BACKUP & RECOVERY - 1

  BACKUP AND RECOVERY INTERVIEW QUESTIONS AND ANSWERS

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1..What is backup?

Backing up, refers to the copying and archiving of computer data so it may be used to restore the original after a loss event

2..Why we need backup?

Backups are needed in case a file or a group of files is lost. The reasons for losing files include . Hardware failure like disk breaking, accidentally deleting wrong file and  computer being stolen. Backups help in all the above situations.

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3..How to select  the  backup medium?

The most important decision regarding backups is the choice of backup medium. You  have to  consider the most important decision regarding backups is the choice of backup medium. Cost a and reliability are  the most important. A backup medium must be able to hold data without corruption for years.

4..What is simple  backup?

The simplest means of making a backup is to use tar to archive all the files on the system or only those files in a set of specific directories

5..What you mean by compressed backup?

Backups take a lot of space, which can cost quite a lot of money. To reduce the space needed, the backups can be compressed.

6..Which backup method only backs up files that have changed since the last full backup?

Differential backup will backup files that have changed since the last full backup.

7..What is the use of full backup method?

Full backup method isl always perform a full backup of all files. This takes much more time and space than other methods, but is it the most complete method and allows for easy file restoration.

8..What we can do at the time of emergency?

We should always be aware of preventive measures that reduce the impact of such

Emergencies, make backups of all important system files, We have ,  to boot the system

and access your files, or recover from backups, in an emergency. This is best accomplished with an “emergency disk,” or “root disk.”, Bootable CDROM

containing at least enough of a Linux system to be able to recover filesystems

9..What is the use of  tar?

Traditional Linux program for creating compressed collections of files; creates

convenient bundles of data that you can back up using other tools. tar is an archive utility that is used to create tape backups

10..What files need to be backed up?

Everything, and while everything but scratch files and directories needs to be saved somewhere, no need to back up the system files