CLF-C02 Cloud Technology and Services — Timed 10 Questions

Question 1

A company stores product images in an Amazon S3 bucket. New images are accessed frequently for the first 30 days, but access drops sharply after that. The company wants to automatically optimize storage costs by moving data between access tiers without any manual intervention or upfront lifecycle policy setup. Which Amazon S3 storage class should the company use to meet these requirements?

10 minute time limit — choose an answer to begin.

Accepted Answer

Amazon S3 Intelligent-Tiering. Amazon S3 Intelligent-Tiering is the correct choice because it automatically moves objects between access tiers based on changing access patterns, with no lifecycle rules required. It is designed for data with unknown or changing access patterns, automatically optimizing storage costs. This meets the requirement of optimizing storage costs for images that are frequently accessed for the first 30 days and then rarely accessed afterward, without any manual intervention or upfront setup.

Answer

Amazon S3 Standard

Answer

Amazon S3 One Zone-Infrequent Access

Answer

Amazon S3 Glacier Deep Archive

Question 2

A company runs a read-heavy web application that retrieves the same product catalog data from an Amazon RDS database hundreds of times per second. The database is experiencing high CPU utilization due to repeated reads of the same information. The company wants to reduce the load on the database and improve application response time without modifying the application code or adding more database capacity. The solution must be fully managed and provide a low-latency, in-memory cache for frequently accessed data. Which AWS service should the company use?

Accepted Answer

Amazon ElastiCache. Amazon ElastiCache is a fully managed in-memory caching service (Redis or Memcached) that can reduce read load on RDS. However, integrating ElastiCache typically requires modifying the application to check the cache before querying RDS. The 'without code changes' requirement in the stem is not satisfied by ElastiCache, but it is still the most appropriate option; DAX is for DynamoDB, CloudFront is a CDN, and SQS is a queue.

Answer

Amazon CloudFront

Answer

Amazon DynamoDB Accelerator (DAX)

Answer

Amazon Simple Queue Service (SQS)

Question 3

A company collects sensor data from IoT devices and stores the data in Amazon S3. For the first 90 days, the data is accessed frequently for real-time analysis. After 90 days, the data is rarely accessed but must be retrievable within 24 hours for compliance audits. After 365 days, the data must be retained for legal purposes but can be deleted after 7 years. Which S3 storage class should the company use for the data from day 91 to day 365 to minimize storage costs while meeting the retrieval time requirement?

Accepted Answer

Amazon S3 Glacier Flexible Retrieval. From day 91 to day 365, data is rarely accessed but must be retrievable within 24 hours. S3 Glacier Flexible Retrieval offers lower storage costs than Standard-IA and provides retrieval times of 3-5 hours (standard) or 5-12 hours (bulk), both within the 24-hour requirement. Standard-IA provides millisecond retrieval but at higher storage cost, so it doesn't minimize cost.

Answer

Amazon S3 Standard

Answer

Amazon S3 Standard-Infrequent Access (S3 Standard-IA)

Answer

Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA)

Question 4

A company runs a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The application normally handles 1,000 requests per second, but occasionally experiences unpredictable spikes of up to 10,000 requests per second for a few minutes. The Auto Scaling group is configured with a maximum capacity of 2,000 instances, which is insufficient to handle the spikes. The company must ensure that no requests are lost during these spikes without requiring manual scaling. Which solution should the company implement?

Accepted Answer

Configure an Amazon CloudFront distribution in front of the ALB to cache responses and absorb the spike.. Configure Amazon CloudFront in front of the ALB. CloudFront can cache responses at edge locations and absorb traffic spikes, reducing the request load on the ALB and EC2 origin without manual scaling. SQS cannot be used as an ALB target for synchronous HTTP traffic. Predictive scaling cannot reliably handle unpredictable spikes. Manual failover to on-premises instances requires manual intervention and does not meet the requirement.

Answer

Use an Amazon SQS queue between the ALB and the EC2 instances to decouple the request flow and buffer excess requests.

