AWS Compute and Storage Services 3

Question 1

An application needs to process jobs from a queue and scale in/out based on queue depth. Which EC2 feature best supports this pattern?

Accepted Answer

EC2 Auto Scaling with a custom CloudWatch metric based on SQS queue depth

Answer

EC2 Auto Scaling can use custom CloudWatch metrics—such as SQS queue depth—as scaling triggers to dynamically adjust capacity.

Question 2

Which S3 storage class is designed for data that is accessed less than once per month and requires millisecond retrieval?

Accepted Answer

S3 Glacier Instant Retrieval

Answer

S3 Glacier Instant Retrieval is designed for rarely accessed archive data (once per quarter) but provides millisecond retrieval times.

Question 3

A company wants to run a stateful containerized application on AWS without managing servers. Which service should they use?

Accepted Answer

AWS Fargate

Answer

AWS Fargate is a serverless compute engine for containers that removes the need to provision or manage EC2 instances.

Question 4

What is the maximum size of a single object that can be uploaded to S3 using a single PUT operation?

Accepted Answer

5 GB

Answer

A single S3 PUT operation supports objects up to 5 GB; use Multipart Upload for objects larger than 5 GB (up to 5 TB total).

Question 5

Which EC2 purchasing option provides the largest discount compared to On-Demand pricing but can be interrupted by AWS with a two-minute notice?

Accepted Answer

Spot Instances

Answer

EC2 Spot Instances offer up to 90% discount over On-Demand pricing but can be reclaimed by AWS with a two-minute interruption notice.

AWS Practice Test