Why CRUD operations are foundational in DynamoDB - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new item in a DynamoDB table.

DynamoDB

response = table.[1](Item={'UserId': '123', 'Name': 'Alice'})

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

Aput_item

Bget_item

Cdelete_item

Dupdate_item

Attempts:

3 left

💡 Hint

Common Mistakes

Using get_item instead of put_item

Using update_item without an existing item

The put_item method adds a new item to the table.

2fill in blank

medium

Complete the code to read an item from a DynamoDB table by its key.

DynamoDB

response = table.[1](Key={'UserId': '123'})

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

Aput_item

Bget_item

Cdelete_item

Dupdate_item

Attempts:

3 left

💡 Hint

Common Mistakes

Using put_item to read data

Using delete_item instead of get_item

The get_item method retrieves an item by its key.

3fill in blank

hard

Fix the error in the code to update an existing item in DynamoDB.

DynamoDB

response = table.[1](Key={'UserId': '123'}, UpdateExpression='SET Age = :age', ExpressionAttributeValues={':age': 30})

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

Aget_item

Bput_item

Cupdate_item

Ddelete_item

Attempts:

3 left

💡 Hint

Common Mistakes

Using put_item which replaces the whole item

Using get_item which only reads data

The update_item method updates attributes of an existing item.

4fill in blank

hard

Fill both blanks to delete an item by key and confirm the operation.

DynamoDB

response = table.[1](Key=[2])

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

Adelete_item

B{'UserId': '123'}

C{'Name': 'Alice'}

Dput_item

Attempts:

3 left

💡 Hint

Common Mistakes

Using put_item instead of delete_item

Providing wrong key structure

delete_item removes the item with the specified key from the table.

5fill in blank

hard

Fill all three blanks to create an item and then read it back.

DynamoDB

table.[1](Item={'UserId': '456', 'Name': 'Bob'})
response = table.[2](Key=[3])

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

Aput_item

Bget_item

C{'UserId': '456'}

Ddelete_item

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up method names

Using wrong key format

This sequence creates an item, reads it back, and the key is used to identify the item.