CLF-C02 Cloud Technology and Services Practice Test 7 — 15 Questions

Question 1

A mobile gaming company is developing a real-time multiplayer game that requires ultra-low latency (under 10 milliseconds) for player interactions. The company expects most of its users to be on 5G mobile networks. To meet the latency requirement, the company needs to deploy compute and storage resources as close as possible to the mobile subscribers, directly at the edge of the telecommunications network. Which AWS service should the company use?

Accepted Answer

AWS Wavelength. AWS Wavelength is the correct choice because it embeds AWS compute and storage services directly at the edge of 5G telecommunications networks, enabling ultra-low latency (under 10 ms) for mobile subscribers. This allows the gaming company to process player interactions within the carrier's network, minimizing the round-trip time between the mobile device and the application server.

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AWS Local Zones

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AWS Outposts

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Amazon CloudFront Edge Locations

Question 2

A company is developing a microservices application on AWS. The application has multiple independent services that must communicate asynchronously. The company needs a fully managed service to reliably store and deliver messages between these services, ensuring that each message is processed at least once and allowing the services to scale independently. Which AWS service should the company use?

Accepted Answer

Amazon Simple Queue Service (SQS). Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables asynchronous communication between microservices. It reliably stores messages in queues and ensures each message is delivered at least once, allowing services to poll and process messages independently, which supports decoupling and independent scaling.

Answer

Amazon Simple Notification Service (SNS)

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Amazon MQ

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Amazon Kinesis Data Streams

Question 3

An e-commerce company runs a MySQL database on-premises to support its transactional workload. The company plans to migrate this database to AWS to reduce operational overhead. The company requires a fully managed database solution that automatically replicates data across multiple Availability Zones to provide failover in the event of an Availability Zone failure. The company does not want to manage database patching, backup scheduling, or replication. Which AWS service should the company use to meet these requirements?

Accepted Answer

Amazon RDS with Multi-AZ deployment. Amazon RDS with Multi-AZ deployment is the correct choice because it provides a fully managed MySQL database that automatically replicates data synchronously across multiple Availability Zones, enabling automatic failover in the event of an AZ failure. AWS handles patching, backup scheduling, and replication management, meeting the company's requirement to reduce operational overhead.

Answer

Amazon DynamoDB

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Amazon EC2 with a self-managed MySQL installation

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Amazon Redshift

Question 4

A company is building a serverless web application using AWS Lambda for compute. The application needs to expose RESTful API endpoints that allow users to perform CRUD operations on a database. The API must support authentication using API keys, throttle requests to prevent abuse, and validate incoming request payloads before they reach the Lambda functions. The company wants a fully managed service that handles these API management tasks and integrates directly with AWS Lambda. Which AWS service should the company use?

Accepted Answer

Amazon API Gateway. Amazon API Gateway is a fully managed service that handles RESTful API creation, authentication via API keys, request throttling to prevent abuse, and request payload validation before invoking AWS Lambda functions. It integrates natively with Lambda, making it the ideal choice for serverless web applications requiring CRUD operations with built-in API management.

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Amazon CloudFront

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Application Load Balancer

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AWS Step Functions

Question 5

A company plans to deploy a multi-tier web application on AWS. The architecture includes Amazon EC2 instances for the web and application tiers, an Application Load Balancer for traffic distribution, and an Amazon RDS database for the data tier. The company wants to automate the provisioning and configuration of all these AWS resources in a repeatable and predictable manner. The solution should allow the infrastructure definition to be stored in a version control system and be used to create identical environments for development, testing, and production with minimal manual effort. Which AWS service should the company use to define and manage the infrastructure as code?

Accepted Answer

AWS CloudFormation. AWS CloudFormation is the correct service because it enables you to define your entire multi-tier infrastructure—EC2 instances, Application Load Balancer, and RDS database—as a declarative JSON or YAML template. This template can be stored in a version control system and used to provision identical environments across development, testing, and production with a single API call, ensuring repeatability and predictability.

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AWS Elastic Beanstalk

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AWS OpsWorks

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AWS CodeDeploy

Question 6

A company runs a legacy on-premises file server that stores 10 TB of shared documents used by a team of 50 employees. The company wants to migrate this data to Amazon S3 to benefit from durable, scalable storage. However, the team requires low-latency access to frequently used files (less than 5 milliseconds latency) because the application reads and writes files multiple times per second. The company also wants to maintain a local cache of recently accessed files on premises to reduce latency and minimize egress costs. The entire solution should be managed through the AWS Management Console and support standard file-sharing protocols like SMB. Which AWS service should the company use to meet these requirements?

