72 AWS · Databases questions from the Cloud bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.a multi-region, multi-active replicated DynamoDB table for low-latency global access
B.Relational Database Service; managed relational databases like PostgreSQL and MySQL
C.a cross-region Aurora setup with low-latency reads and fast disaster recovery
D.a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage
Answer + AI explanation with Pro
2. Which term means: "Relational Database Service; managed relational databases like PostgreSQL and MySQL"?
Junior
A.RDS Multi-AZ
B.RDS
C.Aurora Global Database
D.Read Replica
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.RDS — an ordered, time-ordered log of item-level changes in a DynamoDB table
B.RDS — a managed in-memory cache service supporting Redis and Memcached engines
C.RDS — Relational Database Service; managed relational databases like PostgreSQL and MySQL
D.RDS — an in-memory cache for DynamoDB delivering microsecond read latency
Answer + AI explanation with Pro
4. What is DynamoDB?
Junior
A.a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage
B.a fully managed, serverless key-value and document NoSQL database with single-digit-ms latency
C.a multi-region, multi-active replicated DynamoDB table for low-latency global access
D.an ordered, time-ordered log of item-level changes in a DynamoDB table
Answer + AI explanation with Pro
5. Which term means: "a fully managed, serverless key-value and document NoSQL database with single-digit-ms latency"?
Junior
A.DynamoDB
B.DynamoDB DAX
C.DynamoDB Global Table
D.RDS Proxy
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.DynamoDB — a multi-region, multi-active replicated DynamoDB table for low-latency global access
B.DynamoDB — a fully managed, serverless key-value and document NoSQL database with single-digit-ms latency
C.DynamoDB — a Global Secondary Index allowing queries on non-key attributes with its own throughput
D.DynamoDB — a managed connection pool that improves database scalability and failover for RDS
Answer + AI explanation with Pro
7. What is Aurora?
Junior
A.a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage
B.a fully managed, serverless key-value and document NoSQL database with single-digit-ms latency
C.an ordered, time-ordered log of item-level changes in a DynamoDB table
D.an on-demand auto-scaling configuration of Aurora that adjusts capacity automatically
Answer + AI explanation with Pro
8. Which term means: "a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage"?
Junior
A.RDS Proxy
B.DynamoDB GSI
C.Read Replica
D.Aurora
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.Aurora — an ordered, time-ordered log of item-level changes in a DynamoDB table
B.Aurora — a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage
C.Aurora — an on-demand auto-scaling configuration of Aurora that adjusts capacity automatically
D.Aurora — a Global Secondary Index allowing queries on non-key attributes with its own throughput
Answer + AI explanation with Pro
10. What is RDS Multi-AZ?
Mid
A.a fully managed, petabyte-scale columnar data warehouse for analytics
B.a multi-region, multi-active replicated DynamoDB table for low-latency global access
C.a deployment that maintains a synchronous standby replica in another AZ for failover
D.a managed connection pool that improves database scalability and failover for RDS
Answer + AI explanation with Pro
11. Which term means: "a deployment that maintains a synchronous standby replica in another AZ for failover"?
Mid
A.Read Replica
B.DynamoDB Global Table
C.RDS Proxy
D.RDS Multi-AZ
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.RDS Multi-AZ — a cross-region Aurora setup with low-latency reads and fast disaster recovery
B.RDS Multi-AZ — a managed in-memory cache service supporting Redis and Memcached engines
C.RDS Multi-AZ — a deployment that maintains a synchronous standby replica in another AZ for failover
D.RDS Multi-AZ — a MySQL- and PostgreSQL-compatible relational database built for the cloud with auto-scaling storage
Answer + AI explanation with Pro
13. What is Read Replica?
Mid
A.a managed connection pool that improves database scalability and failover for RDS
B.an ordered, time-ordered log of item-level changes in a DynamoDB table
C.a fully managed, petabyte-scale columnar data warehouse for analytics
D.an asynchronously replicated copy of a database used to scale read traffic
Answer + AI explanation with Pro
14. Which term means: "an asynchronously replicated copy of a database used to scale read traffic"?
Mid
A.Redshift
B.ElastiCache
C.Aurora Serverless
D.Read Replica
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.Read Replica — an asynchronously replicated copy of a database used to scale read traffic
B.Read Replica — a managed in-memory cache service supporting Redis and Memcached engines
C.Read Replica — a deployment that maintains a synchronous standby replica in another AZ for failover
D.Read Replica — a multi-region, multi-active replicated DynamoDB table for low-latency global access
