CLF-C02 Cloud Technology and Services Practice Test 23 — 15 Questions

Question 1

Which AWS service provides a fully managed NoSQL database with single-digit millisecond latency at any scale?

Accepted Answer

Amazon DynamoDB. Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers consistent single-digit millisecond latency at any scale. It achieves this through its distributed architecture, automatic partitioning, and SSD-backed storage, making it ideal for high-traffic applications like gaming, ad tech, and IoT.

Answer

Amazon RDS

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Amazon ElastiCache

Answer

Amazon Redshift

Question 2

Which AWS service allows you to create a private network connection between your on-premises data center and AWS without using the public internet?

Accepted Answer

AWS Direct Connect. AWS Direct Connect is the correct answer because it provides a dedicated, private network connection from your on-premises data center directly to AWS, bypassing the public internet entirely. This is achieved through a physical cross-connect at an AWS Direct Connect location, using industry-standard 802.1Q VLANs to maintain traffic isolation. Unlike VPN-based solutions, Direct Connect offers consistent network performance, lower latency, and higher bandwidth, making it ideal for hybrid workloads and large-scale data transfers.

Answer

AWS VPN

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Amazon VPC Peering

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AWS Transit Gateway

Question 3

A developer wants to build a serverless application that responds to HTTP requests. Which combination of AWS services would be most appropriate?

Accepted Answer

Amazon API Gateway and AWS Lambda. Amazon API Gateway acts as a fully managed HTTP endpoint that receives and routes incoming requests to AWS Lambda functions, which execute the application logic without provisioning servers. This combination directly fulfills the requirement for a serverless application that responds to HTTP requests, as Lambda handles compute in a stateless, event-driven manner and API Gateway provides the HTTP interface with built-in features like throttling, authentication, and request validation.

Answer

Amazon EC2 and Elastic Load Balancing

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Amazon ECS and AWS Fargate

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AWS Elastic Beanstalk and Amazon RDS

Question 4

Which AWS service provides a petabyte-scale data transfer solution for moving large amounts of data into AWS when network transfer is not feasible?

Accepted Answer

AWS Snowball. AWS Snowball is a petabyte-scale data transport solution that uses physical storage devices to transfer large amounts of data into and out of AWS when network transfer is not feasible due to high latency, low bandwidth, or high costs. It is specifically designed for moving massive datasets (up to 80 TB per device) where network uploads would take weeks or months, making it the correct choice for this scenario.

Answer

AWS DataSync

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AWS Transfer Family

Answer

Amazon S3 Multipart Upload

Question 5

Which AWS service is used to distribute incoming application traffic across multiple EC2 instances to improve availability and fault tolerance?

Accepted Answer

Elastic Load Balancing. Elastic Load Balancing (ELB) automatically distributes incoming application traffic across multiple Amazon EC2 instances in one or more Availability Zones. By doing so, it increases the fault tolerance of your application because if one instance fails, the load balancer routes traffic to the remaining healthy instances, ensuring high availability. ELB supports multiple types (Application, Network, and Gateway Load Balancers) to handle different traffic patterns and protocols.

Answer

Amazon Route 53

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Amazon CloudFront

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AWS Auto Scaling

Question 6

A company wants to use AWS to run a relational database that is compatible with MySQL but with improved performance and availability. Which service should they use?

Accepted Answer

Amazon Aurora. Amazon Aurora is the correct choice because it is a MySQL-compatible relational database engine that provides significantly higher performance (up to 5x faster than standard MySQL) and improved availability through features like distributed storage, automatic failover, and six-way replication across three Availability Zones. Aurora is designed to deliver the durability and availability of commercial databases while maintaining MySQL compatibility, making it ideal for workloads requiring enhanced performance and uptime.

Answer

Amazon RDS for MySQL

Answer

Amazon DynamoDB

Answer

Amazon Redshift

Question 7

Which AWS service helps you manage and deploy infrastructure as code using templates?

Accepted Answer

AWS CloudFormation. AWS CloudFormation is the correct service because it allows you to model and provision AWS resources using declarative templates (JSON or YAML). This enables Infrastructure as Code (IaC) by treating infrastructure as version-controlled, repeatable code, which can be used to create, update, and delete entire stacks of resources in a predictable manner.

Answer

AWS Elastic Beanstalk

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AWS OpsWorks

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AWS CodeDeploy

Question 8

Which AWS service provides a managed graph database for storing and querying highly connected data?

Accepted Answer

Amazon Neptune. Amazon Neptune is a fully managed graph database service optimized for storing and querying highly connected data. It supports both property graph models (using Apache TinkerPop Gremlin) and RDF models (using SPARQL), making it ideal for use cases like social networks, fraud detection, and knowledge graphs.