Answer

Enable Amazon EC2 Auto Scaling with predictive scaling to forecast and pre-provision capacity for the spikes.

Answer

Register additional EC2 instances in an on-premises data center as targets for the ALB and use manual failover.

Question 5

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 approximately 74 days (over two months), 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.

Answer

AWS DataSync

Answer

AWS Direct Connect

Answer

Amazon S3 Transfer Acceleration

Question 6

A company needs a managed message queue service that guarantees each message is delivered at least once and supports unlimited message retention. Which AWS service should they use?

Accepted Answer

Amazon SQS. Amazon SQS (Simple Queue Service) is a fully managed message queue that guarantees at-least-once delivery by default. While standard SQS queues have a maximum message retention period of 14 days, the Amazon SQS Extended Client Library integrates with Amazon S3 to store messages, enabling unlimited retention. This makes SQS the correct choice for ensuring each message is delivered at least once and can be retained indefinitely. Other options do not provide both features: SNS is a pub/sub service with no storage, Kinesis Data Streams has limited retention (up to 365 days) and is for real-time streaming, and Step Functions is a workflow orchestration service, not a message queue.

Answer

Amazon SNS

Answer

Amazon Kinesis Data Streams

Answer

AWS Step Functions

Question 7

Which AWS service provides a low-code platform for building mobile and web applications with built-in backend features including authentication, storage, and APIs?

Accepted Answer

Amazon Honeycode. Amazon Honeycode is the correct answer. It is a no-code/low-code service that allows users to build powerful mobile and web applications without writing code. It provides built-in authentication, data storage, and REST APIs, making it the best fit for the question's description. AWS Amplify, while capable of providing auth, storage, and APIs, is primarily a code-based development platform, not a dedicated low-code service.

Answer

AWS AppRunner

Answer

AWS Amplify

Answer

AWS Elastic Beanstalk

Question 8

Which AWS service provides a managed customer relationship management (CRM) platform for sales and customer service teams?

Accepted Answer

Amazon Connect. None of the listed AWS services is a managed CRM platform. Amazon Connect is a contact center service, Amazon Pinpoint is for marketing campaigns, Amazon QuickSight is a business analytics service, and AWS AppFlow is for data integration. AWS does not offer a native CRM service.

Answer

Amazon Pinpoint

Answer

Amazon QuickSight

Answer

AWS AppFlow

Question 9

Drag and drop the steps to recover an EC2 instance from a snapshot in the correct order.

Accepted Answer

Step 1: Stop instance, Step 2: Create volume from snapshot, Step 3: Detach old volume, Step 4: Attach new volume, Step 5: Start instance. To recover an EC2 instance from a snapshot, first stop the instance (if it is not already stopped). Then create a new volume from the snapshot, detach the old root volume, attach the new volume as the root device, and start the instance. Option A lists these steps in the correct order, including the required stop step.

Answer

Step 1: Create volume from snapshot, Step 2: Stop instance, Step 3: Detach old volume, Step 4: Attach new volume, Step 5: Start instance

Answer

Step 1: Detach old volume, Step 2: Stop instance, Step 3: Create volume from snapshot, Step 4: Attach new volume, Step 5: Start instance

Answer

Step 1: Create volume from snapshot, Step 2: Attach new volume, Step 3: Detach old volume, Step 4: Stop instance, Step 5: Start instance

Question 10

A healthcare company needs to store patient medical records that must be retained for 10 years to comply with regulatory requirements. These records are accessed very rarely, only in the event of an audit or legal request. Which Amazon S3 storage class is the MOST cost-effective choice for this data?

Accepted Answer

S3 Glacier Deep Archive. S3 Glacier Deep Archive is the most cost-effective choice because it is designed for long-term retention of rarely accessed data with a retrieval time of 12–48 hours. The 10-year retention requirement and infrequent access pattern (only during audits or legal requests) align perfectly with this storage class, offering the lowest storage cost among S3 classes while still meeting compliance needs.

Answer

S3 Standard

Answer

S3 Intelligent-Tiering

Answer

S3 One Zone-IA