Punjab Technical University 2006-3rd Sem M.C.A -COMPUTER SYSTENM ARCHITECTURE - Question Paper

COMPUTER SYSTENM ARCHITECTURE
MCA-304, third Semester (2096)

Time: 3 Hours Max Marks:75

Note: Candidates are needed to attempt any 9 ques. from part B & part A will be compulsory.

Section – A
Q1
a. Convert the subsequent logic function into minterm
A’B’C’D+A’BCD+ABCD’+AB’CD’
b. Define the terms microprogramming & multiprogramming.
c. Give the layered view of a computer system.
d. What is the role of Decoder in digital computers?
e. Perform the subtraction with the subsequent unsigned binary number by taking the 2’s compliment of the subtrahend
11010-10000
f. Explain the meaning of the menmory-reference ubstryctuib
AND to AC
g. What is the difference ranging from hardwired control and micro programmed
control?
h. Give 2 examples of Data transfer instructions.
i. How Cache Memory is useful in memory hierarchy?
j. What do you mean by isolated I/O?
k. How the Risc Architecture is various from Cisc Architecture.
l. Explain the Characteristics table of SR flip-flop.
m. What is the role of memory stack in CPU?
n. Why we need virtual memory?
o. What do you mean by Interrupt-Initiated I/O?
Marks : (2x15)

Section –B
Q2. A computer employs RAM chips of 256x8 and ROM chips of 1024x8. The computer system needs 2K bytes of RAM, 4K bytes of ROM, and 4 interface units, every with 4 registers. A memory-mapped I/O configuration is used. The two highest-order bits of the address bus are assigned 00 for RAM, 01 for ROM, and 10 for interface registers. How many RAM and ROM chips are needed?
Q3. Explain the Relative addressing mode using suitable example?
Q4. How many characters per 2nd can be transmittesd over a 1200-baud line in each of the subsequent modes considering a character code of eight bits.
Synchronous serial transmission
Asynchronous serial transmission with one stop bit
Q5. Explain in detail the working of Set-Associative Mapping with the help of a suitable example.
Q6. What is the difference ranging from a direct and indirect instruction? How many references to memory are needed for every kind of instruction to bring an operand into a processor register?
Q7. Convert the subsequent arithmetic expressions from Reverse Polish Notation to infix notation.
a. A B C D E +*-/ (2)
b. A B C*/D-EF/+ (3)
Q8. Explain the design and working of a Octal-to-Binary Encoder.
Q9. Write a short note on 4-bit synchronous binary counter.
Q10. Explain in detail about Program Control Instructions.
Q11. Discuss the important characteristics of Risc Processor.
Q12. Draw a comparison ranging from Micro programmed and Hardwired control unit.
Q13. Write a detailed note on Priority Interrupts.
(5X9)

Earning:   Approval pending.