AWS Compute and Storage Services 4

Question 1

A developer needs to share an EFS file system across multiple EC2 instances in different Availability Zones within the same VPC. What must be configured?

Accepted Answer

Mount targets in each AZ where EC2 instances reside

Answer

Amazon EFS requires a mount target in each Availability Zone where EC2 instances need access to the file system.

Question 2

Which EC2 instance type family is optimized for applications requiring high memory-to-vCPU ratios, such as in-memory databases?

Accepted Answer

R-family (Memory Optimized)

Answer

R-family EC2 instances are Memory Optimized and designed for workloads that process large datasets in memory, such as SAP HANA or Redis.

Question 3

What S3 feature automatically moves objects between storage classes based on defined lifecycle rules?

Accepted Answer

S3 Lifecycle policies with transition actions

Answer

S3 Lifecycle policies with transition actions automatically move objects to cheaper storage classes (e.g., Standard → IA → Glacier) based on age.

Question 4

An EC2 instance in a private subnet needs to download software updates from the internet. What is the correct solution?

Accepted Answer

Place a NAT Gateway in a public subnet and update the private subnet route table

Answer

A NAT Gateway placed in a public subnet allows instances in private subnets to initiate outbound internet traffic without being directly reachable from the internet.

Question 5

Which EBS volume type provides the highest throughput for large sequential workloads like data warehouses and log processing?

Accepted Answer

st1 (Throughput Optimized HDD)

Answer

st1 (Throughput Optimized HDD) is designed for large, sequential workloads and delivers up to 500 MB/s throughput at a lower cost than SSDs.

AWS Practice Test

AWS Practice Test

AWS Compute and Storage Services 4