Overview.
Cloud computing has become one of the most in-demand skills, and AWS (Amazon Web Services) is the market leader. Many MNCs like Amazon, TCS, Infosys, Accenture, and Wipro actively hire freshers with basic AWS knowledge.
If you are preparing for an AWS interview as a fresher, this blog covers the most commonly asked AWS interview questions in MNCs, with simple answers that are easy to remember and explain.
Top MNCs Hiring AWS Freshers
Freshers commonly face AWS interview questions in these companies:
- Amazon
- TCS
- Infosys
- Accenture
- Wipro
Basic AWS & Cloud Concepts
1. What is AWS?
AWS is a cloud computing platform provided by Amazon that offers services like servers, storage, databases, and networking over the internet. It allows users to build and manage applications without owning physical hardware.
2. What is cloud computing?
Cloud computing means using computing resources such as servers and storage over the internet. It removes the need for local infrastructure and provides scalability and flexibility.
3. What are the main benefits of AWS?
AWS provides cost savings with pay-as-you-go pricing and easy scalability. It also offers high availability, global reach, and strong security.
4. What are the types of cloud computing?
The three main types are Public, Private, and Hybrid cloud. AWS mainly provides public cloud services to customers worldwide.
5. What are IaaS, PaaS, and SaaS?
IaaS provides infrastructure like virtual machines and storage. PaaS provides platforms for application development, and SaaS delivers ready-to-use software.
AWS Global Infrastructure
6. What is an AWS Region?
An AWS Region is a geographical area where AWS has multiple data centers. Each region is designed to be isolated for better security and reliability.
7. What is an Availability Zone?
An Availability Zone is a physically separate data center within a region. It helps in achieving high availability and fault tolerance.
8. Why does AWS use multiple Availability Zones?
Multiple AZs help applications remain available even if one data center fails. They improve reliability and disaster recovery.
9. What is an Edge Location?
Edge locations are used by AWS CloudFront to deliver content faster. They reduce latency by serving data closer to users.
Compute Services
10. What is Amazon EC2?
Amazon EC2 provides virtual servers in the cloud. It allows users to run applications with full control over the operating system.
11. What is an EC2 instance?
An EC2 instance is a virtual machine created using EC2 service. It can be customized based on CPU, memory, and storage requirements.
12. What are EC2 instance types?
Instance types are optimized for different workloads like compute, memory, or storage. Examples include general purpose, compute optimized, and memory optimized instances.
13. What is Auto Scaling?
Auto Scaling automatically increases or decreases EC2 instances based on demand. It helps maintain performance while reducing costs.
14. What is AWS Lambda?
AWS Lambda is a serverless compute service that runs code on demand. Users do not need to manage servers or infrastructure.
15. Difference between EC2 and Lambda?
EC2 requires server management and manual scaling. Lambda is serverless and automatically scales based on events.
Storage Services
16. What is Amazon S3?
Amazon S3 is an object storage service used to store files and data. It is highly scalable, durable, and cost-effective.
17. What is an S3 bucket?
An S3 bucket is a container that stores objects like files and images. Each bucket has a unique name globally.
18. What is EBS?
Elastic Block Store (EBS) provides block storage for EC2 instances. It is mainly used for operating systems and databases.
19. Difference between S3 and EBS?
S3 is object storage and is accessed over the internet. EBS is block storage and is directly attached to EC2 instances.
20. What is a snapshot in AWS?
A snapshot is a backup of an EBS volume. It is stored in S3 and can be used for recovery.
Database Services
21. What is Amazon RDS?
RDS is a managed relational database service in AWS. It handles backups, patching, and scaling automatically.
22. Which databases are supported by RDS?
RDS supports MySQL, PostgreSQL, Oracle, SQL Server, and MariaDB. Users can choose based on application needs.
23. What is DynamoDB?
DynamoDB is a fully managed NoSQL database service. It provides fast performance with automatic scaling.
