Beginner Level (1–15)
1. What is AWS Lambda?
A. A virtual server
B. A container service
C. A serverless compute service
D. A database service
✅ Answer: C
2. Which AWS service is commonly used to invoke Lambda via HTTP?
A. S3
B. API Gateway
C. CloudFront
D. IAM
✅ Answer: B
3. What does “serverless” mean in AWS Lambda?
A. No servers exist
B. Servers are managed by AWS
C. No operating system
D. No cost
✅ Answer: B
4. What is the maximum execution time for a Lambda function?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. Unlimited
✅ Answer: C
5. How is AWS Lambda priced?
A. Hourly
B. Per server
C. Requests and execution duration
D. Fixed monthly cost
✅ Answer: C
6. Which runtime is supported by AWS Lambda?
A. Java
B. COBOL
C. Assembly
D. Fortran
✅ Answer: A
7. Which service stores Lambda logs by default?
A. S3
B. CloudTrail
C. CloudWatch Logs
D. X-Ray
✅ Answer: C
8. What is the default memory allocation for Lambda?
A. 64 MB
B. 128 MB
C. 512 MB
D. 1024 MB
✅ Answer: B
9. Which AWS service can trigger Lambda when an object is uploaded?
A. DynamoDB
B. SQS
C. S3
D. EC2
✅ Answer: C
10. Is AWS Lambda stateless by default?
A. Yes
B. No
C. Only with VPC
D. Only with S3
✅ Answer: A
11. What file defines the Lambda entry point?
A. main()
B. Handler
C. Runtime
D. Config
✅ Answer: B
12. Can Lambda functions run inside a VPC?
A. No
B. Yes
C. Only EC2-based Lambda
D. Only with NAT
✅ Answer: B
13. Which service manages permissions for Lambda?
A. CloudWatch
B. IAM
C. S3
D. SNS
✅ Answer: B
14. Which invocation type waits for a response?
A. Asynchronous
B. Event-based
C. Synchronous
D. Scheduled
✅ Answer: C
15. Which service is used to schedule Lambda executions?
A. SQS
B. EventBridge
C. SNS
D. Step Functions
✅ Answer: B
Intermediate Level (16–35)
16. What is a Lambda cold start?
A. Function failure
B. Initial startup latency
C. Scaling down
D. Memory overflow
✅ Answer: B
17. What happens if Lambda exceeds concurrency limits?
A. Execution slows
B. Function stops
C. Requests are throttled
D. Function retries forever
✅ Answer: C
18. What increases when you increase Lambda memory?
A. Cost only
B. Storage
C. CPU and network
D. Timeout
✅ Answer: C
19. What is Lambda concurrency?
A. Execution speed
B. Parallel executions
C. Memory size
D. Timeout limit
✅ Answer: B
20. What is the maximum memory for a Lambda function?
A. 3 GB
B. 5 GB
C. 8 GB
D. 10 GB
✅ Answer: D
21. What are Lambda Layers used for?
A. Networking
B. Sharing dependencies
C. Logging
D. Monitoring
✅ Answer: B
22. What service traces Lambda requests end-to-end?
A. CloudWatch
B. CloudTrail
C. X-Ray
D. Inspector
✅ Answer: C
23. What is the default retry count for async invocations?
A. 1
B. 2
C. 3
D. Unlimited
✅ Answer: B
24. Which service buffers events before invoking Lambda?
A. SNS
B. SQS
C. API Gateway
D. CloudFront
✅ Answer: B
25. What happens if Lambda fails when triggered by SQS?
A. Message is deleted
B. Message retries
C. Queue stops
D. Function is disabled
✅ Answer: B
26. What is provisioned concurrency?
A. Auto-scaling
B. Pre-warmed environments
C. Reserved instances
D. Memory tuning
✅ Answer: B
27. What is the /tmp directory used for?
A. Logs
B. Code storage
C. Temporary storage
D. Config files
✅ Answer: C
28. What is the max deployment package size (zip upload)?
A. 10 MB
B. 25 MB
C. 50 MB
D. 100 MB
✅ Answer: C
29. What feature allows traffic shifting between Lambda versions?
A. Layers
B. Aliases
C. Tags
D. Roles
✅ Answer: B
30. Which service secures secrets for Lambda?
A. Parameter Store
B. Secrets Manager
C. KMS
D. IAM
✅ Answer: B
31. What service supports fan-out patterns with Lambda?
A. SQS
B. SNS
C. DynamoDB
D. EC2
✅ Answer: B
32. What happens when a Lambda function times out?
A. Retries immediately
B. Execution stops
C. Memory resets
D. Logs deleted
✅ Answer: B
33. Which service enables Infrastructure as Code for Lambda?
A. CloudFormation
B. Inspector
C. Trusted Advisor
D. OpsWorks
✅ Answer: A
34. What is the environment variable size limit?
A. 1 KB
B. 2 KB
C. 4 KB
D. 10 KB
✅ Answer: C
35. Which invocation type does S3 use?
A. Synchronous
B. Asynchronous
C. Polling
D. Streaming
✅ Answer: B
Advanced / Exam Level (36–50)
36. What is Lambda@Edge used for?
A. Database access
B. Edge computing with CloudFront
C. Container execution
D. Load balancing
✅ Answer: B
37. Which service supports event-driven architectures?
A. EC2
B. EventBridge
C. EBS
D. VPC
✅ Answer: B
38. What increases cold start latency?
A. Smaller package
B. Provisioned concurrency
C. VPC configuration
D. Frequent invocations
✅ Answer: C
39. What captures failed async events?
A. CloudWatch
B. DLQ
C. X-Ray
D. IAM
✅ Answer: B
40. What service supports container images for Lambda?
A. ECS
B. ECR
C. EKS
D. Fargate
✅ Answer: B
41. Max Lambda container image size?
A. 1 GB
B. 5 GB
C. 10 GB
D. 15 GB
✅ Answer: C
42. Which principle should Lambda IAM roles follow?
A. Admin access
B. Least privilege
C. Full access
D. Read-only
✅ Answer: B
43. Best way to reduce Lambda cost?
A. Increase memory
B. Reduce timeout
C. Set concurrency limits
D. Use EC2
✅ Answer: C
44. Which service enables orchestration of Lambda workflows?
A. SNS
B. Step Functions
C. SQS
D. Batch
✅ Answer: B
45. Which certification focuses most on Lambda?
A. Cloud Practitioner
B. SysOps Admin
C. Developer Associate
D. Security Specialty
✅ Answer: C
46. Lambda is best suited for which architecture?
A. Monolithic
B. Event-driven
C. Legacy
D. Stateful
✅ Answer: B
47. What happens if reserved concurrency is set to zero?
A. Function scales infinitely
B. Function is throttled
C. Function is disabled
D. Function retries
✅ Answer: C
48. Which service tracks API calls to Lambda?
A. CloudWatch
B. CloudTrail
C. X-Ray
D. Inspector
✅ Answer: B
49. Which AWS service allows blue/green deployments for Lambda?
A. CodeDeploy
B. CodeBuild
C. CodeCommit
D. CodePipeline
✅ Answer: A
50. Which AWS service is NOT a Lambda trigger?
A. S3
B. DynamoDB
C. SNS
D. EBS
✅ Answer: D
Final Tip.
In exam questions, AWS almost always prefers:
Managed + Serverless + Event-Driven
Lambda is often the best answer when those words appear.
This tutorial is just the beginning learn AWS hands-on in our complete course. Upgrade your skills with AWS.
