Pagination with SDK in DynamoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is pagination in the context of DynamoDB SDK?

Pagination means fetching data in small parts or pages instead of all at once. It helps handle large data sets efficiently and avoids timeouts or memory issues.

beginner

Which DynamoDB SDK method helps you continue fetching the next page of results?

The method uses a special value called LastEvaluatedKey. You pass this key as ExclusiveStartKey in the next request to get the next page.

beginner

Why should you avoid fetching all items in one request in DynamoDB?

Fetching all items at once can cause slow responses, timeouts, or memory overload. Pagination breaks data into smaller chunks for faster and safer processing.

beginner

How do you know when you have reached the last page of results in DynamoDB pagination?

When the response does NOT include LastEvaluatedKey, it means there are no more pages to fetch. You have reached the end of the data.

beginner

What parameter controls how many items DynamoDB returns per page?

The Limit parameter sets the maximum number of items returned in one page. You can adjust it to control page size.

In DynamoDB SDK, which key do you use to fetch the next page of results?

A NextPageToken

B LastEvaluatedKey

C StartKey

D PageNumber

DynamoDB returns LastEvaluatedKey in the response to indicate where to start the next page.

What happens if you do not use pagination and request all items at once?

A DynamoDB automatically paginates for you

B You get all data instantly without issues

C You might get timeouts or memory problems

D The query will fail immediately

Fetching too much data at once can cause timeouts or memory overload.

Which parameter do you set to limit the number of items returned per page?

A Limit

B PageSize

C MaxItems

D Count

The Limit parameter controls how many items DynamoDB returns in one request.

How do you know you have reached the last page of results?

A Response includes LastEvaluatedKey

B Response includes NextPageToken

C Response includes PageNumber

D Response does not include LastEvaluatedKey

No LastEvaluatedKey means no more pages to fetch.

What do you pass as ExclusiveStartKey in the next request?

A The LastEvaluatedKey from previous response

B The total count of items

C A random key

D The first item key from previous page

You pass LastEvaluatedKey as ExclusiveStartKey to continue from where you left off.

Explain how pagination works in DynamoDB SDK and why it is important.

Think about how you read a book page by page instead of all at once.

Describe the steps to fetch multiple pages of data using DynamoDB SDK.

Imagine turning pages until you reach the last one.