24. Difference between RDS and DynamoDB?
RDS is used for structured data with SQL queries. DynamoDB is used for unstructured or key-value data.
Networking Concepts
25. What is a VPC?
VPC (Virtual Private Cloud) is a private network inside AWS. It allows users to control IP ranges, subnets, and routing.
26. What is a subnet?
A subnet is a smaller network inside a VPC. It helps organize resources and improve security.
27. Difference between public and private subnet?
Public subnet resources can access the internet directly. Private subnet resources cannot access the internet directly.
28. What is an Internet Gateway?
An Internet Gateway allows communication between a VPC and the internet. It is required for public subnets.
29. What is a NAT Gateway?
A NAT Gateway allows private instances to access the internet securely. It prevents inbound traffic from the internet.
30. What is a Security Group?
A Security Group acts as a virtual firewall for EC2 instances. It controls inbound and outbound traffic.
31. Difference between Security Group and NACL?
Security Groups work at the instance level. NACLs work at the subnet level and are stateless.
Load Balancing & Monitoring
32. What is a Load Balancer?
A Load Balancer distributes traffic across multiple servers. It improves application availability and performance.
33. Types of AWS Load Balancers?
Application Load Balancer, Network Load Balancer, and Gateway Load Balancer. Each is used for different traffic requirements.
34. What is Amazon CloudWatch?
CloudWatch monitors AWS resources and applications. It collects metrics, logs, and triggers alarms.
35. What are CloudWatch alarms?
CloudWatch alarms watch metrics and take actions. They are used for alerts and auto scaling.
Security & IAM
36. What is IAM?
IAM manages access to AWS services and resources. It helps define who can do what in AWS.
37. What is an IAM user?
An IAM user represents a person or application. It has specific permissions assigned through policies.
38. What is an IAM role?
An IAM role provides temporary permissions. It is commonly used by EC2 and Lambda.
39. What is an IAM policy?
An IAM policy is a JSON document defining permissions. It specifies allowed or denied actions.
40. What is the AWS Shared Responsibility Model?
AWS secures the cloud infrastructure. Customers are responsible for securing their data and applications.
Pricing, DevOps & Scenarios
41. What is the AWS pricing model?
AWS follows a pay-as-you-go pricing model. Users pay only for the services they use.
42. What are Reserved Instances?
Reserved Instances offer cost savings for long-term usage. They are suitable for predictable workloads.
43. What are Spot Instances?
Spot Instances provide unused EC2 capacity at lower prices. They are ideal for non-critical workloads.
44. What is AWS CLI?
AWS CLI allows managing AWS services using command line. It is useful for automation and scripting.
45. What is CloudFormation?
CloudFormation helps create AWS resources using templates. It follows the Infrastructure as Code approach.
46. What is Elastic Beanstalk?
Elastic Beanstalk automatically deploys and manages applications. It handles scaling, monitoring, and updates.
47. How can you host a static website on AWS?
A static website can be hosted using Amazon S3. CloudFront can be used for faster delivery.
48. How does AWS ensure high availability?
AWS uses multiple Availability Zones and load balancing. Auto Scaling also helps maintain availability.
49. How do you secure an EC2 instance?
Using Security Groups, IAM roles, and encryption. Regular updates and monitoring are also important.
50. Why do MNCs prefer AWS?
AWS provides scalability, cost efficiency, and global reach. It allows faster deployment and reliable infrastructure.
Tips to Crack AWS Interviews in MNCs
- Focus on basic concepts
- Answer in simple language
- Be clear with real-life examples
- Practice scenario-based questions
- Prepare 1–2 AWS mini projects
- Understand why a service is used, not just what
Final Thoughts
AWS interviews for freshers in MNCs mainly test fundamental concepts, not deep expertise. If you clearly understand EC2, S3, IAM, VPC, and basic networking, you already have a strong advantage.
For more information about AWS, you can refer to Jeevi’s page.
This tutorial is just the beginning learn AWS hands-on in our complete course. Upgrade your skills with AWS.
