## Download Question Paper of "Digital Electronics Fundamentals 2 BSC(IT)" , Question Paper of BSC(IT) 2nd Semester, Subject Code : BS-102, Paper ID B0405, Paper 5

• Tuesday, June 28, 2016

Roll  No...................
Total  No.  of  Questions  :  07

B.Sc.(IT)  (Sem.–2nd)
DIGITAL   ELECTRONICS   FUNDAMENTALS
Subject  Code  :  BS-102
Paper  ID  :  [B0405]
Time  :  3  Hrs.
INSTRUCTION  TO  CANDIDATES  :
1) Section - A is Compulsory.
2) Attempt any Four questions from Section–B.

Section –A

1.     Explain the following :
a.     Realize an AND gate using NOR gates only.
b.     Differentiate between ROM and RAM .
c.      What do you mean by an error?
d.     What is the function of T flip flop ?
e.      Distinguish between positive and negative logic.
f.       How is racing condition avoided?
g.     Differentiate between synchronous and asynchronous counter.
h.     Convert Y=A’C+ A’+BC into canonical SOP form .
i.       Convert (5489.2) 10 into octal number.
j.       Give the truth table and logic diagram for half adder

Section –B

2.     Design a 3x8 decoder.

3.     Minimise the following Boolean expression using K-MAP:

F(a,b,c,d)=∑m(2,3,6,8,9,10,12,15)+d(0.7)

Realize the circuit using NAND gates

4.     Compare various error correction and detection methods

5.     Design a modulo-10 synchronous  methods

6.     Draw the truth table of full subtractor . Realise the full subtractor circuit using NAND gates only.

7.     What do you mean by multiplexer? Realise the following expression using  4:1 ,multiplexer: Y=m(1,3,4,7,8,11,13)