AWS AWS Storage and Databases 5

Question 1

Which DynamoDB capacity mode automatically adjusts read and write throughput based on actual traffic patterns?

Accepted Answer

On-demand capacity mode

Answer

DynamoDB on-demand mode automatically scales to accommodate workloads without requiring capacity planning.

Question 2

An EC2 instance needs high-performance block storage with consistent low latency for a database workload. Which EBS volume type is most appropriate?

Accepted Answer

io2 Block Express

Answer

io2 Block Express provides the highest performance EBS storage with up to 256,000 IOPS, designed for I/O-intensive database workloads.

Question 3

What is Amazon Aurora's storage replication factor across Availability Zones?

Accepted Answer

6 copies across 3 AZs

Answer

Aurora automatically replicates data 6 ways across 3 Availability Zones to ensure durability and high availability.

Question 4

Which AWS service acts as a fully managed cache layer that supports both Redis and Memcached engines?

Accepted Answer

Amazon ElastiCache

Answer

Amazon ElastiCache is a managed in-memory caching service that supports both Redis and Memcached.

Question 5

A developer wants to query data stored in S3 using standard SQL without loading it into a database. Which service enables this?

Accepted Answer

Amazon Athena

Answer

Amazon Athena is a serverless interactive query service that allows SQL queries directly against data stored in S3.

AWS Practice Test