## CS203 SWITHING THEORY AND LOGIC DESIGN MODAL QUESTIONS FOR SECOND YEAR S3

**SWITHING THEORY AND LOGIC DESIGN**

**QUESTION PAPERS**

__PART A__

__(Answer All Questions, 5 x 2 = 10 Marks)__
1. What is distributive law?

2. Prove the theorem A+AB=A.

3. What is essential prime cube?

4. Simplify the expression: xyz + x’y + xyz’

5. Simplify the function F=Σ(1,3,5,7,8) using K-map.

**PART B**

**(Answer Any Two Questions, 2 x 5 = 10 Marks)**
6. State and prove DeMorgan’s law?

7. Simplify the function F=Σ(0,1,3,5,6,7,10,14,15) + Σd(8,12)

8. Find the complement and simplify to minimum number of literals

a) (BC’ + A’D) ( AB’ + CD’)

b) B’D + A’BC + ACD + A’BC

c) [(AB)’A] [ (AB)’ B]

d) AB’ + C’D’

9. Simplify the function F= Σ(0,1,2,5,6,7,8,9,10,14) using Quine Mc Clusky tabular method.

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