CLF-C02 Cloud Technology and Services Practice Test 11 — 15 Questions

Question 1

A company wants to monitor the CPU utilisation of their EC2 instances and automatically send an email alert when utilisation exceeds 80% for more than 5 consecutive minutes. Which AWS service provides this monitoring and alerting capability?

Accepted Answer

Amazon CloudWatch. Amazon CloudWatch is the correct service because it provides both monitoring of EC2 CPU utilization metrics and the ability to create CloudWatch Alarms that trigger actions, such as sending an email via Amazon SNS, when a metric like CPUUtilization exceeds a threshold (e.g., 80%) for a specified number of consecutive evaluation periods (e.g., 5 minutes). This directly fulfills the requirement for monitoring and alerting on CPU utilization.

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AWS CloudTrail

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AWS Config

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AWS X-Ray

Question 2

A company wants to define their entire AWS infrastructure — VPCs, EC2 instances, RDS databases, and load balancers — as code in a text template so they can version-control the infrastructure, deploy it consistently across multiple environments, and recreate it reliably after deletion. Which AWS service enables this?

Accepted Answer

AWS CloudFormation. AWS CloudFormation is the correct service because it enables you to model your entire AWS infrastructure as a text template (JSON or YAML), which can be version-controlled, deployed consistently across environments, and used to recreate resources reliably. It is an Infrastructure as Code (IaC) service that provisions and manages AWS resources in an orderly and predictable fashion, directly matching the company's requirements.

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AWS Systems Manager

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AWS CodePipeline

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Amazon CloudWatch

Question 3

A company wants to analyse petabytes of historical sales data using standard SQL queries and connect their existing business intelligence (BI) tools to the data store. The workload is analytical (OLAP), not transactional (OLTP). Which AWS service is designed for this use case?

Accepted Answer

Amazon Redshift. Amazon Redshift is a fully managed, petabyte-scale data warehouse service designed for analytical (OLAP) workloads. It uses standard SQL and integrates directly with popular BI tools via JDBC/ODBC connections, making it ideal for querying large historical datasets and connecting existing business intelligence tools.

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Amazon RDS for MySQL

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Amazon DynamoDB

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Amazon Aurora

Question 4

A web application queries a relational database for a product catalogue that changes infrequently but is requested thousands of times per second. Database query latency is becoming a bottleneck. Which AWS service can the company use to cache frequently accessed query results in memory and reduce database load?

Accepted Answer

Amazon ElastiCache. Amazon ElastiCache is the correct choice because it provides an in-memory caching layer (using Redis or Memcached) that can store frequently accessed query results, reducing the need to repeatedly query the relational database. This dramatically lowers latency for high-throughput read workloads (thousands of requests per second) and offloads database pressure, directly addressing the bottleneck described.

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Amazon RDS Read Replica

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Amazon S3

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Amazon DynamoDB

Question 5

A development team accidentally deletes important files from an Amazon S3 bucket. The company wants to protect against accidental deletions and overwrites in the future, allowing recovery of previous versions of objects. Which S3 feature should they enable?

Accepted Answer

S3 Versioning. S3 Versioning is the correct feature because it preserves every version of an object, including overwrites and deletions. When versioning is enabled, deleting an object only adds a delete marker, and previous versions remain recoverable. This directly addresses the requirement to protect against accidental deletions and overwrites by allowing restoration of earlier object versions.

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S3 Object Lock

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S3 Cross-Region Replication

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S3 Intelligent-Tiering

Question 6

A company stores log files in Amazon S3 Standard. After 30 days, the logs are rarely accessed. After 365 days, they should be archived and almost never retrieved. The company wants to automatically move objects between storage classes to minimise cost. Which S3 feature enables this automated transition?

Accepted Answer

S3 Lifecycle policy. S3 Lifecycle policies allow you to define rules that automatically transition objects between storage classes based on age or other criteria. In this scenario, a lifecycle rule can move logs from S3 Standard to a lower-cost infrequent access class after 30 days, and then to S3 Glacier Deep Archive after 365 days, minimizing storage costs without manual intervention.

Answer

S3 Versioning

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S3 Intelligent-Tiering

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S3 Event Notification

Question 7

A company runs a database on an Amazon EC2 instance. They need block storage that persists independently from the EC2 instance — if the instance is stopped or terminated, the data must remain available. Which AWS storage service provides this?

Accepted Answer

Amazon EBS. Amazon EBS (Elastic Block Store) provides persistent block-level storage volumes that can be attached to an EC2 instance. Unlike instance store, EBS volumes persist independently of the instance lifecycle — data remains intact even when the instance is stopped or terminated, as long as the volume is not deleted. This makes EBS the correct choice for the requirement of persistent, independent block storage.

Answer

Amazon S3

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Instance Store

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Amazon EFS

Question 8

A company runs a web application on multiple EC2 instances across multiple Availability Zones. All instances need to access and share the same file system simultaneously to read and write shared configuration files. Which AWS storage service supports simultaneous access from multiple EC2 instances?

