AWS EC2 interview questions and answers

What is Amazon EC2?
AWS Interview Questions and Answers

Amazon Elastic Compute Cloud (EC2) is a web service that provides scalable computing capacity in the cloud. It allows businesses to easily provision and manage virtual servers, known as instances, on demand.

What are the benefits of using Amazon EC2?

The benefits of using Amazon EC2 include scalability, flexibility, cost-effectiveness, reliability, and security. It allows businesses to easily provision and manage virtual servers and provides a range of instance types and sizes to meet various workload requirements.

What are the types of instances available in Amazon EC2?

Amazon EC2 offers a wide range of instance types, including general-purpose, compute-optimized, memory-optimized, storage-optimized, GPU instances, and FPGA instances. Each instance type is designed to cater to specific workload requirements.

How do you launch an instance in Amazon EC2?

To launch an instance in Amazon EC2, you need to choose an Amazon Machine Image (AMI), select an instance type, configure security settings, and create a key pair. You can then launch the instance, which will be assigned a public IP address and can be accessed using SSH or RDP.

How do you connect to an Amazon EC2 instance?

To connect to an Amazon EC2 instance, you can use SSH for Linux instances or RDP for Windows instances. You will need to use the key pair that you created when launching the instance to authenticate and access the instance.

What is an Amazon Machine Image (AMI)?

An Amazon Machine Image (AMI) is a pre-configured virtual machine image that is used to create an instance in Amazon EC2. It contains the necessary information to launch and run an instance, including the operating system, applications, and data.

How do you create an AMI?

To create an AMI, you need to launch an instance, configure it as required, and then create an image of the instance. You can then use this image to launch new instances with the same configuration.

How do you resize an instance in Amazon EC2?

To resize an instance in Amazon EC2, you need to stop the instance, change the instance type, and then start the instance. This will result in the instance being launched with the new instance type and the same configuration.

What is an Elastic IP address?

An Elastic IP address is a static, public IPv4 address that can be assigned to an instance in Amazon EC2. It can be remapped to a different instance in the same account, which makes it easier to maintain consistent IP addresses for applications and services.

What is Auto Scaling?

Auto Scaling is a feature of Amazon EC2 that automatically scales compute resources based on demand. It allows businesses to automatically increase or decrease the number of instances based on predefined rules.

How does Auto Scaling work?

Auto Scaling works by monitoring resource usage and scaling up or down instances based on predefined rules. It can be configured to scale based on CPU utilization, network traffic, or other metrics.

What is Load Balancing?

Load Balancing is a feature of Amazon EC2 that distributes incoming traffic across multiple instances to improve availability and fault tolerance. It allows businesses to easily scale their applications and services without the need for manual intervention.

What is Amazon Elastic Block Store (EBS)?

Amazon Elastic Block Store (EBS) is a block storage service that provides persistent storage for Amazon EC2 instances. It allows businesses to store and retrieve data from the cloud with ease.

What is Amazon Elastic File System (EFS)?

Amazon Elastic File System (EFS) is a managed file storage service that provides scalable, shared file storage for Amazon EC2 instances. It allows businesses to easily store and retrieve files from the cloud, without the need

What is Amazon EC2 Instance Metadata?

Amazon EC2 Instance Metadata is a service that provides information about an EC2 instance, including its instance ID, public and private IP addresses, and instance type. It can be accessed using a special URL from within the instance.

What is an Instance Store Volume?

An Instance Store Volume is a temporary block storage that is attached to an EC2 instance. It is ideal for temporary data storage that can be lost if the instance is stopped or terminated.

What is an Amazon Machine Image (AMI) Marketplace?

The Amazon Machine Image (AMI) Marketplace is a curated collection of AMIs that can be used to launch EC2 instances. It includes pre-built images from AWS partners and third-party vendors.

What is AWS Lambda?

AWS Lambda is a compute service that runs code in response to events and automatically manages the compute resources required for that code. It allows businesses to easily run code without the need to provision and manage servers.

What is Amazon Elastic Container Service (ECS)?

Amazon Elastic Container Service (ECS) is a fully-managed container orchestration service that allows businesses to easily run and manage Docker containers on EC2 instances.

What is Amazon Lightsail?

Amazon Lightsail is a simple, easy-to-use cloud platform that provides virtual private servers, storage, and networking for small-scale applications and projects. It is designed for customers who need a low-cost, easy-to-use cloud solution.

What is AWS Batch?

AWS Batch is a fully-managed batch processing service that allows businesses to run batch computing workloads on EC2 instances. It automatically provisions and scales compute resources, and allows businesses to easily run jobs with dependencies and timing requirements.

What is AWS Outposts?

AWS Outposts is a hybrid cloud service that allows businesses to run AWS infrastructure on-premises. It provides access to the same hardware, software, and services as the AWS cloud, but with the added control and security of on-premises infrastructure.

What are Amazon EC2 Auto Scaling Groups?

Amazon EC2 Auto Scaling Groups is a feature that automatically scales EC2 instances based on predefined rules. It allows businesses to maintain optimal performance and cost-effectiveness by automatically adding or removing instances based on demand.

What is an Amazon Elastic Network Interface (ENI)?

An Amazon Elastic Network Interface (ENI) is a virtual network interface that can be attached to an EC2 instance. It allows businesses to easily attach multiple network interfaces to an instance, which can be used to create more complex networking configurations.

What is Amazon EC2 Instance Connect?

Amazon EC2 Instance Connect is a feature that allows businesses to securely connect to EC2 instances using SSH or RDP. It eliminates the need for managing and storing SSH keys, and provides an auditable trail of access to instances.

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