DynamoDB Streams overview in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is DynamoDB Streams?

DynamoDB Streams is a feature that captures changes made to items in a DynamoDB table and stores them as a time-ordered sequence of events.

beginner

How long are records kept in DynamoDB Streams?

Records in DynamoDB Streams are kept for 24 hours before they expire and are removed.

beginner

What types of data changes does DynamoDB Streams capture?

It captures item-level changes such as inserts, updates, and deletes.

intermediate

What is a shard in DynamoDB Streams?

A shard is a container for a sequence of stream records. It helps organize and process the stream data in order.

intermediate

How can you use DynamoDB Streams in an application?

You can use DynamoDB Streams to trigger AWS Lambda functions or replicate data to other systems, enabling real-time processing of table changes.

What does DynamoDB Streams capture?

A User login events

B Network traffic logs

C Changes to items in a DynamoDB table

D Backup snapshots

DynamoDB Streams captures changes made to items in a DynamoDB table, such as inserts, updates, and deletes.

How long are records stored in DynamoDB Streams before they expire?

A 30 days

B 7 days

C Indefinitely

D 24 hours

Records in DynamoDB Streams are kept for 24 hours before they expire.

Which AWS service can be triggered by DynamoDB Streams for real-time processing?

A AWS Lambda

B Amazon S3

C Amazon EC2

D AWS CloudTrail

AWS Lambda can be triggered by DynamoDB Streams to process changes in real time.

What is a shard in the context of DynamoDB Streams?

A A backup copy of the table

B A container for a sequence of stream records

C A type of database index

D A user permission level

A shard is a container that holds a sequence of stream records in DynamoDB Streams.

Which of the following is NOT a use case for DynamoDB Streams?

A Storing large files

B Triggering workflows on data changes

C Real-time data replication

D Auditing item-level changes

DynamoDB Streams is not used for storing large files; it captures changes to table items.

Explain what DynamoDB Streams is and how it helps in managing data changes.

Think about how changes in a database can be tracked and used immediately.

Describe how DynamoDB Streams integrates with AWS Lambda and why this is useful.

Consider how automatic reactions to data changes can improve applications.