AWS Compute and Storage Services 5

Question 1

Which AWS compute service enables running HPC workloads with tightly coupled, low-latency networking using Elastic Fabric Adapter (EFA)?

Accepted Answer

Amazon EC2 with EFA-supported instance types

Answer

Elastic Fabric Adapter (EFA) is a network interface for EC2 instances that provides low-latency, high-bandwidth communication required by HPC and ML training workloads.

Question 2

What is the difference between an EC2 instance store and an EBS volume?

Accepted Answer

EBS provides persistent storage; instance store is ephemeral and lost when the instance stops or terminates

Answer

EBS volumes are durable network-attached storage that persists independently, while instance store volumes are physically attached to the host and lost when the instance stops or terminates.

Question 3

A team needs to copy S3 objects from a bucket in us-east-1 to a bucket in eu-west-1 automatically whenever new objects are added. Which feature handles this?

Accepted Answer

S3 Cross-Region Replication (CRR)

Answer

S3 Cross-Region Replication (CRR) automatically replicates new objects from a source bucket to a destination bucket in a different AWS Region.

Question 4

Which EC2 Auto Scaling policy type adds or removes a fixed number of instances based on a CloudWatch alarm threshold?

Accepted Answer

Step Scaling

Answer

Step Scaling adjusts capacity by a defined number of instances in steps based on the magnitude of a CloudWatch alarm breach.

Question 5

An application requires block storage with 64,000 IOPS and sub-millisecond latency for a critical Oracle database. Which EBS volume type should be used?

Accepted Answer

io2 Block Express

Answer

io2 Block Express supports up to 256,000 IOPS and sub-millisecond latency, making it ideal for latency-sensitive, high-performance databases.

AWS Practice Test

AWS Practice Test

AWS Compute and Storage Services 5