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प्रश्न
Explain Virus Detection, Removal and Prevention
Discuss Virus Detection, Virus Removal and Prevention Philosophies
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उत्तर
Explanation:
(1) Virus detection
(i) Normally virus detection program checks integrity of binary files. It maintains a checksum on each file. At regular frequency detection program calculates checksum and matches with original one. If there is mismatch then that program may be infected.
(ii) Some programs reside in the memory and continuously monitor memory and I/O operations against virus.
(2) Virus removal
There are some viruses whose bit pattern in the code can be predicted. The virus removal program scans the disk for the patterns of known viruses and on detection it removes them.
(3) Virus prevention
For prevention of virus the user can take the following precautions
(i) Always buy legal copies of software.
(ii) Take frequent backups of data
(iii) Run monitor programs frequently to detect virus.
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संबंधित प्रश्न
Give three differences between WORM and VIRUS.
What is File System?
What is Virtual Memory ? Explain any three terms related to virtual memory.
With reference to process management. Explain the terms :
(i) Internal Priority
(ii) External Priority
(iii) Purchase Priority
(iv) Time Slice
The time lost in turning the attention of processor from one process
to another is called as ________
(i) Circuit Switching
(ii) Band Width
(iii) Context Switching
(iv) Packet Switching
State the various steps involved in the allocation of partition in case of fixed partition memory management.
List and explain types of File Systems used in OS.
What is VDU?
Explain the following process state:
Ready State
Define Security
Explain following terms in case of Process Scheduling
1) Turn-around Time
2) Waiting Time
3) Terminal Response Time
4) Event Response Time
Write the difference between Worm and Virus.
What are the functions of Memory Management? State any two types of continuous Real Memory Management System.
Match the following.
| 'A' | 'B' |
| (1) IS | (a) change directory |
| (2) FTP | (b) Translates Network Address |
| (3) CD | (c) List of Directory |
| (4) DNS | (d) To transfer file on interent |
Identify the usage of Operating Systems.
List out the key features of the Operating system?
From the options given below, choose the operations managed by the operating system.
Which operating system is installed on your computer at home or school?
