Public Service CommissionNepal Rastra Bank, Open Competitive Written Examination for Technician, Information Technology, Assistant Second (Information Technology) Posts2081/01/19
Paper: First
Subject: Information Technology-I
The answer of each section should be written in a separate answer book. Otherwise the answer sheet will be cancelled.
Subjective: Time: 2 hours
Total Marks: 75
Section "A" 30 Marks
1. Briefly explain the characteristics of computer that makes it a useful device for any organization. 5
2. What is Disaster Recovery? Briefly explain about different backup methods. 2+3=5
3. What is an IC? Why are ICs so cheap? Why are ICs widely used in modern electronic device? Explain. 1+1+3=5
4. Explain about the working principle of Zener diode. 5
5. What are the common security threats in cyber space? Explain. What measures should be taken to mitigate these threats? Discuss. 5+5=10
Section "B" 45 Marks
6. What is an interrupt in computing? Explain how processor handles an interrupt. 1+4=5
7. List the syntax, purpose and examples of any ten DOS commands. 5
8. Discuss the concept and importance of IP addressing. What are the differences between IPv4 and IPv6 addresses? Write. 3+2=5
9. What is VPN? When would you use a VPN? How does it enhance network security? Explain. 1+2+2=5
10. What is data compression? Why is it necessary to compress files? Mention the digital picture and video compression techniques. 1+2+2=5
11. What is Memory Hierarchy? Explain in detail. Discuss the importance of RAID configuration of disks. 7+3=10
12. What is the OSI reference model? Explain the basic functions of each layer with example of device operating at different layers. Also, discuss how OSI reference model differs from TCP/IP protocol suite. 1+6+3=10
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