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AWS MCQ With Answers

41 practice questions · Last updated on Aug 25, 2026

Q&A guide Share:

AWS interviews reward architectural reasoning over service memorisation. Expect questions on the shared responsibility model, IAM roles versus users and policy evaluation, VPC subnets, security groups and NACLs, choosing between EC2, ECS, Fargate and Lambda, S3 versus EBS versus EFS, and designing for availability across zones. Cost control and monitoring appear in almost every cloud interview. The questions below cover the core services and the trade-offs behind choosing between them.

AWS MCQ

1.In the AWS shared responsibility model, what is AWS responsible for?

2.Who is responsible if an S3 bucket is left publicly accessible?

3.Does S3's durability guarantee protect against accidental deletion?

5.Which storage option can be mounted by many EC2 instances simultaneously?

6.What is the primary purpose of an IAM role compared with an IAM user?

7.How does IAM evaluate a request when policies conflict?

8.What do Service Control Policies in AWS Organizations provide?

9.What should be done with the AWS root account?

10.Which service provides a virtual network in which you control subnets and routing?

11.What makes a subnet public?

12.What is the key difference between a security group and a network ACL?

13.What does a VPC endpoint for S3 provide?

14.Which compute option scales to zero and charges only for execution time?

15.What is AWS Fargate?

16.When is EKS the appropriate choice over ECS or Fargate?

18.What is the main advantage of Aurora over standard RDS?

19.Which is the standard AWS pattern for high availability at reasonable cost?

20.Why is making an application stateless important for scaling on AWS?

21.What does an Auto Scaling group health check do?

22.Which service records an audit log of every AWS API call?

23.Which service provides distributed tracing across microservices?

25.Which common cloud failure cause do many engineers overlook?

26.What is the fastest way to identify what changed before an incident?

27.What does CloudFormation do if stack creation fails?

28.What is the AWS CDK?

29.What is infrastructure drift?

30.Which SQS queue type guarantees strict ordering and exactly-once processing?

31.What is the purpose of a dead letter queue?

32.Which service fans one published message out to many subscribers?

33.Which service routes events based on their content to configured targets?

34.Which is usually the fastest way to reduce an AWS bill?

35.Which AWS cost is commonly underestimated because the opposite direction is free?

36.Which pricing model suits fault-tolerant batch workloads at the lowest cost?

37.Why is resource tagging important on AWS?

38.Where should application secrets be stored on AWS?

39.Which service continuously analyses logs and network activity for signs of compromise?

40.What is the purpose of separate AWS accounts for production and development?

41.Which framework does AWS provide for evaluating architecture across cost, security, reliability and other pillars?

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