Accepted Answer

AWS Storage Gateway File Gateway. AWS Storage Gateway File Gateway is the correct choice because it provides a hybrid cloud storage service that enables low-latency, on-premises access to frequently used files by maintaining a local cache of recently accessed data. It supports the SMB protocol for standard file sharing, integrates with Amazon S3 for durable, scalable storage, and can be managed through the AWS Management Console. The local cache reduces both latency (targeting sub-5 ms for cached data) and egress costs by serving reads from the on-premises cache instead of fetching from S3.

Answer

Amazon FSx for Windows File Server

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AWS DataSync

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Amazon S3 with AWS Direct Connect

Question 7

A company runs a large fleet of Amazon EC2 instances across multiple environments (development, test, production). The security team requires a centralized, automated solution to apply operating system security patches on a regular schedule (e.g., every Tuesday at 2 AM). The solution must generate compliance reports showing which instances are patched and which are missing patches. The company wants a managed AWS service that works without requiring SSH or RDP access to the instances and does not require installing any custom agents. Which AWS service should the company use to meet these requirements?

Accepted Answer

AWS Systems Manager Patch Manager. AWS Systems Manager Patch Manager is a managed service that automates the process of patching managed nodes with both security-related and other types of updates. It can be configured to run on a schedule (e.g., every Tuesday at 2 AM) using a Systems Manager maintenance window, and it generates compliance reports via Systems Manager Inventory and Compliance. Patch Manager works without requiring SSH or RDP access because it uses the AWS Systems Manager Agent (SSM Agent), which is pre-installed on many Amazon EC2 AMIs and can be installed without interactive logon, and it does not require custom agents beyond the SSM Agent itself.

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AWS Config

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Amazon Inspector

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AWS OpsWorks

Question 8

A company hosts an e-commerce website on Amazon EC2 instances behind an Application Load Balancer in the us-east-1 Region. The website includes both static assets (product images, CSS files) and dynamic content (user-specific cart data). The company has customers all over the world who complain about slow page load times. The company wants to reduce latency by caching static content closer to users while still allowing dynamic requests to reach the origin. Which AWS service should the company use to meet these requirements?

Accepted Answer

Amazon CloudFront with Application Load Balancer as the origin. Amazon CloudFront is a content delivery network (CDN) that caches static content (e.g., images, CSS) at edge locations worldwide, reducing latency for users. By configuring the Application Load Balancer as the origin, CloudFront forwards dynamic requests (e.g., cart data) to the ALB, which then routes them to the EC2 instances. This hybrid approach meets the requirement to cache static assets globally while allowing dynamic content to be processed by the origin servers.

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Amazon Route 53 with latency-based routing

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AWS Global Accelerator with static IP addresses

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Amazon S3 Transfer Acceleration

Question 9

A company runs a monolithic order processing application on a single Amazon EC2 instance. During peak hours, the instance receives a sudden burst of orders that exceeds its processing capacity. Orders are dropped and customers do not receive confirmations. The company needs a solution that buffers incoming orders, stores them durably, and allows the application to process them at a manageable pace. The solution must be fully managed and ensure that no orders are lost. Which AWS service should the company use to meet these requirements?

Accepted Answer

Amazon Simple Queue Service (SQS). Amazon Simple Queue Service (SQS) is a fully managed message queuing service that decouples application components. It durably stores incoming orders in a queue, allowing the EC2 instance to poll and process them at its own pace, preventing order loss during traffic bursts. SQS guarantees at-least-once delivery and provides a buffer that absorbs spikes in demand.

Answer

Amazon Simple Notification Service (SNS)

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Amazon Kinesis Data Firehose

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Amazon ElastiCache

Question 10

A company hosts a web application on Amazon EC2 instances in two AWS Regions: us-east-1 and eu-west-1. The application serves a global user base. The company wants to improve performance by directing users to the nearest healthy regional endpoint with minimal latency. Additionally, the company requires two static Anycast IP addresses that remain constant, representing the application entry point. The solution should automatically reroute traffic if a regional endpoint becomes unhealthy. Which AWS service should the company use?

Accepted Answer

AWS Global Accelerator. AWS Global Accelerator is correct because it uses the AWS global network and Anycast static IP addresses to route user traffic to the nearest healthy regional endpoint (EC2 instances in us-east-1 or eu-west-1). It automatically reroutes traffic if an endpoint becomes unhealthy, providing low latency and high availability for global users.

Answer

Amazon CloudFront

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Amazon Route 53

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AWS Shield

Question 11

A company is developing a mobile application that requires a database to store user session data and preferences. The data is accessed very frequently with low-latency requirements, and the access patterns are unpredictable – the application experiences sudden spikes in read and write traffic. The company wants a fully managed database service that automatically scales to handle the workload, requires no patching or server administration, and charges based on the throughput consumed rather than on provisioned capacity. Which AWS service meets these requirements?

