The Geeks Area

Amazon Web Services 1. What do you know about AWS Region? An AWS Region is a completely independent entity in a geographical area. There are two more Availability Zones in an AWS Region. Within a region, Availability Zones are connected through lowlatency links. Since each AWS Region is isolated from another Region, it provides very high fault tolerance and stability. For launching an EC2 instance, we have to select an AMI within the same region. 2. What are the important components of IAM? The important components of IAM are as follows: 1.     IAM User : An IAM User is a person or service that will interact with AWS. User can sign into AWS Management Console for performing tasks in AWS. 2.     IAM Group : An IAM Group is a collection of IAM users. We can specify permission to an IAM Group. This helps in managing large number of IAM users. We can simply add or remove an IAM User to an IAM Group to manage the permissions. 3.     IAM Role : An IAM Role is an i

GIT  1.Why do we need git add command in GIT? GIT gives us a very good feature of staging our changes before commit. To stage the changes we use git add command. This adds our changes from working directory to the index. When we are working on multiple tasks and we want to just commit the finished tasks, we first add finished changes to staging area and then commit it. At this time git add command is very helpful. 2. Why do we use git reset command? We use git reset command to reset current HEAD to a specific state. By default it reverses the action of git add command. So we use git reset command to undo the changes of git add command. 3. What does a commit object contain? Whenever we do a commit in GIT by using git commit command, GIT creates a new commit object. This commit objects is saved to GIT repository. The commit object contains following information: 1.     HASH : The SHA1 hash of the Git tree that refers to the state of index at commit time. 2.