EC201 Pages: 2

Reg. No. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SECOND SEMESTER MCA DEGREE EXAMINATION, APRIL 2018

Course Code: RLMCA112
Course Name: COMPUTER ORGANIZATION AND ARCHITECTURE

Max Marks: 60 Duration: 3 Hours

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PARTA
Answer all questions. Each question carries 3 marks.

What is System Software? Write any two examples of System software.

Distinguish between memory mapped I/O and I/O mapped I/O.

Explain multiple bus organization with a neat diagram.

Write the sequence of control steps required for the instruction: ADD R1, R2,R3 ina
three bus architecture.

Discuss any two methods for handling interrupts from multiple devices.

Differentiate between SRAM and DRAM cells.

Construct a 4M X 16 memory module using 256K X 4 memory chips.

What is Cache hit and Cache miss? Discuss Cache Coherence problem.

PART 8
Answer any one question from each module. Each question carries 6 marks.
MODULE I

a. What is a system bus? Discuss various bus structures. (3)
b. Discuss any two bus arbitration methods. (3) OR

What are Branch Instructions? Discuss the execution sequence of Branching
instructions (Jump and Conditional Branching) with the help of examples.

MODULE II

Explain how data transfer takes place between processor and I/O device in Program
Controlled I/O technique with an example.

OR

Discuss subroutine linkage method. And explain how nested subroutines are
implemented.

MODULE III

Discuss the organization of hardwired Control Unit.
OR

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