⋅⇁ − ಲ Name:
APS ABDUL ೭1೩1 ೩೫೫೬1 ರ್ಟ UNIVERSITY

First Semester MCA (2 Years) Degree Examination December 2020

Reg ಜಂ. __

Course Code: 20MCA103
Course Name: DIGITAL FUNDAMENTALS & COMPUTER ARCHITECTURE

Max. Marks: 60 Duration: 3 Hours
PART A
Answer all questions, each carries 3 marks. Marks
1 Represent -45 in sign magnitude, 1’s complement and 2’s complement form. (3)
2 Implement a Full adder by deriving expressions from its truth table. (3)
3 Implement a JK flip flop and explain its working. (3)
4 Construct a Mod-5 Asynchronous Counter. (3)
5 Suppose we have two implementations of the same instruction set architecture. (3)

Computer A has a clock cycle time of 250 ps and a CPI of 2.0 for some
program, and computer B has a clock cycle time of 500 ps and a CPI of 1.2 for

the same program. Which computer is faster for this program and by how

much?
6 Briefly describe the 5 key components of a Computer System. (3)
7 What are the MIPS Datapath components required to construct a Branch (beq) (3)
Datapath? Represent their symbols and the control signals associated with them.
8 Briefly explain the different types of Pipeline hazards. (3)
Define Temporal locality and Spatial locality. (3)
10 What is a Semi-conductor Memory? (3)
PART B
Answer any one question from each module. Each question carries 6 marks.
Module I

1] Minimize the Boolean expression f(A,B,C,D)=Zm(1,5,6,7,9,15)+d(2,3,11,13) (6)
using Karnaugh map and realize it using Logic gates.

OR
12 Convert the decimal number 3.257 * 10۸4 into 188-754 Single Precision (6)

Floating Point binary representation.

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