Punjab Technical University 2008 B.C.A Computer Application Computer system architecture - Question Paper
[Total No. of Pages : 02
Roll No.......................
Total No. of Questions : 13]
(Please fill this Paper ID in OMR Sheet)
BCA (403) (S05) (O) (Sem. - 4th) COMPUTER SYSTEM ARCHITECTURE
Maximum Marks : 75
Time : 03 Hours
Instruction to Candidates:
1) Section - A is Compulsory.
2) Attempt any Nine questions from Section - B.
Section - A
Q1
a) What are stack pointers?
b) Define OP codes.
c) What is zero address instruction?
d) What are I/O ports?
e) What is the function of associative memory? What is another name of it?
f) Write a note on computer registers.
g) Briefly explain the stack limits.
h) What are the three major phases through which the control unit go through an instruction cycle?
i) Define cache memory.
j) What is Asynchronous data transfer?
k) Differentiate between isolated I/O and memory mapped I/O?
l) Define memory hierarchy.
m) What is the function of accumulator in 8 bit microprocessor.
n) Differentiate between Interpreter and Compiler.
o) What do you understand by Interleaved DMA?
(9*5 = 45)
Q2) Write a step wise procedure to write information in Computers memory.
Q3) Discuss the various phases of instruction cycle.
Q4) Explain the control unit architecture.
Q5) List the control functions and micro operations needed for the execution of memory reference instructions.
Q6) Draw a block diagram for data transfer from CPU to an interface and then to an I/O device. Determine the procedure for setting and clearing the flag bit.
QUA What is the difference between a direct and indirect address instruction? How many references to memory are needed for each type of instruction to bring an operand into a processor register?
Q8) (a) Differentiate between RISC and CISC.
(b) What is the difference between hardwired control and micro programmed controls?
Q9) Discuss the various modes of data transfer.
Q10)Draw and explain address and data bus structure of 8 bit microprocessor.
Q11)Determine the methods to handle branches in a pipeline instruction execution unit.
Q12)Write an algorithm for multiplication of two unsigned numbers using shift and add method.
Q13)Write short notes on the following:
(a) Array Processor
(b) Memory Management Techniques.
D-490 2
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