Interview Questions on AWS Elastic Compute Cloud (EC2)

Interview Questions On AWS Elastic Compute Cloud(EC2)

1. What is Amazon EC2?

2. What are EC2 instances?

  • EC2 instances are virtual machines (VMs) that run on Amazon Web Services infrastructure. They are the backbone of Amazon EC2 service and provide the computing capacity for your applications.

3. What is an Amazon Machine Image (AMI)?

  • An Amazon Machine Image (AMI) is a pre-configured virtual machine image, used to create EC2 instances. It contains all the information necessary to launch an instance, including the operating system, application server, and any additional software required to run the application.

4. What is an EC2 instance type?

  • EC2 instance type refers to the hardware configuration of an EC2 instance. EC2 instances are available in various instance types, each with different computing, memory, and storage capabilities.

5. What is Auto Scaling in EC2?

  • Auto Scaling is a feature of Amazon EC2 that allows you to automatically increase or decrease the number of instances based on changes in demand for your application. This helps to ensure that your application has the resources it needs to meet changing demands, while also keeping costs under control.

6. What is Amazon Elastic Block Store (EBS)?

  • Amazon Elastic Block Store (EBS) is a persistent block-level storage service for use with Amazon EC2 instances. EBS volumes provide raw block-level access to your data, which you can use to store application data, databases, and file systems.

7. What is Amazon EC2 Security Group?

  • Amazon EC2 Security Group is a virtual firewall that controls inbound and outbound traffic to an Amazon EC2 instance. It acts as a firewall for your instance, allowing you to control network access to your instances.

8. What is Amazon EC2 Key Pair?

  • Amazon EC2 Key Pair is a secure way to log into your EC2 instances. You use a private key to log in to an EC2 instance, and you use a public key to encrypt your private key. The public and private key are paired, and you cannot log in to an instance without both keys.

9. What is an Elastic IP address in EC2?

  • An Elastic IP address is a static IP address designed for dynamic cloud computing. You can associate an Elastic IP address with a running EC2 instance or a network interface, and you can control the IP address even if you stop and start the instance or move the instance to a different network interface.

10. What is EC2 Placement Group?

  • EC2 Placement Group is a logical grouping of EC2 instances within a single Availability Zone. Placement groups enable you to place your instances closer together, reducing network latency and increasing network throughput.

11. What is Amazon EC2 Spot Instances?

  • Amazon EC2 Spot Instances allow you to bid on unused EC2 capacity and run your applications at a lower cost compared to On-Demand instances. Spot Instances are ideal for flexible, fault-tolerant applications that can be interrupted.

12. What is EC2 Auto Recovery?

  • EC2 Auto Recovery is a feature of Amazon EC2 that automatically recovers instances that have failed due to hardware issues. EC2 Auto Recovery automatically replaces the failed instances with healthy instances to minimize the impact of hardware failures.

13. What is Amazon EC2 User Data?

  • Amazon EC2 User Data is data that you can pass to an EC2 instance at launch time. You can use user data to pass a script to be executed during launch, configure the instance, or pass other data to your instances.

14. Can you explain EC2 instance store?

  • EC2 instance store, also known as instance-backed storage, is a temporary storage option for Amazon EC2 instances. Instance store provides non-persistent storage for instances, which means that the data stored on an instance store volume is lost when the instance is stopped or terminated.

15. What is EC2 Dedicated Instances?

  • EC2 Dedicated Instances are Amazon EC2 instances that

run on hardware that is dedicated to a single customer. These instances are isolated from other instances and are dedicated to running your workloads, providing you with increased security and performance compared to other EC2 instance types.

16. What is EC2 T2 Instances?

  • EC2 T2 instances are general-purpose instances that are designed to provide a balance of compute, memory, and network resources, and are suitable for small-to-medium sized applications. T2 instances are a good choice for applications with low to moderate CPU usage and provide a baseline level of CPU performance that can be burst as required by the workload.

17. What is EC2 M5 Instances?

  • EC2 M5 instances are the latest generation of general-purpose instances in Amazon EC2. They offer a balance of compute, memory, and network resources, and are designed for applications that demand high performance and low latency.
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18. What is EC2 R5 Instances?

  • EC2 R5 instances are the latest generation of memory-optimized instances in Amazon EC2. They are designed for memory-intensive applications, such as high-performance databases, distributed memory caches, in-memory analytics, and other applications that require high levels of memory and low latency.

19. What is EC2 I3 Instances?

  • EC2 I3 instances are the latest generation of storage-optimized instances in Amazon EC2. They are designed for applications that require high, fast, and consistent I/O performance, such as NoSQL databases, data warehousing, and Hadoop/Spark clusters.

20. What is EC2 GPU instances?

  • EC2 GPU instances are Amazon EC2 instances that are optimized for GPU-accelerated workloads, such as machine learning, scientific computing, and data processing. EC2 GPU instances provide access to high-performance GPUs, making them ideal for a wide range of compute-intensive applications.

21. What is EC2 Nitro System?

  • The EC2 Nitro System is a combination of dedicated hardware and software components that provide the underlying infrastructure for Amazon EC2 instances. The Nitro System provides high performance and security, and enables the delivery of new EC2 instance capabilities, such as local storage, and higher network and storage performance.

22. What is EC2 Instance Connect?

  • EC2 Instance Connect is a feature of Amazon EC2 that allows you to securely connect to your instances using Secure Shell (SSH). EC2 Instance Connect eliminates the need to manage SSH keys, and makes it easy to securely connect to instances.

23. What is EC2 Instance Metadata?

  • EC2 Instance Metadata is data about your EC2 instances that you can access from within the instances. Instance metadata includes information such as the instance ID, VPC ID, subnet ID, and more. You can access instance metadata using the EC2 metadata service.

24. What is EC2 instance lifecycle?

  • The EC2 instance lifecycle consists of several stages, including launch, run, stop, and terminate. The EC2 instance lifecycle is managed by Amazon EC2, and you can control the lifecycle of your instances through the EC2 console or APIs.

25. Can you explain EC2 instance Types?

  • EC2 instance types are the various hardware configurations available for EC2 instances. EC2 instance types are optimized for different workloads, such as compute-intensive, memory-intensive, storage-intensive, and GPU-accelerated workloads. EC2 instances are available in several families, including T, M, R, I, G, and P, each of which is optimized for a specific use case.
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