Wednesday, August 31, 2016
Roll
No.
Total
No. of Questions : 07
B.Sc. (IT) (Sem.–3rd)
COMPUTER SYSTEM ARCHITECTURE
Subject Code : BS-201
Paper ID : [B0409]
Time
: 3 Hrs.
INSTRUCTION
TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of
TEN questions carrying
TWO marks each.
2. SECTION-B contains SIX questions
carrying TEN marks each and student has to attempt any FOUR questions
Section –A
l.
Write briefly :
(a) Who controls the buses during the DMA?
(b) What was Herman Hollerith’s
contribution towards the design of
computers?
(c) How the Fetch cycle works?
(d) What is the purpose of Program counter?
(e) What are the factors affecting the
instruction length?
(f) Name various registers in a computer
system.
(g) How multi-programs are handled by the
computer system?
(h) What are the shift operations? How are
they important?
(i) What are the ways to write data to the
cache memory?
(j) What is the reason for having
hierarchical memory organization?
SECTION-B
2.
What is an addressing mode? Explain various addressing modes in detail.
3.
Compare the five generation of computers on the basis of technology,
speed, cost, size and languages.
4.
What is an interrupt? What is its purpose? What are the types of
interrupts supported by a computer system?
5.
Distinguish between paging and segmentation.
6.
Write a program loop using a pointer and a counter, that clears to zero
the contents of the hexadecimal locations
500 to 5FF.
7. A computer
uses memory unit of 256K words of 32-bit each. Binaryinstruction code is stored
in one word of memory. The instruction has four parts an I bit, an operation
code, a register codes part to specify one of the 64 registers and an address
part:
(a) How many
bits are there in the operation code, the register code part and the address
part?
(b) Draw the
instruction word format and indicate the number of bits in
each part.
(c) How many
bits are there in data and address inputs of memory?
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