Computer System Architecture Question Paper of 3rd Semester BCA Download Previous Years Question Paper 9

Roll No.

Total No. of Questions : 07

BCA (Sem.–3rd)

COMPUTER SYSTEM ARCHITECTURE

Subject Code : BC-403

Paper ID : [B0226]

Time : 3 Hrs.      

INSTRUCTION TO CANDIDATES :

1. Section-A is compulsory.

2. Attempt any Four questions form Section-B.

                                                    SECTION-A            

1.                   

a.                 What is a stored program organization?

b.                 Define instruction format.

c.                  Compare micro- operation and macro-operation.

d.                 What is meant by ‘effective address’ of an operand.

e.                  Give example to show how stack is useful in evaluating arithmetic expression.

f.                   Explain Memory Hierarchy with examples.

g.                 What is ‘handshaking’ data transfer?

h.                 Define address space and memory space.

i.                   How CAM is useful in computer system?

j.                   Dedifferentiate between program Counter and Address Register.

Section –B

2.    Explain the following with reference to basic computer organization having 4096 x 16 memory.

a.                 Common bus system with basic registers.

b.                 Timing and control unit

3. What is a memory reference instruction ? explain the following instructions giving their          

    register transfer description:

          a.                 LDA and STA

          b.                 BUN and BSA

          c.                  ADD and ISZ

4.   Explain how bulk transfer of information is made giving block diagram of ‘DMA controller’ 

    and DMA transfer’ in a computer system.

5.                   

a.                 Discuss the  working of a basic memory cell with the help of its logic circuit. Show its           

            application in construction of a 4x3 RAM.

b.                 To upgrade 256x 1 chip to 1024 x 8 memory organization , how many chips are needed?

6.                 Describe the following in 8085 microprocessor giving examples:-

          a.                 Program Status Word (PSW)

          b.                 Instruction Set

          c.                  Addressing modes

          d.                 Bus Structure

7.                 Compare and contrast:

          a.                 Implicit addressing mode and Immediate addressing mode

          b.                 Hardwired control and Micro program control

          c.                  Unified cache and Split cache organization

          d.                 Microprocessor and Multiprocessor