Expression attribute values in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an expression attribute value for a DynamoDB query.

DynamoDB

expression_attribute_values = {':val': [1]

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

AJohn

B:John

C"John"

D'John'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around string values.

Using single quotes instead of double quotes.

The expression attribute value must be a string enclosed in double quotes to be valid in DynamoDB queries.

2fill in blank

medium

Complete the code to set a numeric expression attribute value for a DynamoDB update.

DynamoDB

expression_attribute_values = {':num': [1]

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

A"123"

B123

C'123'

D:123

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers inside quotes, making them strings.

Adding colons inside the value.

Numeric values in expression attribute values should be provided as numbers without quotes.

3fill in blank

hard

Fix the error in the expression attribute values dictionary to correctly represent a boolean value.

DynamoDB

expression_attribute_values = {':active': [1]

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

A"true"

B"True"

Ctrue

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase true without quotes (invalid in Python).

Using strings instead of boolean literals.

Boolean values in DynamoDB expression attribute values must be Python booleans without quotes.

4fill in blank

hard

Fill both blanks to create expression attribute values for a string and a number.

DynamoDB

expression_attribute_values = {':name': [1], ':age': [2]

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

A"Alice"

B25

D'Alice'

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings.

Putting numbers inside quotes.

The string value must be in double quotes, and the number should be a plain number without quotes.

5fill in blank

hard

Fill all three blanks to define expression attribute values for a string, a boolean, and a number.

DynamoDB

expression_attribute_values = {':user': [1], ':isAdmin': [2], ':score': [3]

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

A"Bob"

BTrue

C100

D'Bob'

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings.

Using strings for booleans.

Putting numbers inside quotes.

Strings use double quotes, booleans use Python literals without quotes, and numbers are plain numbers.