CLF-C02 Quick Quiz — 10 Questions

Question 1

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

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Amazon Kinesis Data Streams

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AWS EventBridge

Question 2

A media company stores frequently accessed video thumbnails in Amazon S3. The thumbnails are read multiple times every day and must be highly available and durable. Which S3 storage class is most appropriate for this workload?

Accepted Answer

S3 Standard. S3 Standard is the most appropriate storage class because it offers high durability (99.999999999%) and high availability (99.99%) with low-latency access, making it ideal for frequently accessed, critical data like video thumbnails that are read multiple times daily. It provides automatic replication across a minimum of three Availability Zones, ensuring both high availability and durability without retrieval fees or minimum storage duration penalties.

Answer

S3 One Zone-IA

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S3 Glacier Flexible Retrieval

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S3 Standard-IA

Question 3

A company needs a service to translate domain names (like www.example.com) into IP addresses, check the health of their web servers, and automatically redirect traffic to a healthy backup server if the primary server fails. Which AWS service provides all of these capabilities?

Accepted Answer

Amazon Route 53. Amazon Route 53 is a DNS web service that translates domain names to IP addresses. It also offers health checks that monitor the availability of web servers and can automatically route traffic away from unhealthy endpoints to healthy ones using DNS failover routing policies.

Answer

Amazon VPC

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Amazon CloudFront

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AWS Direct Connect

Question 4

A startup runs an application on AWS and receives a monthly bill that charges exactly for the number of compute hours used, the gigabytes of data stored, and the gigabytes of data transferred. The company pays nothing for resources they did not use. Which cloud computing characteristic does this represent?

Accepted Answer

Measured service. This scenario describes a pay-per-use model where costs directly correlate with actual consumption of compute hours, storage, and data transfer. Measured service is the cloud characteristic that enables this by automatically monitoring, controlling, and reporting resource usage, providing transparency for both the provider and consumer. AWS implements this through services like AWS CloudTrail and detailed billing reports, ensuring customers are charged only for what they consume.

Answer

Rapid elasticity

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On-demand self-service

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Resource pooling

Question 5

A financial institution runs its core banking application on-premises due to regulatory requirements. It has connected its data centre to AWS using AWS Direct Connect and runs analytics workloads on AWS that access data from the on-premises systems. Which cloud deployment model does this describe?

Accepted Answer

Hybrid cloud. This scenario describes a hybrid cloud deployment because the financial institution maintains its core banking application on an on-premises data center (private infrastructure) while also running analytics workloads on AWS (public cloud). The two environments are connected via AWS Direct Connect, a dedicated network link that enables secure, low-latency data transfer between the on-premises systems and AWS, allowing the analytics workloads to access on-premises data. Hybrid cloud specifically refers to the integration of on-premises private infrastructure with public cloud services, which matches this setup.

Answer

Public cloud

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Private cloud

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Multi-cloud

Question 6

A company wants to run a MySQL database in AWS without managing database software installation, applying patches, setting up backups, or configuring replication for high availability. Which AWS service meets these requirements?

Accepted Answer

Amazon RDS. Amazon RDS is a managed database service that automates database software installation, patching, backup, and replication for high availability. By choosing RDS for MySQL, the company offloads these administrative tasks to AWS, meeting the requirement to avoid manual management of the database software, patches, backups, and replication configuration.

Answer

Amazon EC2 with a self-managed MySQL installation

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Amazon Redshift

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Amazon ElastiCache

Question 7

A security auditor needs to know which IAM user deleted a specific S3 bucket last week, from which IP address the action was taken, and at what exact time. Which AWS service captures this information?

Accepted Answer

AWS CloudTrail. AWS CloudTrail is the correct service because it records all API calls made to the AWS environment, including S3 bucket deletion actions (DeleteBucket). It captures the identity of the IAM user, the source IP address, and the exact timestamp of each API call, which directly meets the auditor's requirements.

Answer

Amazon CloudWatch

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AWS Config

Answer

Amazon GuardDuty

Question 8

A development team wants to deploy a Python web application to AWS without managing load balancers, auto scaling groups, or the underlying EC2 instance operating systems. They want to upload their code and have AWS handle the infrastructure. Which cloud service model does this represent?

Accepted Answer

Platform as a Service (PaaS). Platform as a Service (PaaS) provides a managed platform where developers can upload code and AWS handles the underlying infrastructure, including load balancing, auto scaling, and OS patching. AWS Elastic Beanstalk is a PaaS service that abstracts EC2 instances, load balancers, and auto scaling groups, allowing the team to focus solely on their Python web application code.

Answer

Infrastructure as a Service (IaaS)

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Software as a Service (SaaS)

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Serverless

Question 9

An operations team documents all operational procedures as runbooks, deploys infrastructure using AWS CloudFormation templates stored in version control, and continuously refines their processes based on lessons learned from incidents. Which pillar of the AWS Well-Architected Framework does this represent?

Accepted Answer

Operational Excellence. Operational Excellence focuses on running and monitoring systems to deliver business value, and continually improving processes and procedures. Documenting runbooks, using infrastructure as code (CloudFormation) with version control, and refining processes from incident lessons are core practices of this pillar, as they enable repeatable, auditable, and continuously improving operations.

Answer

Reliability

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Security

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Cost Optimisation

Question 10

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

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AWS CloudFormation

Answer

Amazon ECS