Know All About AWS Interview Questions: EC2

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Here are some interview questions with explanation:

Explain EC2 and EC2 instance

EC2 is a Elastic Compute Cloud of Amazon web service providing a interface in AWS cloud which has resizable compute capacity.  It helps in controlling web scaling and computing resources to developers.

Tell us more about stages of creating EC2

1. The first step is selecting in AWS management console the EC2 service.
2. Start the instance  creation wizard.
3. Select appropriate AMI and instance size and click on configure instances details.
4. Then set up storage and configure tags for the instance.
5. Lastly,  open ports,  review your configuration and then click on the launch button.

Difference between Public IP and EIP

EIP are designed for dynamic cloud computation, it is a static IP.  It helps you to control the address associated with your account. 

Public IP is attached to AWS EC2 instance which is a usual IP address.  It helps the instances on internet to host resources.

What is Auto scaling?

Auto scaling allows organizations to automatically add or remove EC2 instances to maintain the consistency of application delivery to its customers. It helps in cutting the cost and scale the computing service horizontally as per changing demand of the organization. Offered by EC2 auto scaling is an important feature of AWS.

Concept of AWS Elastic Load balancer.

A load balancer routes requests to registered targets like EC2 instance, lambda functions, containers,  virtual appliances, and IP address in which is a incoming traffic from the clients.  It routes requests in one or more availability zone. It continues to do so after detecting that the target is healthy.  The amazon web services has created it in four distinct models as a virtual load balancer. The different models provides high availability in different zones of availability.  It ensures that the applications are tolerant for faults and errors. 

What is security group?

Security group is a stateful filtering offered by amazon web services working as a software fire wall in the network interface like attached to EC2.  It helps the owner to create allow the traffic which he or she wants in his or her network interface.  It can easily be attached to several network interfaces despite the fact that they can have same VPN.

Explain AWS EC2 placement group

The placement group is used to avoid the risk of failures of correlated hardware.  It places the highly available  EC2 instances at different physical servers strategically. It is useful as physical servers can be of different availability zone or part of different partitions.

Define root volume device and EBS snapshots

Root volume device is a boot volume instance containing applications,  operating system and configuration. It is associated with AMI and simply a EBS volume created by EBS snapshot. 

EBA snapshots works for EBS volume as its incremental backup.  It is stored AWS managed S3 buckets. Organizations use it for creating snapshot of EBS volume for restoring data and volume in the situation of data getting lost or corrupted.