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

Question 1

A company runs a web application where requests to /api/* should be routed to one group of EC2 instances and requests to /images/* should be routed to another group. Which AWS load balancer type supports this URL path-based routing?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Application Load Balancer (ALB). The Application Load Balancer (ALB) operates at Layer 7 (HTTP/HTTPS) and supports content-based routing, including path-based routing rules that direct requests to different target groups based on URL paths such as /api/* and /images/*. This makes ALB the correct choice for the described use case.

Answer

Network Load Balancer (NLB)

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Classic Load Balancer (CLB)

Answer

Gateway Load Balancer (GWLB)

Question 2

A company runs containerised microservices using Amazon ECS. The operations team wants to stop managing EC2 instances, including patching and capacity planning for the container hosts. Which option allows them to run containers on ECS without managing servers?

Accepted Answer

Use AWS Fargate as the ECS launch type. AWS Fargate is a serverless compute engine for containers that works with Amazon ECS. When you use Fargate as the launch type, you no longer need to provision, patch, or manage EC2 instances; AWS handles the underlying infrastructure, including capacity planning and OS patching. This directly meets the operations team's requirement to stop managing servers.

Answer

Run ECS tasks on On-Demand EC2 instances

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Use AWS Lambda to run the containers

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Run ECS tasks on Reserved EC2 instances

Question 3

A startup's development team wants to deploy their Node.js web application to AWS without learning about load balancers, auto scaling, or EC2 configuration. They want to simply upload their application code and have AWS handle everything else. Which AWS service is designed for this use case?

Accepted Answer

AWS Elastic Beanstalk. AWS Elastic Beanstalk is the correct service because it is a Platform as a Service (PaaS) offering that automatically handles capacity provisioning, load balancing, auto scaling, and application health monitoring. The development team can simply upload their Node.js application code, and Elastic Beanstalk deploys it on pre-configured EC2 instances without requiring any manual configuration of infrastructure components.

Answer

Amazon EC2 Auto Scaling

Answer

AWS CloudFormation

Answer

Amazon ECS

Question 4

A retail company's order processing system receives large bursts of orders during flash sales. The order intake API gets overwhelmed because it directly calls a downstream processing service that is slower. The company wants to decouple the API from the processing service so orders are not lost during spikes. Which AWS service should they use?

Accepted Answer

Amazon SQS. Amazon SQS (Simple Queue Service) is the correct choice because it provides a fully managed message queue that decouples the order intake API from the downstream processing service. When the API receives a burst of orders, it can immediately push each order message into an SQS queue, and the processing service can poll and consume messages at its own pace, ensuring no orders are lost even during traffic spikes.

Answer

Amazon SNS

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Amazon EventBridge

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AWS Step Functions

Question 5

A company publishes a message each time a new product is added to its catalogue. Three services need to receive this message simultaneously: an email notification service, an inventory update service, and an analytics service. Which AWS service should the company use to deliver the message to all three services at the same time?

Accepted Answer

Amazon SNS. Amazon SNS is the correct choice because it is a fully managed pub/sub messaging service designed to deliver messages to multiple subscribers simultaneously. When a new product is added, the company can publish a single message to an SNS topic, and SNS will fan out that message to all three subscribed endpoints (email, inventory, and analytics) in parallel, ensuring they receive it at the same time.

Answer

Amazon SQS

Answer

Amazon Kinesis Data Streams

Answer

AWS EventBridge

Question 6

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.

Answer

AWS CloudTrail

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AWS Config

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AWS X-Ray

Question 7

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.

Answer

AWS Systems Manager

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AWS CodePipeline

Answer

Amazon CloudWatch

Question 8

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.

Answer

Amazon RDS for MySQL

Answer

Amazon DynamoDB

Answer

Amazon Aurora

Question 9

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.

Answer

Amazon RDS Read Replica

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Amazon S3

Answer

Amazon DynamoDB

Question 10

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.

Answer

S3 Object Lock

Answer

S3 Cross-Region Replication

Answer

S3 Intelligent-Tiering

Question 11

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

Answer

S3 Intelligent-Tiering

Answer

S3 Event Notification

Question 12

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

Answer

Instance Store

Answer

Amazon EFS

Question 13

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

Answer

Instance Store

Answer

Amazon S3

Question 14

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

Answer

Amazon DynamoDB

Answer

Amazon Redshift

Question 15

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

Answer

Amazon EC2 with NVIDIA GPUs

Answer

Amazon Rekognition