AWS AWS Database and Analytics Services 1 — Questions and Answers
Question 1: Which AWS database service is a fully managed, serverless, key-value NoSQL database designed for high-performance applications?
- Amazon RDS
- Amazon DynamoDB (Correct answer)
- Amazon Redshift
- Amazon Aurora
Correct answer: Amazon DynamoDB
Amazon DynamoDB is a fully managed, serverless, key-value and document NoSQL database that delivers single-digit millisecond performance at any scale.
Question 2: What is the maximum size of a single item in Amazon DynamoDB?
- 1 MB
- 400 KB (Correct answer)
- 64 KB
- 16 MB
Correct answer: 400 KB
A single item in DynamoDB can store up to 400 KB of data, including attribute names and values.
Question 3: Which Amazon RDS feature automatically creates a standby instance in a different Availability Zone for failover support?
- Read Replicas
- Multi-AZ Deployment (Correct answer)
- Aurora Global Database
- RDS Proxy
Correct answer: Multi-AZ Deployment
Multi-AZ Deployment provisions a synchronous standby replica in a different AZ, enabling automatic failover in the event of a primary DB instance failure.
Question 4: Which AWS service is a petabyte-scale data warehouse solution optimized for complex analytics queries?
- Amazon Athena
- Amazon EMR
- Amazon Redshift (Correct answer)
- Amazon QuickSight
Correct answer: Amazon Redshift
Amazon Redshift is a fully managed, petabyte-scale data warehouse service that makes it simple to analyze data using standard SQL and existing BI tools.
Question 5: Which DynamoDB capacity mode automatically adjusts read and write throughput based on actual traffic patterns?
- Provisioned Mode
- On-Demand Mode (Correct answer)
- Reserved Mode
- Burst Mode
Correct answer: On-Demand Mode
DynamoDB On-Demand Mode automatically scales to accommodate workloads without requiring capacity planning, charging per request.
Question 6: What does Amazon ElastiCache provide for AWS applications?
- Persistent block storage
- In-memory caching to improve database performance (Correct answer)
- Managed graph database service
- Automated database backups
Correct answer: In-memory caching to improve database performance
Amazon ElastiCache is a fully managed in-memory caching service supporting Redis and Memcached, used to reduce database load and improve response times.
AWS AWS Database and Analytics Services 1
Which AWS database service is a fully managed, serverless, key-value NoSQL database designed for high-performance applications?