TTL with Streams for archival in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable TTL on the DynamoDB table.

DynamoDB

aws dynamodb update-time-to-live --table-name MyTable --time-to-live-specification Enabled=[1], AttributeName=expiryDate

Drag options to blanks, or click blank then click option'

ATrue

Btrue

Cenabled

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized True instead of lowercase true.

Setting Enabled to false disables TTL.

TTL is enabled by setting Enabled=true in the specification.

2fill in blank

medium

Complete the code to create a DynamoDB stream for archival.

DynamoDB

aws dynamodb update-table --table-name MyTable --stream-specification StreamEnabled=[1], StreamViewType=OLD_IMAGE

Drag options to blanks, or click blank then click option'

AFalse

Bfalse

CTrue

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized True or False.

Setting StreamEnabled to false disables the stream.

To enable streams, StreamEnabled must be set to lowercase true.

3fill in blank

hard

Fix the error in the Lambda function event handler to process DynamoDB stream records.

DynamoDB

def lambda_handler(event, context):
    for record in event['Records']:
        if record['eventName'] == '[1]':
            print('Archiving expired item')

Drag options to blanks, or click blank then click option'

AREMOVE

BDELETE

CREMOVE_ITEM

DREMOVE_RECORD

Attempts:

3 left

💡 Hint

Common Mistakes

Using DELETE instead of REMOVE.

Using non-existent event names like REMOVE_ITEM.

The event name for expired items removed by TTL is REMOVE.

4fill in blank

hard

Fill in the blank to extract the expired item and archive it.

DynamoDB

def lambda_handler(event, context):
    for record in event['Records']:
        if record['eventName'] == 'REMOVE':
            key = record['dynamodb']['[1]']
            archive_table.put_item(Item=key)

Drag options to blanks, or click blank then click option'

APartitionKey

BKeys

COldImage

DKey

Attempts:

3 left

💡 Hint

Common Mistakes

Using Keys instead of OldImage.

Using PartitionKey which is not a stream attribute.

The expired item's data is in OldImage for archiving to the archive table.

5fill in blank

hard

Fill all three blanks to filter expired items and log their IDs.

DynamoDB

def lambda_handler(event, context):
    for record in event['Records']:
        if record['eventName'] == '[1]':
            expired_item = record['dynamodb']['[2]']
            item_id = expired_item['[3]']['S']
            print(f"Expired item ID: {item_id}")

Drag options to blanks, or click blank then click option'

AREMOVE

BOldImage

Cid

DNewImage

Attempts:

3 left

💡 Hint

Common Mistakes

Using NewImage instead of OldImage.

Using wrong event name like INSERT.

Expired items trigger REMOVE events, data is in OldImage, and the ID attribute is usually named 'id'.