AWS DynamoDB Application Integration Quiz

1. Which DynamoDB feature allows you to define alternative query patterns on your table?

Local Secondary Index (LSI)

Global Secondary Index (GSI)

DynamoDB Accelerator (DAX)

Point-in-time recovery

2. Which DynamoDB feature allows you to automatically delete items after a specified time?

Point-in-time recovery

TTL (Time To Live)

DynamoDB Streams

Backup and restore

3. What is the maximum retention period for DynamoDB Streams records?

24 hours

7 days

30 days

90 days

4. How does DynamoDB Streams capture item-level modifications?

Using change data capture with BEFORE and AFTER images

By creating snapshots every minute

Through CloudTrail API logging

Using EventBridge rules

5. Which condition expression operator allows you to check if an attribute exists?

Attribute_exists()

Begins_with()

Contains()

Size()

6. What is the primary advantage of using DynamoDB on-demand billing mode?

Lower cost for predictable workloads

Pay per request without capacity planning

Guaranteed sub-millisecond latency

Automatic data replication across regions

7. Which AWS service integrates with DynamoDB to provide distributed caching?

ElastiCache

DynamoDB Accelerator (DAX)

CloudFront

AppSync

8. How does DynamoDB handle write throughput when you exceed provisioned capacity?

Automatically scales up capacity

Returns a ProvisionedThroughputExceededException

Queues requests automatically

Switches to on-demand billing

9. Which attribute would you use to implement optimistic locking in DynamoDB?

Timestamp attribute

Version number attribute

Lock ID attribute

Expiration time attribute

10. What does the BatchWriteItem operation allow you to do?

Write up to 25 items in a single request

Write unlimited items with automatic retries

Write items with strong consistency only

Write items and immediately read them back

11. Which DynamoDB attribute type is used to store a collection of unordered numbers?

Number Set (NS)

Number List (NL)

Numeric Array (NA)

Number Collection (NC)

12. How does DynamoDB Streams enable real-time application integration?

By caching read operations

By capturing item-level modifications in real-time

By replicating tables across regions

By encrypting data automatically

13. What is the maximum number of items returned by a single Query or Scan operation before pagination?

100 items

500 items

1 MB of data

10,000 items

14. Which operation retrieves a single item from DynamoDB by its primary key?

Query

Scan

GetItem

BatchGetItem

15. What is the purpose of DynamoDB Transactions?

To encrypt data in transit

To ensure ACID compliance across multiple items

To replicate data globally

To cache frequently accessed items

16. Which consistency model does DynamoDB use by default for read operations?

Strong consistency

Eventual consistency

Causal consistency

Linearizable consistency

17. What does a Global Secondary Index (GSI) in DynamoDB allow you to do?

Query data using a different partition key

Increase read capacity automatically

Replicate table data across regions

Encrypt table data at rest

18. Which AWS service can directly trigger a Lambda function when DynamoDB Streams records are generated?

SNS

SQS

DynamoDB Streams

EventBridge

19. In DynamoDB, what is the primary key component that uniquely identifies each item?

Partition key only

Sort key only

Partition key and sort key

Global secondary index

20. What is the maximum item size limit in DynamoDB?

100 KB

400 KB

1 MB

10 MB

AWS Developer DynamoDB Application Integration Quiz