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Previous Year Question Paper

AL/CSIT (CI)/CS/CT/CO/IO/IS-404 (GS) – Computer Organization & Architecture

June 2025CSITSEMESTER-4
June 2025
Max Marks: 70
Duration: 3 Hours
Instructions:

Attempt any five questions.

All questions carry equal marks.

Q.1
a)Unit 2

Discuss the structure and role of program counter, instruction register and memory register during a fetch-execute cycle.

b)Unit 1

How does the control word help in micro-operation execution? Illustrate with an example.

Q.2
a)Unit 1

Illustrate the concept of bus structure. How does it aid in CPU and memory communication?

b)Unit 3

Explain 1's and 2's complement representation for negative numbers with examples.

Q.3
a)Unit 3

Describe Booth's algorithm for multiplication. Illustrate with a 4-bit example.

b)Unit 3

Compare fixed point and floating point arithmetic operations with examples.

Q.4
a)Unit 4

How does USB differ from SCSI bus in terms of speed, cost and application?

b)Unit 4

Write a comparative note on different types of I/O interfaces.

Q.5
a)Unit 4

Explain the working of PCI bus. How does it improve I/O performance?

b)Unit 5

Differentiate magnetic tape, disk and optical storage based on access time, reliability and cost.

Q.6
a)Unit 5

How does cache memory improve system performance? Explain cache design.

b)Unit 5

Write a program in Pseudo code to simulate page replacement using LRU.

Q.7
a)Unit 5

Describe the structure and working of inter-processor communication and synchronization.

b)Unit 5

Compare RISC and CISC architectures with examples.

Q.8
Unit 4/5

Write short notes on any two: a) Direct Memory Access b) Virtual Memory c) Read Only Memory.