Accepted Answer

Amazon DynamoDB. Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers single-digit millisecond latency at any scale. It supports on-demand capacity mode, which automatically scales to handle unpredictable traffic spikes and charges based on the actual reads and writes consumed, not on pre-provisioned throughput. This eliminates the need for patching, server administration, or capacity planning, matching all the stated requirements exactly.

Answer

Amazon RDS for MySQL

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Amazon Redshift

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Amazon EBS

Question 12

A company is migrating its on-premises infrastructure to AWS. The operations team needs a managed service that allows them to define their entire cloud environment—including VPCs, subnets, EC2 instances, and RDS databases—as a reusable template stored in version control. The service must automatically handle resource dependencies, such as creating the database before launching the application servers, and ensure that the infrastructure is provisioned consistently across multiple environments (e.g., development, staging, production). Which AWS service should the company use to meet these requirements?

Accepted Answer

AWS CloudFormation. AWS CloudFormation is the correct choice because it provides Infrastructure as Code (IaC) capabilities, allowing you to define your entire cloud environment—including VPCs, subnets, EC2 instances, and RDS databases—in a reusable JSON or YAML template stored in version control. It automatically manages resource dependencies using the DependsOn attribute and intrinsic functions like Ref and Fn::GetAtt, ensuring resources are created in the correct order (e.g., database before application servers). CloudFormation also supports consistent provisioning across multiple environments by using parameters, mappings, and stacksets, making it ideal for the operations team's requirements.

Answer

AWS Elastic Beanstalk

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AWS OpsWorks

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AWS CodeDeploy

Question 13

A company is developing a REST API that processes customer orders. The API receives JSON payloads via HTTPS and performs short-lived operations, such as data validation, transformation, and writing to a database. The workload is very unpredictable: sometimes there are long periods of inactivity, but during flash sales the API may receive thousands of requests per second for a few minutes. The company wants a fully managed compute service that automatically scales to handle any request volume, charges only for the compute time used during execution, and requires no server provisioning or ongoing infrastructure management. Which AWS service should the company use?

Accepted Answer

AWS Lambda. AWS Lambda is the correct choice because it is a fully managed, event-driven compute service that automatically scales from zero to thousands of concurrent executions in response to incoming HTTPS requests. It charges only for the compute time consumed during execution (in 1ms increments), requires no server provisioning, and is ideal for short-lived operations like data validation, transformation, and database writes. The unpredictable, bursty workload pattern—long idle periods followed by flash sales—maps perfectly to Lambda's pay-per-use model and automatic scaling.

Answer

Amazon EC2 with Auto Scaling

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Amazon ECS with Fargate launch type

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Amazon Lightsail

Question 14

A company is designing a cloud architecture for a critical customer-facing application. The CTO requires that the architecture automatically recover from infrastructure failures without manual intervention. The solution must be able to withstand the failure of individual components, such as an Amazon EC2 instance or an entire Availability Zone. Which design principle from the AWS Well-Architected Framework's Reliability pillar should the company implement to meet this requirement?

Accepted Answer

Scale horizontally to increase aggregate system availability.. Scaling horizontally (adding more EC2 instances behind a load balancer) increases aggregate system availability because if one instance fails, traffic is redistributed to the remaining healthy instances. This design also supports multi-AZ deployments, allowing the application to survive an entire Availability Zone failure without manual intervention, which directly meets the CTO's requirement for automatic recovery.

Answer

Implement a monolithic architecture to reduce complexity and minimize points of failure.

Answer

Use a single large EC2 instance to minimize the number of components that could fail.

Answer

Test recovery procedures by simulating infrastructure failures in a staging environment.

Question 15

A company runs a microservices-based e-commerce application on AWS. During peak hours, the order processing service often gets overwhelmed because the web frontend sends requests directly to it. This causes delays and occasional failures. The architecture team needs to decouple the frontend from the order processing service by introducing a fully managed, highly available, and durable message queue. The queue must automatically replicate messages across multiple Availability Zones and allow the order processing service to pull messages at its own pace. Which AWS service should the company use?

Accepted Answer

Amazon Simple Queue Service (SQS). Amazon Simple Queue Service (SQS) is the correct choice because it is a fully managed, highly available, and durable message queue service that automatically replicates messages across multiple Availability Zones (AZs) to ensure fault tolerance. It decouples the web frontend from the order processing service, allowing the latter to poll and process messages at its own pace, which prevents overload during peak hours. SQS provides at-least-once delivery and supports standard queues with high throughput, making it ideal for this use case.

Answer

Amazon Simple Notification Service (SNS)

Answer

Amazon Kinesis Data Streams

Answer

Amazon MQ