Scan pagination in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a scan operation on the DynamoDB table.

DynamoDB

response = table.[1]()

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Ascan

Bquery

Cget_item

Dput_item

Attempts:

3 left

💡 Hint

Common Mistakes

Using query instead of scan for reading all items.

Trying to use get_item which requires a key.

The scan method is used to read all items in a DynamoDB table.

2fill in blank

medium

Complete the code to get the next page of results using the LastEvaluatedKey.

DynamoDB

response = table.scan(ExclusiveStartKey=[1])

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Aresponse['NextKey']

Bresponse['StartKey']

Cresponse['LastEvaluatedKey']

Dresponse['NextEvaluatedKey']

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong key name like NextKey or StartKey.

Not using ExclusiveStartKey to continue scanning.

The LastEvaluatedKey is used to continue scanning from the last position.

3fill in blank

hard

Fix the error in the code to correctly check if there are more pages to scan.

DynamoDB

if 'LastEvaluatedKey' [1] response:

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Anot in

Bin

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == or != to check for key presence.

Using not in which checks for absence.

Use in to check if the key exists in the response dictionary.

4fill in blank

hard

Fill both blanks to correctly paginate through all items in the table.

DynamoDB

while [1]:
    response = table.scan(ExclusiveStartKey=[2])
    items.extend(response['Items'])

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ALastEvaluatedKey

Bresponse.get('LastEvaluatedKey')

Cresponse['LastEvaluatedKey']

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using direct dictionary access which can cause KeyError.

Using a variable that is not updated inside the loop.

Use response.get('LastEvaluatedKey') to safely get the key or None to control the loop.

5fill in blank

hard

Fill all three blanks to implement a full scan with pagination collecting all items.

DynamoDB

items = []
start_key = [1]
while start_key [2] None:
    response = table.scan(ExclusiveStartKey=start_key)
    items.extend(response['Items'])
    start_key = response.[3]('LastEvaluatedKey')

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ANone

B!=

Cget

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Starting with an undefined start_key.

Using == instead of != in the loop condition.

Accessing LastEvaluatedKey directly causing errors.

Initialize start_key as None, loop while it is not None, and update it using get to avoid errors.