Answer

Amazon DocumentDB

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Amazon Keyspaces

Answer

Amazon QLDB

Question 9

Which AWS service provides a managed message broker for Apache ActiveMQ and RabbitMQ to help migrate existing messaging systems to the cloud?

Accepted Answer

Amazon MQ. Amazon MQ is a managed message broker service that natively supports Apache ActiveMQ and RabbitMQ, making it the ideal choice for migrating existing messaging systems that rely on these protocols to the cloud without rewriting application code. It handles the provisioning, patching, and high availability of the broker infrastructure, allowing you to use standard JMS, AMQP, MQTT, and STOMP protocols.

Answer

Amazon SQS

Answer

Amazon SNS

Answer

Amazon Kinesis

Question 10

Drag and drop the steps to migrate an on-premises database to Amazon RDS using AWS DMS in the correct order.

Accepted Answer

Create a replication instance, then create source and target endpoints, then test endpoint connectivity, then create a database migration task, then start the migration task.. DMS requires a replication instance, endpoints, connection testing, task creation, and then migration execution.

Answer

Create source and target endpoints, then create a replication instance, then test endpoint connectivity, then create a database migration task, then start the migration task.

Answer

Create a replication instance, then create source and target endpoints, then create a database migration task, then test endpoint connectivity, then start the migration task.

Answer

Create a replication instance, then test endpoint connectivity, then create source and target endpoints, then create a database migration task, then start the migration task.

Question 11

Match each AWS Well-Architected Framework pillar to its description.

Accepted Answer

Security: Protect information, systems, and assets.. The AWS Well-Architected Framework pillars are Operational Excellence, Security, Reliability, Performance Efficiency, and Cost Optimization. Correct matches align each pillar with its core focus area.

Answer

Security: Ability to run and monitor systems.

Answer

Reliability: Ability to optimize costs.

Question 12

Match each AWS networking service to its description.

Accepted Answer

Amazon VPC: Isolated virtual network in the AWS cloud. Correct matches: Amazon VPC provides an isolated virtual network; AWS Global Accelerator optimizes traffic routing. Common confusions involve mixing up AWS Direct Connect (dedicated connection) with Route 53 (DNS).

Answer

AWS Direct Connect: DNS service that routes users to AWS endpoints

Answer

Amazon Route 53: Dedicated network connection from on-premises to AWS

Question 13

A startup wants to deploy a simple web application without managing any servers. The application must automatically scale based on incoming traffic and only incur costs when requests are processed. Which AWS service should the startup use?

Accepted Answer

AWS Lambda. AWS Lambda is a fully managed, serverless compute service that runs code in response to events and automatically scales. The startup does not need to manage any servers, and they are billed only for the compute time their code consumes. When combined with Amazon API Gateway, Lambda can host a simple web application that scales automatically with traffic and incurs no cost when idle, perfectly matching the requirements.

Answer

Amazon ECS with Fargate

Answer

AWS Elastic Beanstalk

Answer

Amazon EC2 Auto Scaling

Question 14

A company needs to provide its data scientists with access to a petabyte-scale data warehouse that can run complex analytical queries. The company wants a fully managed solution that can scale automatically and integrate with existing business intelligence tools. Which AWS service should the company use?

Accepted Answer

Amazon Redshift. Amazon Redshift is a fully managed, petabyte-scale data warehouse that supports complex analytical queries and integrates with business intelligence tools. It uses columnar storage and massively parallel processing to deliver high performance. Redshift can automatically scale and offers features like Redshift Spectrum to query data in S3. The other options are either transactional databases or query services that do not provide a complete data warehouse solution.

Answer

Amazon Athena

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Amazon RDS

Answer

Amazon DynamoDB

Question 15

A financial services company must ensure that all data stored in Amazon S3 is encrypted at rest using keys that the company manages and rotates according to its internal security policy. The company also needs to audit key usage separately from other AWS services. Which AWS service should the company use to meet these requirements?

Accepted Answer

AWS Key Management Service (AWS KMS) with customer managed keys. AWS Key Management Service (AWS KMS) with customer managed keys allows the company to create, manage, and rotate encryption keys according to its policies. It integrates with Amazon S3 to encrypt data at rest, and all key usage is logged in AWS CloudTrail, providing a separate audit trail. The other options either do not allow customer-managed keys or do not provide the required auditing.

Answer

Amazon S3 server-side encryption with Amazon S3 managed keys (SSE-S3)

Answer

AWS CloudHSM

Answer

Amazon S3 server-side encryption with customer-provided keys (SSE-C)