Lambda handler function structure in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the AWS Lambda handler function name.

AWS

def [1](event, context):
    return 'Hello from Lambda!'

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

Ahandle_event

Blambda_handler

Cmain

Dprocess

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name not matching the handler setting.

Forgetting to define the handler function.

The AWS Lambda function handler must be named as specified in the configuration, commonly lambda_handler.

2fill in blank

medium

Complete the code to accept the event parameter in the Lambda handler function.

AWS

def lambda_handler([1], context):
    print(event)
    return 'Done'

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

Actx

Binput

Cevent

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter names that do not match AWS Lambda expectations.

Swapping the order of parameters.

The first parameter of the Lambda handler function is event, which contains the input data.

3fill in blank

hard

Fix the error in the Lambda handler function definition by completing the missing parameter.

AWS

def lambda_handler(event, [1]):
    print('Context:', context)
    return 'Success'

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

Acontext

Bdata

Cinfo

Dctx

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter names for context.

Omitting the context parameter.

The second parameter must be named context to access runtime information.

4fill in blank

hard

Fill both blanks to correctly return a JSON response with status code and body.

AWS

def lambda_handler(event, context):
    response = {
        'statusCode': [1],
        'body': [2]
    }
    return response

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

A200

B'{"message": "OK"}'

C404

D'Success'

Attempts:

3 left

💡 Hint

Common Mistakes

Using numeric status code as string.

Returning body as a Python dict instead of JSON string.

The status code 200 means success, and the body must be a JSON string.

5fill in blank

hard

Fill all three blanks to parse a key from the event and return it in the response body.

AWS

def lambda_handler(event, context):
    key_value = event.get([1], None)
    response = {
        'statusCode': [2],
        'body': f"Value is: { [3] }"
    }
    return response

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

A'key'

B200

Ckey_value

D'value'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong key string.

Not converting the value to string in the body.

Using incorrect status code.

We get the value for 'key' from the event, return status 200, and include the value in the body.