to run complex analytics on this data using standard bioinformatics tools that require a POSIX file system interface. Which AWS solution provides this?

Accepted Answer

Amazon FSx for Lustre linked to S3. Amazon FSx for Lustre is a high-performance file system that provides a POSIX-compliant interface and can be linked directly to an S3 bucket, allowing you to run standard bioinformatics tools on genomics data stored in S3 without needing to copy it. This solution delivers the low-latency, high-throughput file access required for complex analytics on petabyte-scale datasets, while seamlessly integrating with S3 for durable storage.

Answer

Amazon EFS mounted on EC2

Answer

Amazon EBS io2 volumes on EC2

Answer

Amazon S3 with S3 Select

Question 8

A company is calculating the Total Cost of Ownership (TCO) for migrating to AWS vs. staying on-premises. Which costs are typically REDUCED when migrating to AWS?

Accepted Answer

Physical hardware, data center facilities, and infrastructure management costs. AWS TCO analysis typically shows reduction in: hardware acquisition and depreciation (no physical servers), data center facility costs (power, cooling, space), hardware maintenance and support contracts, and staff time for infrastructure management. AWS shifts these from fixed capital costs to variable operational costs, and eliminates many administrative tasks that managed services handle automatically.

Answer

Software licensing costs always decrease when moving to AWS

Answer

Developer salaries and application development costs

Answer

Data transfer costs are eliminated in the cloud

Question 9

Which statement best describes 'high availability' in the context of AWS cloud architecture?

Accepted Answer

A design that minimizes downtime by eliminating single points of failure and enabling automatic recovery. High availability in AWS is achieved by designing architectures that eliminate single points of failure and enable automatic recovery, typically using services like Elastic Load Balancing (ELB) to distribute traffic across multiple Availability Zones (AZs) and Auto Scaling to replace failed instances. This ensures that if one component fails, another takes over seamlessly, minimizing downtime. Option B correctly captures this core principle of fault tolerance and automated failover.

Answer

The ability to handle any amount of traffic by adding more resources

Answer

Using the largest available instance types for maximum performance

Answer

Storing multiple copies of data in Amazon S3

Question 10

A company wants to receive a notification whenever a new AWS root account sign-in occurs. Which combination of services achieves this?

Accepted Answer

CloudTrail + EventBridge + SNS notification. AWS CloudTrail logs all root account sign-in events as `ConsoleLogin` events in the management events trail. Amazon EventBridge can be configured with a rule that matches this specific event pattern (e.g., `detail.userIdentity.type` = `Root` and `detail.eventName` = `ConsoleLogin`). The rule then triggers an Amazon SNS topic to send a notification (email, SMS, etc.) to the designated recipients. This combination provides a real-time, event-driven notification for root account activity.

Answer

AWS Config + AWS Lambda

Answer

AWS Budgets + SES email

Answer

Amazon GuardDuty finding + S3 export

Question 11

Which statement about AWS pricing is accurate?

Accepted Answer

AWS offers pay-as-you-go pricing with volume discounts as usage grows. AWS pricing is accurate as pay-as-you-go with volume discounts because customers only pay for the resources they consume, and as usage increases, tiered pricing or volume-based discounts (e.g., AWS Lambda's per-request pricing or S3's storage tiers) automatically reduce the per-unit cost. This model eliminates upfront commitments and aligns cost with actual consumption, which is a core AWS pricing philosophy.

Answer

AWS prices are fixed and never change

Answer

AWS requires annual contracts for all services

Answer

Data transfer into AWS from the internet is the largest AWS cost component

Question 12

Which AWS offering provides free, self-paced online training courses, videos, and labs to help customers learn AWS services and pass certification exams?

Accepted Answer

AWS Skill Builder. AWS Skill Builder is the official AWS training portal that offers free, self-paced online training courses, videos, and hands-on labs. It is specifically designed to help individuals learn AWS services and prepare for AWS Certification exams, including the CLF-C02. Unlike other options, Skill Builder directly provides the described learning resources at no cost.

Answer

AWS Partner Network (APN)

Answer

AWS Certification

Answer

AWS Marketplace

Question 13

Which AWS service provides managed, automated workflows for coordinating migration tasks such as tracking migration status, grouping servers into migration waves, and coordinating cutover?

Accepted Answer

AWS Migration Hub. AWS Migration Hub is the correct service because it provides a single location to track the progress of application migrations across multiple AWS and partner solutions. It offers managed, automated workflows for grouping servers into migration waves, tracking migration status, and coordinating cutover activities, which directly matches the question's requirements.

Answer

AWS Application Discovery Service

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AWS Control Tower

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AWS Organizations

Question 14

Under the AWS Shared Responsibility Model, what is AWS responsible for when a customer uses AWS Lambda?

Accepted Answer

Managing the underlying OS, runtime, and execution environment. AWS Lambda is a serverless compute service where AWS manages the underlying infrastructure, including the operating system, runtime environment, and execution environment. Under the Shared Responsibility Model, AWS is responsible for the security of the cloud, which for Lambda includes patching the runtime, managing the hypervisor, and ensuring the execution environment is isolated between customers. The customer is only responsible for the code and configuration they provide.

Answer

Writing the Lambda function code

Answer

Configuring IAM roles and permissions for Lambda functions

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Encrypting the data processed by the function

Question 15

A company needs a managed workflow service to coordinate long-running business processes that may require human approval steps and can run for up to one year. Which AWS service handles this?

Accepted Answer

AWS Step Functions (Standard Workflows). AWS Step Functions Standard Workflows are designed for long-running, durable, and auditable workflows that can run for up to one year, making them ideal for coordinating business processes that require human approval steps. They provide built-in error handling, retries, and state management, which are essential for orchestrating multi-step processes with human intervention.

Answer

AWS Lambda

Answer

Amazon SQS

Answer

Amazon EventBridge