Osmania University (OU) 2010 B.Sc Computer Science Electronics 3-First Term - Question Paper

SHADAN DEGREE COLLEGE FOR BOYS
(Affiliated to Osmania University)
FIRST TERM EXAMINATION-2010

Time: three Hours Electronics paper three Max. Marks: 100

ans any 4 of the subsequent ques.

1.a) describe NAND and NOR Gates with the help of the logic symbols and truth tables, and discuss why are they called universal building blocks. [20M]
OR
b) What is a Memory? discuss the classification of semiconductors memories. [20M]

2.a) discuss the Laws of Boolean Algebra. [10M]
b) State and prove De'Morgan's Theorems with the help of logic gates. [10M]
OR
c) discuss SOP. What is Karnaugh Map? discuss in detail how it helps in simplifying a provided Boolean expression. [20M]

3. a) discuss Half and Full Adders n detail with the help of diagrams and truth tables. [20M]
OR
b) discuss the Multiplexer and De-multiplexer in detail with the help of diagrams. [20M]

4. a) What is a Flip Flop? discuss in detail the RS Flip Flop with the help of truth table. [20M]
OR
b) discuss the Race issue in flip flops. with the help of block diagrams and discuss how this issue can be avoided. [20M]

ans any 4 of the subsequent ques.. (4*5=20M)

1. discuss NOT gates using transistor.

2. Write short notes on XOR gate.

3. decrease the subsequent Boolean expressions.
i) A[B+C(AB+AC)
ii) A+AB

4. Convert the subsequent hexadecimal into octal
i) 7F.9E ii) F809 iii) IBA5.6D

5. Draw the logic diagrams for the Boolean expressions provided beneath
i) A.B+A.B ii) (A+B).(A.B)

6. Write short notes on Shift Registers.

7. Write short notes on Parallel adder.

Earning:   Approval pending.