Environment variables in Lambda in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an environment variable named 'STAGE' with value 'prod' in the Lambda function configuration.

AWS

Environment: {
  Variables: {
    "STAGE": [1]
  }
}

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

Aprod

B"prod"

C'prod'

DSTAGE

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string value.

Using single quotes instead of double quotes in JSON.

The environment variable value must be a string enclosed in double quotes in JSON.

2fill in blank

medium

Complete the AWS CLI command to update the Lambda function 'MyFunction' to set an environment variable 'MODE' to 'test'.

AWS

aws lambda update-function-configuration --function-name MyFunction --environment Variables=[1]

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

A{"MODE":"test"}

B"MODE=test"

C{MODE:test}

DMODE=test

Attempts:

3 left

💡 Hint

Common Mistakes

Passing environment variables as plain text without JSON formatting.

Using single quotes or missing quotes around keys or values.

The environment variables must be passed as a JSON object string with keys and values in double quotes.

3fill in blank

hard

Fix the error in the Lambda function environment variable configuration to correctly set 'API_KEY' to '12345'.

AWS

Environment: {
  Variables: {
    API_KEY: [1]
  }
}

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

A12345

B'12345'

CAPI_KEY

D"12345"

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted numbers or strings in JSON environment variables.

Using single quotes instead of double quotes.

In JSON, string values must be enclosed in double quotes to be valid.

4fill in blank

hard

Fill both blanks to create a Python Lambda handler that reads environment variables 'DB_HOST' and 'DB_PORT'.

AWS

import os

def lambda_handler(event, context):
    host = os.environ.get([1])
    port = os.environ.get([2])
    return f"Connecting to {host} on port {port}"

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

A"DB_HOST"

B"DB_PORT"

CDB_HOST

DDB_PORT

Attempts:

3 left

💡 Hint

Common Mistakes

Passing variable names without quotes causing NameError.

Mixing up the variable names.

Environment variable names must be passed as strings to os.environ.get().

5fill in blank

hard

Fill all three blanks to define a CloudFormation snippet that sets environment variables 'ENV', 'VERSION', and 'DEBUG' for a Lambda function.

AWS

Environment:
  Variables:
    ENV: [1]
    VERSION: [2]
    DEBUG: [3]

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

A"production"

B"1.0.0"

C"false"

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted boolean false instead of string "false".

Missing quotes around version or environment name.

All environment variable values must be strings in CloudFormation, so use double quotes around each value.