Transaction limits in DynamoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the maximum number of items you can include in a single DynamoDB transaction?

You can include up to 100 items in a single DynamoDB transaction.

beginner

What is the maximum size limit for a single item in a DynamoDB transaction?

Each item in a DynamoDB transaction can be up to 400 KB in size.

beginner

True or False: DynamoDB transactions can span multiple tables.

True. DynamoDB transactions can include operations on multiple tables within the same AWS account and region.

intermediate

What is the maximum total size of all items in a single DynamoDB transaction?

The total size of all items in a single DynamoDB transaction cannot exceed 4 MB.

intermediate

Why is it important to keep transaction size limits in mind when designing DynamoDB operations?

Because exceeding transaction limits causes the transaction to fail, which can affect application reliability and performance.

What is the maximum number of operations allowed in a single DynamoDB transaction?

A 25

B 100

C 50

D 10

DynamoDB transactions support up to 100 operations per transaction.

What is the maximum size of a single item in a DynamoDB transaction?

A 400 KB

B 2 MB

C 256 KB

D 1 MB

Each item in a DynamoDB transaction can be up to 400 KB in size.

Can a DynamoDB transaction include operations on multiple tables?

A No, only one table per transaction

B Yes, but only if tables are in different regions

C Yes, if tables are in the same AWS account and region

D No, transactions are limited to a single partition key

DynamoDB transactions can include multiple tables within the same AWS account and region.

What happens if a DynamoDB transaction exceeds the size or item count limits?

A The transaction fails and no changes are applied

B Only the first 25 items are processed

C The transaction is automatically split

D The transaction is queued for later processing

If transaction limits are exceeded, the entire transaction fails and no changes are made.

What is the maximum total size of all items in a single DynamoDB transaction?

A 10 MB

B 2 MB

C 1 MB

D 4 MB

The total size of all items in a single DynamoDB transaction cannot exceed 4 MB.

Explain the key transaction limits in DynamoDB and why they matter.

Think about item count, item size, total size, and multi-table support.

Describe what happens if a DynamoDB transaction exceeds its limits during execution.

Consider the atomic nature of transactions.