AWS Interview Questions Answers EC2 #3 | AWS Tamil
Channel: Tamil Cloud
Date: 2019-09-08

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AWS Interview Questions Answers EC2  PART -3
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        21)  We can connect single EBS volume to multiple instance?  Max Limit for EBS volume

   We can’t able to connect EBS volume to multiple instance, but we can able to connect multiple EBS Volume to single instance. Max 27 EBS attach to Single instance ( 28 attachment - 1network interface)

           
 22) What Process to mount EBS to EC2 instance
            sudo mkfs -t xfs /dev/xvdf
     sudo mkdir /data
     sudo mount /dev/xvdf /data
            sudo blkid
            sudo vim /etc/fstab 
                             UUID=aebf131c-6957-451e-8d34-ec978d9581ae  /data  xfs  defaults,nofail  0  2
 

         23)Can resize EBS Root volume on Running EC2?  What Process 
   
              Yes, we can resize EBS Root volume 
             Nitro System
               sudo growpart /dev/nvme0n1 1
        sudo resize2fs /dev/nvme0n1p1 

        sudo growpart /dev/xvda 1
        sudo resize2fs /dev/xvda1

         24) What is Security Group?
               
             EC2 instance first lawer of security . you can control who is access to which port on your ec2
      
        25) What is placement Group?
                
             You can control Ec2 instance launch same system or different system on AWS Availabity Zone. 

        26) What is User Data?
            Bootstrap for your EC2 instance . (Startup script )

        27) you Can Optimizing EC2  CPU core?
           
          Yes we can. Optimizing CPU Options available on EC2 Launch time only , from CLI or Console

        28) What is KMS? Types and Used for?
        
          KMS - Key management system. 1) AWS managed 2) Customer manged 3) Customer Own Key
          It allow encrypt your data like EBS , S3, AMI
          
        29) Can encrypt root EBS volume on EC2 instance?

            Yes we can, EC2 Launch time we will encrypt the volume

 30) Does Amazon EC2 NVMe instance storage support AWS Key Management Service (KMS)?

 No, disk encryption on NVMe instance storage does not support integration with AWS KMS system. Customers cannot bring in their own keys to use with NVMe instance storage.