Software Security

19.  What is password?
Ans: A password is a secret word or phrase that gives a user access to a particular program or system.

20.  Write any four criteria for a strong password.

Ans: Any four criteria for strong password are:

·       Do not keep a password which can be easily guessed such as date of birth, nickname, etc.

·       Do not keep word as password that is currently popular.

·       Keep a password with mixture of alphabet and numbers which is difficult to guess.

·       Keep changing your password regularly.

21.  What is password policy?
Ans: A set of rules designed to enhance computer security by encouraging user to employee strong passwords and use them properly is called password policy.

22.  What should be done to protect the system form unauthorized access?
Ans: To protect a system from unauthorized access, password should be kept in a system which provides security to the system. A password should be difficult to guess and determine and should be changed regularly and memorized.

23.  What is backup?
Ans: Backup is a copy of a file which is used in the event of the original file being corrupted.

24.  Why is backup vital to computer system?
Ans: Backup is essential to computer security system to recover the important data and programs from accidental and intentional harm. They are stored in different storage devices like hard disk, CDs and pen drives. When the data and software gets lost or damaged the backup system helps to recover the lost or damaged data or software from the backup copy of data and software.

25.  How can software prevent data loss?
Ans: Software prevents the data loss by the following ways:
i) Antivirus software can detect and remove virus from the computer.
ii) Scan disk checks folders, bad sector and other error of the disk and fix them.
iii) Software for backup helps in securing the information by keeping backup.

26.  What is scan disk?
Ans: Scan disk is a process which involves in maintaining the disk files and folders using a kind of utility software which checks files, folders, bad sectors, lost clusters, lost chains and any errors of the specific disk and  can fix them if it is possible.

27.  What is defragmentation?
Ans: The process of re-writing parts of a file to contiguous sectors on a hard disk to increase the speed of access and retrieval is called defragmentation.

28.  What is fragmentation?
Ans: The scattering of the parts of the same disk file over different location is called fragmentation.