Answer + AI explanation with Pro
16. What is DynamoDB GSI?
Mid
A.a managed in-memory cache service supporting Redis and Memcached engines
B.a Global Secondary Index allowing queries on non-key attributes with its own throughput
C.an on-demand auto-scaling configuration of Aurora that adjusts capacity automatically
D.a managed connection pool that improves database scalability and failover for RDS
Answer + AI explanation with Pro
17. Which term means: "a Global Secondary Index allowing queries on non-key attributes with its own throughput"?
Mid
A.DynamoDB DAX
B.DynamoDB
C.DynamoDB GSI
D.Aurora Serverless
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.DynamoDB GSI — a fully managed, serverless key-value and document NoSQL database with single-digit-ms latency
B.DynamoDB GSI — a managed connection pool that improves database scalability and failover for RDS
C.DynamoDB GSI — a Global Secondary Index allowing queries on non-key attributes with its own throughput
D.DynamoDB GSI — a deployment that maintains a synchronous standby replica in another AZ for failover
Answer + AI explanation with Pro
19. What is ElastiCache?
Senior
A.a managed in-memory cache service supporting Redis and Memcached engines
B.a Global Secondary Index allowing queries on non-key attributes with its own throughput
C.Relational Database Service; managed relational databases like PostgreSQL and MySQL
D.a fully managed, petabyte-scale columnar data warehouse for analytics
Answer + AI explanation with Pro
20. Which term means: "a managed in-memory cache service supporting Redis and Memcached engines"?
Senior
A.DynamoDB Global Table
B.ElastiCache
C.Read Replica
D.RDS
Answer + AI explanation with Pro
21. Which statement is correct?
Senior
A.ElastiCache — Relational Database Service; managed relational databases like PostgreSQL and MySQL
B.ElastiCache — a managed connection pool that improves database scalability and failover for RDS
C.ElastiCache — a managed in-memory cache service supporting Redis and Memcached engines
D.ElastiCache — a cross-region Aurora setup with low-latency reads and fast disaster recovery
Answer + AI explanation with Pro
22. What is DynamoDB Streams?
Senior
A.an on-demand auto-scaling configuration of Aurora that adjusts capacity automatically
B.an in-memory cache for DynamoDB delivering microsecond read latency
C.a managed in-memory cache service supporting Redis and Memcached engines
D.an ordered, time-ordered log of item-level changes in a DynamoDB table
Answer + AI explanation with Pro
23. Which term means: "an ordered, time-ordered log of item-level changes in a DynamoDB table"?
Senior
A.DynamoDB GSI
B.Redshift
C.RDS Multi-AZ
D.DynamoDB Streams
Answer + AI explanation with Pro
24. Which statement is correct?
Senior
A.DynamoDB Streams — a managed connection pool that improves database scalability and failover for RDS
B.DynamoDB Streams — a managed in-memory cache service supporting Redis and Memcached engines
C.DynamoDB Streams — an in-memory cache for DynamoDB delivering microsecond read latency
D.DynamoDB Streams — an ordered, time-ordered log of item-level changes in a DynamoDB table
Answer + AI explanation with Pro
25. What does aws rds create-db-instance do?
Junior
A.modifies throughput, indexes, or streams settings on a DynamoDB table
B.retrieves items matching a partition key with optional sort-key conditions
C.provisions a new managed RDS database instance
D.writes a single item to a DynamoDB table
Answer + AI explanation with Pro
26. Which command will provisions a new managed RDS database instance?
Junior
A.aws rds create-db-instance
B.aws rds describe-db-instances
C.aws dynamodb put-item
D.aws rds failover-db-cluster
Answer + AI explanation with Pro
27. Which statement is correct?
Junior
A.aws rds create-db-instance — creates a manual storage snapshot of an RDS instance
B.aws rds create-db-instance — changes settings like instance class or storage on an RDS instance
C.aws rds create-db-instance — provisions a new managed RDS database instance
D.aws rds create-db-instance — triggers a failover of an Aurora cluster to a replica
Answer + AI explanation with Pro
28. What does aws rds create-db-snapshot do?
Mid
A.lists RDS instances and their configuration and status
B.creates an on-demand backup of a DynamoDB table
C.creates a manual storage snapshot of an RDS instance
D.reads a single item from a DynamoDB table by primary key
Answer + AI explanation with Pro
29. Which command will creates a manual storage snapshot of an RDS instance?
Mid
A.aws dynamodb query
B.aws dynamodb get-item
C.aws rds failover-db-cluster
D.aws rds create-db-snapshot
Answer + AI explanation with Pro
30. Which statement is correct?
Mid
A.aws rds create-db-snapshot — writes a single item to a DynamoDB table
B.aws rds create-db-snapshot — triggers a failover of an Aurora cluster to a replica
C.aws rds create-db-snapshot — provisions a new managed RDS database instance
D.aws rds create-db-snapshot — creates a manual storage snapshot of an RDS instance
Answer + AI explanation with Pro
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