West Bengal Institute of Technology (WBIT) 2010-2nd Sem B.C.A Computer Application - 201 Computer Architecture and System Software - Question Paper
Name :
Roll No. : ................................
Invigilators Signature:. _..............
CS/BCA/SEM-2/BCA-201 /2010 2010
COMPUTER ARCHITECTURE AND SYSTEM SOFTWARE
Time Allotted : 3 Hours
. Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to glue their answers In their own words
as far as practicable. '
GROUP-A ( Multiple Choice Type Questions )
iv) 2s complement of 1010100 is
a) 0110011 b) 0101100
c) 1010101 d) 0010010.
v) DMA stands for
a) Data Memory Access
b) Distributed Memory Access
c) Detect Memory Access
d) none of these.
vi) ................. .. is an Implementation technique whereby
multiple instructions are overlapped during an execution.
a) Pipelining b) Hazard
c) Inteirupt d) Strobe.
vii) MAR stands for
a) Memory Address Register
b) Memory Abstract Register
c) Memory Activity Register
d) noneofthese.
viii) The ... ................register is used to store result Of an
instruction.
a) Program counter b) Base register
c) Flag register d) Noneofthese.
ix) The Race condition is appeared in a/clock S-R flip-flop when the values of R & S are
a) 1, 1 b) 1. 0
c) 0,0 d) 0, 1.
' ' -2004 2
x) ..................... is,a memory which transmits data from
main memory to CPU and vice versa.
a) RAM b) Cache
c) Auxiliary d) Virtual.
GROUP -B
(Short Answer Type Questions )
Answer any three of the following. 3x5 =15
2. What do you mean by memory read and write operation ? Describe using register transfer language.
3. Explain direct and indirect addressing with the help of neat sketch.
4. What is virtual memory ?
5. Write down the register transfer language for execution of LDAXB
STAX D
6. Comment oh Direct mapping function of 2048 word Cache memory onto 65,536 word main memory. .
GROUP-C ( Long Answer Type Questions )
Answer any three of the following. 3 x 15 = 45
7. What is virtual memory ? What could be maximum size of virtual memory ? Justify. Briefly describe an instruction execution cycle with proper timing diagram. Explain the Booth's algorithm. Illustrate with example. Briefly discuss
, different types of ROM. Differentiate between Static RAM and Dynamic RAM. 3 +3+ 3 + 3 + 3
8. What are the differences between RISC and CISC processor ? Explain the concepts of sequential processing, pipelining and parallel processing with examples What are the elements of a machine Instruction ? What is meant by
memory access time ? '
4+6+3+2
9- What are 16-bit registers available In 8085 Microprocessor ? Write about them. What ,s bootstrap loader- program stored
In ROM and not in RAM ? What are the elements of machine
instruction? ' ,
2 + 3 + 5 + 5
10. What is interrupt ? What is the difference between primary and secondary storage devices ? What Is stack ? What is flag ? What is the disadvantage of microprocessor ? What is the difference between microprocessor and microcontroller ?
2 + 4 + 2 + 2 + 2 + 3
11. Write short notes on any three of the following: 3x5
a) Vector processing
b) Paging
c) DMA controller
d) Cache memory '
e) 4 in 1 multiplexer. 1
4
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