Return values on write in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the return values when putting an item in DynamoDB.

DynamoDB

response = table.put_item(Item=item, ReturnValues='[1]')

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

AALL_OLD

BUPDATED_NEW

CNONE

DALL_NEW

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ALL_NEW' when you want no return values causes unnecessary data to be returned.

Leaving ReturnValues empty defaults to 'NONE', but explicitly setting it is clearer.

The ReturnValues parameter controls what is returned after a write operation. 'NONE' means no attributes are returned.

2fill in blank

medium

Complete the code to return the updated attributes after updating an item.

DynamoDB

response = table.update_item(Key=key, UpdateExpression=expr, ReturnValues='[1]')

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

ANONE

BALL_NEW

CALL_OLD

DUPDATED_NEW

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'NONE' returns no attributes, so you won't see the update results.

Confusing 'ALL_OLD' with 'UPDATED_NEW' returns old attributes before update.

'UPDATED_NEW' returns only the attributes that were updated by the operation.

3fill in blank

hard

Fix the error in the code to return the entire item after a put operation.

DynamoDB

response = table.put_item(Item=item, ReturnValues='[1]')

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

ANONE

BALL_OLD

CALL_NEW

DUPDATED_NEW

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ALL_NEW' with put_item causes a syntax error.

Expecting put_item to return the new item with 'ALL_NEW' is incorrect.

For put_item, the only valid ReturnValues are 'NONE' or 'ALL_OLD'. 'ALL_NEW' is invalid and causes an error.

4fill in blank

hard

Fill both blanks to return the old item attributes after deleting an item.

DynamoDB

response = table.delete_item(Key=key, ReturnValues='[1]')
old_item = response.get('[2]')

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AALL_OLD

BAttributes

CNONE

DItem

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'NONE' returns no attributes, so old_item will be None.

Trying to access response['Item'] instead of response['Attributes'].

Setting ReturnValues to 'ALL_OLD' returns the deleted item's attributes under the 'Attributes' key in the response.

5fill in blank

hard

Fill all three blanks to update an item and get the entire new item back.

DynamoDB

response = table.update_item(Key=key, UpdateExpression=expr, ReturnValues='[1]')
new_item = response.get('[2]')
print(new_item.get('[3]'))

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

AALL_NEW

BAttributes

CName

DNONE

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'NONE' returns no attributes, so new_item will be None.

Trying to access a key not present in the updated attributes.

ReturnValues='ALL_NEW' returns the entire updated item under 'Attributes'. Accessing 'Name' gets the updated attribute value.