CLF-C02 Database Services 3

Question 1

What type of database is Amazon DynamoDB?

Accepted Answer

NoSQL key-value and document database

Answer

DynamoDB is a fully managed NoSQL database service that supports both key-value and document data models.

Question 2

Which Amazon RDS feature automatically creates a standby replica in a different Availability Zone to provide failover support?

Accepted Answer

Multi-AZ Deployment

Answer

RDS Multi-AZ Deployment maintains a synchronous standby replica in another AZ and automatically fails over if the primary instance fails.

Question 3

A developer wants to offload database connection management to reduce overhead on an Amazon RDS instance. Which service helps?

Accepted Answer

Amazon RDS Proxy

Answer

Amazon RDS Proxy pools and manages database connections, reducing overhead and improving application scalability.

Question 4

What is the primary use case for Amazon Redshift?

Accepted Answer

Performing large-scale data analytics and business intelligence

Answer

Amazon Redshift is a petabyte-scale data warehouse designed for OLAP queries and business intelligence workloads.

Question 5

Which AWS service provides a fully managed ledger database with an immutable, cryptographically verifiable transaction log?

Accepted Answer

Amazon QLDB

Answer

Amazon QLDB (Quantum Ledger Database) maintains an immutable journal of all data changes, making it ideal for compliance-sensitive applications.

(CLF-C02) AWS Certified Cloud Practitioner Practice Test