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PROGRAM BSc IT
SEMESTER SECOND
BT0068, Computer Organization and Architecture
1 1. Subtract (76425-28321) using 10’s complement. Show the steps. 2. Subtract (28531-345620) using 10’s complement. Show the steps.
2What do you mean by bus in computer system? Explain the bus structure.
3Explain the instruction format with diagram and examples.
4Explain the non-negative integers and negative integers representation.
5Explain the mapping functions between the main memory and CPU.
6Write a short note on DMA controller. Draw the diagram of it.
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SUBJECT CODE & NAME BT0070, Operating Systems
1 Describe the mechanism of process creation in an OS. 10 10
2 Suppose that the following processes arrive for execution at the
times indicated.
Process Burst Time
P1 24
P2 3
P3 3
- Suppose the process arrives in the order P1, P2, P3 and
- Suppose the process arrive in the order P2, P3, P1.
For both the above situation draw the Grantt Chart and calculate
the waiting time for each process and average waiting time.
3 Write short notes on:
- Critical section problem
- Buffering
4 What are TLBs? Why they are required in paging? 3+7 10
5 Describe the techniques of free space management of free space
list.
6 What are computer viruses? How do they affect our system?
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SUBJECT CODE & NAME
BT0072, COMPUTER NETWORKS
1 What is Message switching and Packet switching? 5+5 10
2 What is Framing? Briefly explain Fixed-Size Framing, Variable Size Framing,
3 What is Stop-and-Wait Automatic Repeat Request? Briefly explain.
4 What is the role of Internet Protocol version 4 (IPV4) in addressing and routing packets between hosts? Briefly explain the structure of an IPV4 packet.
5 How SMTP works? Briefly explain applications of SMTP. 10 10
6 What is SSL protocol? How SSL handles a message?
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