Creating a Lambda function in AWS - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the runtime environment for the Lambda function.

AWS

lambda_function = aws.lambda_.Function("MyFunction",
    runtime=aws.lambda_.Runtime.[1],
    handler="index.handler",
    code=aws.lambda_.Code.from_asset("./app")
)

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

ANODEJS_14_X

BPYTHON_3_8

CJAVA_11

DGO_1_X

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a runtime that does not match the code language.

Using an outdated or unsupported runtime.

The runtime specifies the language environment for the Lambda function. Here, NODEJS_14_X is a valid and common runtime.

2fill in blank

medium

Complete the code to set the Lambda function's handler correctly.

AWS

lambda_function = aws.lambda_.Function("MyFunction",
    runtime=aws.lambda_.Runtime.NODEJS_14_X,
    handler="[1]",
    code=aws.lambda_.Code.from_asset("./app")
)

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

Amain.handler

Bapp.main

Chandler.index

Dindex.handler

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the order of file and function names.

Using a handler name that does not exist in the code.

The handler is the entry point for the Lambda function. It usually follows the format 'file.method'. Here, 'index.handler' means the handler function inside index.js.

3fill in blank

hard

Fix the error in the code by choosing the correct method to load the Lambda function code from a local folder.

AWS

lambda_function = aws.lambda_.Function("MyFunction",
    runtime=aws.lambda_.Runtime.NODEJS_14_X,
    handler="index.handler",
    code=aws.lambda_.Code.[1]("./app")
)

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

Afrom_file

Bfrom_directory

Cfrom_asset

Dfrom_path

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like from_file or from_path.

Confusing with other AWS SDK methods.

The correct method to load code from a local folder is 'from_asset'. Other options are invalid and cause errors.

4fill in blank

hard

Fill both blanks to add environment variables to the Lambda function.

AWS

lambda_function = aws.lambda_.Function("MyFunction",
    runtime=aws.lambda_.Runtime.NODEJS_14_X,
    handler="index.handler",
    code=aws.lambda_.Code.from_asset("./app"),
    environment={
        [1],
        [2]
    }
)

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

A"STAGE": "prod"

B"ENV": "dev"

C"DEBUG": "true"

D"VERSION": "1.0"

Attempts:

3 left

💡 Hint

Common Mistakes

Passing environment variables as strings instead of dictionaries.

Using invalid JSON syntax.

The environment property expects a dictionary of key-value pairs. Here, "ENV": "dev" and "DEBUG": "true" are valid key-value pairs.

5fill in blank

hard

Fill all three blanks to create a Lambda function with a timeout, memory size, and description.

AWS

lambda_function = aws.lambda_.Function("MyFunction",
    runtime=aws.lambda_.Runtime.NODEJS_14_X,
    handler="index.handler",
    code=aws.lambda_.Code.from_asset("./app"),
    timeout=[1],
    memory_size=[2],
    description=[3]
)

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

ADuration.seconds(10)

B128

C"My Lambda function for processing"

DDuration.minutes(5)

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect Duration methods or units.

Setting memory size as string instead of number.

Omitting quotes around description string.

The timeout should be set using Duration.minutes(5) for 5 minutes. Memory size is an integer like 128 MB. Description is a string describing the function.