Transaction limits in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the maximum number of items allowed in a DynamoDB transaction.

DynamoDB

max_items = [1]

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

A50

B100

C10

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a number higher than 100, which exceeds DynamoDB transaction limits.

Choosing a number too low, which underestimates the allowed transaction size.

DynamoDB transactions can include up to 100 actions or items.

2fill in blank

medium

Complete the code to set the maximum size in bytes for a DynamoDB transaction request.

DynamoDB

max_transaction_size_bytes = [1]

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

A5000000

B10000000

C4000000

D2500000

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 10,000,000 bytes which is too large.

Choosing 2,500,000 bytes which is too small.

The maximum size for a DynamoDB transaction request is 4 MB (4,000,000 bytes).

3fill in blank

hard

Fix the error in the code to correctly check if the transaction size exceeds the limit.

DynamoDB

if transaction_size > [1]:
    raise Exception('Transaction size limit exceeded')

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

A4000000

B5000000

C10000000

D2500000

Attempts:

3 left

💡 Hint

Common Mistakes

Using a size larger than the limit, which won't catch the error.

Using a size smaller than the limit, which may cause false errors.

The transaction size limit is 4,000,000 bytes, so the code must compare against this value.

4fill in blank

hard

Fill the blank to create a condition that checks if the number of items in a transaction is within limits.

DynamoDB

if len(transaction_items) [1] 100:
    process_transaction()

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' which would allow too many items.

Using '==' which is too strict.

The condition should check if the number of items is less than or equal to 100 to be valid.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that filters transaction items by size and count limits.

DynamoDB

valid_items = {item['id']: item for item in transaction_items if item['size'] [1] 4000000 and len(transaction_items) [2] 100 and item['status'] [3] 'pending'}

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

A<=

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' for status which would exclude 'pending' items.

Using '>' which would allow too large sizes or too many items.

The comprehension filters items with size less than or equal to 4,000,000 bytes, total items less than or equal to 100, and status exactly 'pending'.