Accepted Answer

Amazon EFS. Amazon EFS is a fully managed, NFS-based file system that can be mounted concurrently by multiple EC2 instances across different Availability Zones, providing shared access for reading and writing configuration files. It uses the NFSv4.1 protocol and supports thousands of simultaneous connections, making it ideal for shared storage scenarios.

Answer

Amazon EBS

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Instance Store

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Amazon S3

Question 9

A company runs a MySQL database and wants to migrate to a cloud-native relational database that is fully managed, provides up to 5x the performance of standard MySQL, offers automated backups with point-in-time recovery, and is compatible with MySQL drivers and tools without application changes. Which AWS service meets these requirements?

Accepted Answer

Amazon Aurora. Amazon Aurora is a fully managed, MySQL-compatible relational database that delivers up to 5x the performance of standard MySQL, provides automated backups with point-in-time recovery, and is designed to work with existing MySQL drivers and tools without requiring application changes. This makes it the ideal choice for migrating a MySQL database to a cloud-native, high-performance relational database service.

Answer

Amazon RDS for MySQL

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Amazon DynamoDB

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Amazon Redshift

Question 10

A data science team wants to build, train, and deploy machine learning models without managing the underlying server infrastructure for training and inference. Which AWS service provides a fully managed environment for the machine learning workflow?

Accepted Answer

Amazon SageMaker. Amazon SageMaker is a fully managed service that provides every component needed for the machine learning workflow, including data labeling, model building, training, tuning, and deployment. It eliminates the need to manage underlying server infrastructure for both training and inference by automatically provisioning, scaling, and managing compute resources.

Answer

AWS Lambda

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Amazon EC2 with NVIDIA GPUs

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Amazon Rekognition

Question 11

A company wants to automatically detect and label objects in photos uploaded by users — such as identifying if a photo contains a person, a car, or an outdoor scene — without building their own machine learning model. Which AWS service provides this pre-built computer vision capability?

Accepted Answer

Amazon Rekognition. Amazon Rekognition is the correct choice because it is a fully managed, pre-trained computer vision service that can automatically detect and label objects, scenes, and faces in images without requiring any custom machine learning model development. It provides APIs for image analysis, including object and scene detection, which directly matches the requirement to identify if a photo contains a person, car, or outdoor scene.

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Amazon SageMaker

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Amazon Comprehend

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Amazon Polly

Question 12

A data analyst needs to run SQL queries directly against log files stored in Amazon S3 without loading the data into a database and without provisioning any servers. Which AWS service enables this?

Accepted Answer

Amazon Athena. Amazon Athena is a serverless interactive query service that allows you to analyze data directly in Amazon S3 using standard SQL. It requires no infrastructure to manage and charges only for the data scanned per query, making it ideal for ad-hoc analysis of log files without loading data into a database.

Answer

Amazon RDS

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Amazon Redshift

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Amazon DynamoDB

Question 13

A company needs to migrate 80 TB of on-premises data to Amazon S3. Their internet connection is 100 Mbps and transferring this much data over the internet would take months. Which AWS service allows them to migrate this data physically without relying on internet bandwidth?

Accepted Answer

AWS Snowball Edge. AWS Snowball Edge is a physical data transport solution designed for large-scale data migrations when network transfer is impractical. With 80 TB of data and a 100 Mbps connection, internet transfer would take over 80 days, making Snowball Edge the correct choice as it allows you to ship the data on a ruggedized device directly to AWS, bypassing internet bandwidth entirely.

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AWS DataSync

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AWS Direct Connect

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Amazon S3 Transfer Acceleration

Question 14

A company wants to create RESTful APIs that serve as the front door to their backend Lambda functions and EC2 services. They need features including API key management, throttling to protect backends from overload, and usage plan enforcement. Which AWS service provides this?

Accepted Answer

Amazon API Gateway. Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure RESTful APIs at any scale. It directly provides built-in API key management, throttling (rate limiting and burst limits), and usage plan enforcement to protect backend services like Lambda functions and EC2 instances from overload. These features are core to API Gateway's functionality, making it the correct choice for acting as the front door to the described backend resources.

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Amazon CloudFront

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AWS Direct Connect

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Amazon Route 53

Question 15

A development team uses AWS developer tools for their entire software delivery process: a Git-based code repository, automated compilation and testing, and automated deployment to EC2 instances. Which combination of AWS services provides these three capabilities?

Accepted Answer

AWS CodeCommit, AWS CodeBuild, and AWS CodeDeploy. AWS CodeCommit provides a Git-based code repository for source control. AWS CodeBuild performs automated compilation and testing. AWS CodeDeploy automates deployment to EC2 instances. Together, these three services directly map to the three capabilities described in the question.

Answer

AWS CloudFormation, AWS Elastic Beanstalk, and Amazon EC2

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Amazon S3, AWS Lambda, and Amazon CloudWatch

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AWS CodePipeline, Amazon ECR, and Amazon ECS