Punjab Technical University 2006-3rd Sem B.Sc Information Technology -ITCOMPUTER SYSTEM ARCHITECTURE - Question Paper

COMPUTER SYSTEM ARCHITECTURE
BSCIT third Semester (2096)

Time: 3 Hours Max Marks:75

Note: The ques. paper consists of 2 parts A and B
7) Attempt all ques. from Part A
8) Attempt any 9 ques. from Part B.


Part A
1.
i. Explain the working of a program counter.
ii. What is ENIAC?
iii. What is word size in computer system?
iv. Define the term flip-flop?
v. What are software interrupts?
vi. What is a pseudo- instruction?
vii. Describe any 2 disadvantages of assembly language program.
viii. What are horizontal microinstructions?
ix. Subtract (45)10 from (95)10 using 2’s compliment.
x. What is BCD adder?
xi. What are non-vectored interrupts?
xii. What is the concept of virtual memory?
xiii. How do we write data into a cache memory? discuss.
xiv. What is associated memory?
xv. What is auxiliary memory?

(15x2=30)

Part B
2. Discuss briefly the different generations of evolution of computers.
3. Explain the difference ranging from a direct and an indirect address instruction.
4. How fetch cycle and execute cycle works? discuss.
5. Explain the difference ranging from memory reference instructions and register – reference instructions.
6. How do we convert an infix expression to postfix expression? discuss with the help of suitable example.
7. What are the rules for writing an assembly language program?
8. Explain the difference ranging from Interperative , Declarative and Directive statements.
9. What are various modes of data transfer? discuss direct memory access with the help of suitable diagram.
10. Explain the working of any 2 input devices.
11. What is paging? discuss with the help of suitable example.
12. Explain the access rights of interest that are used for protecting the programs residing in memory.
13. Explain the concept of page replacement and page fault.

` (9x5=45)

Earning:   Approval pending.