MCQs on Advanced AWS Lambda Features | AWS Lambda Quiz

Explore AWS Lambda MCQ questions and answers to master advanced Lambda features. This collection covers key topics such as asynchronous vs synchronous invocation, Lambda destinations for asynchronous results, Lambda layers, extensions for custom metrics, and VPC and security configurations for Lambda functions. These questions will help you deepen your knowledge for practical and certification purposes.

Advanced AWS Lambda Features MCQs

Asynchronous Invocation vs. Synchronous Invocation

1. What is the key difference between asynchronous and synchronous invocation in AWS Lambda?
   a) Synchronous invocation waits for a response; asynchronous invocation does not.
   b) Asynchronous invocation is faster than synchronous invocation.
   c) Synchronous invocation does not require any triggers.
   d) Asynchronous invocation processes events in real-time.
2. When you invoke a Lambda function synchronously, what happens?
   a) The function processes the event in the background without waiting for a response.
   b) The function is triggered automatically at a scheduled time.
   c) The caller waits for the function to complete before receiving the result.
   d) The Lambda function runs continuously until stopped.
3. Which invocation type is recommended for tasks that require real-time processing?
   a) Synchronous invocation
   b) Asynchronous invocation
   c) Event-driven invocation
   d) Scheduled invocation
4. If a Lambda function invocation is asynchronous, what does AWS Lambda do?
   a) Waits for the function to complete and returns the result.
   b) Returns an acknowledgment immediately and processes the event later.
   c) Stops the function after a fixed time period.
   d) Automatically retries the invocation every 10 minutes.
5. Which AWS service is typically used to trigger a synchronous Lambda invocation?
   a) Amazon SQS
   b) Amazon SNS
   c) API Gateway
   d) AWS Kinesis

Lambda Destinations for Asynchronous Results

6. Lambda destinations allow you to:
   a) Process the event in the background without storing it.
   b) Store the output of an asynchronous invocation.
   c) Trigger another Lambda function synchronously.
   d) Send results to a destination after processing the event asynchronously.
7. Which of the following is NOT a valid Lambda destination for asynchronous invocation results?
   a) Amazon S3
   b) AWS CloudWatch
   c) Amazon RDS
   d) Amazon SNS
8. What is the purpose of a Lambda destination in asynchronous invocation?
   a) To specify a trigger for the next invocation.
   b) To receive the result of the asynchronous execution.
   c) To manage Lambda function concurrency.
   d) To store the function’s execution logs.
9. In which scenario would you use a Lambda destination?
   a) When you want to store the function’s logs directly in Amazon S3.
   b) When you want to manage execution retries manually.
   c) When you want to route the results of an asynchronous invocation to other services.
   d) When you want to trigger the function at a scheduled time.
10. Lambda destinations can be used for which of the following?
    a) Invoking synchronous functions directly
    b) Storing execution results after function completion
    c) Triggering CloudWatch metrics
    d) Retrieving data from an S3 bucket

Layers in AWS Lambda

11. AWS Lambda Layers allow you to:
    a) Execute Lambda functions without needing triggers.
    b) Share common code and libraries across multiple Lambda functions.
    c) Store large amounts of data persistently.
    d) Manage execution logs.
12. Which of the following is the correct use of AWS Lambda Layers?
    a) To store data used by Lambda functions during execution
    b) To reduce Lambda function memory usage
    c) To add additional code libraries or dependencies for Lambda functions
    d) To create custom metrics for Lambda executions
13. A Lambda Layer is:
    a) A physical machine where Lambda functions run.
    b) A deployment package containing libraries, function code, or other dependencies.
    c) A security feature for Lambda functions.
    d) A method to increase Lambda’s execution time limit.
14. Which of the following cannot be included in a Lambda Layer?
    a) External libraries and dependencies
    b) Lambda function code
    c) Data for processing by the function
    d) Runtime-specific files
15. How many layers can a Lambda function have at most?
    a) 1
    b) 5
    c) 10
    d) 15

Lambda Extensions for Custom Metrics and Observability

16. Lambda Extensions are primarily used for:
    a) Modifying the Lambda runtime environment
    b) Retrieving logs from CloudWatch
    c) Collecting custom metrics and observability data
    d) Configuring event triggers
17. AWS Lambda Extensions allow you to:
    a) Integrate with third-party monitoring and observability tools
    b) Add more memory to Lambda functions
    c) Increase the execution timeout of Lambda functions
    d) Configure event triggers for custom workflows
18. What is the maximum duration allowed for Lambda extensions during function execution?
    a) 5 seconds
    b) 15 minutes
    c) 60 minutes
    d) The same as the Lambda function’s execution time
19. Lambda Extensions can be used with which of the following services?
    a) Amazon SNS
    b) AWS CloudWatch
    c) AWS Kinesis
    d) All of the above
20. Which AWS Lambda feature helps integrate third-party tools for monitoring Lambda executions?
    a) Lambda Destinations
    b) Lambda Extensions
    c) Lambda Layers
    d) Lambda Triggers

VPC and Security Configuration for Lambda Functions

21. To connect an AWS Lambda function to a VPC, which setting must be configured?
    a) Lambda Security Group
    b) Lambda Layer
    c) Lambda Destination
    d) Lambda Network Configuration
22. Which VPC resource does AWS Lambda require access to in order to connect securely to the VPC?
    a) VPC Subnet
    b) VPC Gateway
    c) VPC Route Table
    d) VPC Security Group
23. In which scenario would you configure a Lambda function inside a VPC?
    a) When you want the function to access private resources like RDS or EC2
    b) When you need the Lambda function to run on an EC2 instance
    c) When you want the function to run publicly on the internet
    d) When you want the function to connect directly to CloudWatch
24. What is a key advantage of running Lambda functions in a VPC?
    a) Reducing function execution time
    b) Ensuring secure access to private resources like RDS and EC2
    c) Automatically scaling functions
    d) Managing Lambda function memory allocation
25. Which of the following is NOT necessary when configuring security for a Lambda function inside a VPC?
    a) Assigning the Lambda function to a security group
    b) Ensuring the Lambda function has a VPC role with the correct permissions
    c) Configuring an Internet Gateway for outbound traffic
    d) Connecting the Lambda function to an Elastic Load Balancer

Mixed Questions

26. How can you control access to an AWS Lambda function?
    a) By setting environment variables
    b) By configuring VPC subnets
    c) By setting IAM roles and policies
    d) By enabling CloudWatch logging
27. Which AWS feature allows Lambda functions to scale automatically based on the number of invocations?
    a) Lambda Destinations
    b) VPC Security Groups
    c) Event Triggers
    d) Lambda Concurrency Scaling
28. AWS Lambda charges based on:
    a) The number of invocations and the execution duration
    b) The number of layers used
    c) The memory allocated to Lambda
    d) The number of services integrated with Lambda
29. Lambda functions can be invoked by which of the following?
    a) API Gateway
    b) CloudWatch Events
    c) SQS or SNS
    d) All of the above
30. In what scenario would you use AWS Lambda Layers?
    a) When you need to store logs outside of CloudWatch
    b) To use shared libraries and dependencies across multiple functions
    c) To store large data for processing
    d) To increase function execution time

Answers