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प्रश्न
Explain virus detection.
Discuss virus detection philosophy.
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उत्तर
The primary goal of virus detection is to maintain system integrity through proactive prevention and real-time monitoring. This is achieved by utilising integrity checking, in which detection programs maintain a unique checksum for every binary file and periodically verify it to detect unauthorised modifications. Furthermore, detection tools reside in system memory to continuously monitor I/O operations and system calls, enabling them to detect suspicious activity based on behaviour rather than just known signatures. The core philosophy centres on a layered defence that balances the need to block new, unknown threats (Heuristic-based) with the need to minimise false positives to ensure smooth system performance.
संबंधित प्रश्न
The time required to move RIW Head to the particular track is called ---
(i) Latency Time
(ii) Seek Time
(iii) Waiting Time
(iv) Response Time
Give three differences between WORM and VIRUS.
What is System Call ? List any two System Calls for Memory Management, Process Management and Information Management.
Explain Multiuser and Time Sharing Operating Systems.
Give features of Windows 98 Operating System.
Context Switching is a term related to........... Management
(i) Process
(ii) Memory
(iii) Information
(iv) Device
Explairt the process of Multiprogramming in Process Management with help of an example.
What is Virtual Memory ? Explain any three terms related to virtual memory.
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
What is Computer Virus?
If the page size for 2MB memory is 2KB then the number of higher order bits on address bus used to denote page number is________.
(i) 11
(ii) 10
(iii) 9
(iv) 8
List and explain types of File Systems used in OS.
Explain following terms of VDU: Dumb Terminal
Explain the following process state:
Ready State
Explain the following process state:
Blocked State
Write a short note on Paging.
With reference to process management, explain the term:
External Priority
From the options given below, choose the operations managed by the operating system.
Differentiate Save and Save As option.
