Monday, May 30, 2016
Roll No. .............
Total No. of Questions : 07
BCA (Sem. – 2nd)
DIGITAL CIRCUITS AND LOGIC DESIGN
SUBJECT QODE : BC-205 (S05)
Paper ID : [A0210]
[Note : Please fill subject code and paper ID on OMR]
Time : 03 Hours
Instruction to Candidates:
1) Section - A is Compulsory.
2) Attempt any Four questions from Section - B.
Section – A
a. Convert 40 from decimal to octal number.
b. Convert DF from hex to decimal number.
c. What are Minterms and Maxterms?
d. What is a combinational circuit?
e. What is a half-adder?
f. What is a flip-flop?
g. What is an asynchronous input?
h. What is a shift register?
i. Subtract 101 from 1011 using 2’s complement.
j. Subtract 101 from 1111 using 1’s complement.
k. What is and error correcting code?
l. What is and encoder?
m. What are universal gate?
n. What is T flip-flop?
o. What is positive logic?
2) Enumerate the features of Hamming code.
3) Explain SOP and POS functions with examples.
4) Using De-Morgan’s Laws convert the NAND function Y=(AB)’into NOR function.
5) Explain the essential features of the Karnaugh map. What are their advantages and disadvantages?
6) Discuss the features of the Quine Mccluskey method.
7) What is a multiplexer? Construct a 64-to-1 multiplexer 4*1MUX.
8) Draw an S-R flip-flop using NOR gates and develop its truth table.
9) Compare between synchronous and asynchronous counters.
10) What is the race around problem, and how is it rectified?
11) Discuss the various types of shift registers and their applications.
12) Discuss the Master Slave J-K flip flop with the help of suitable block diagram.
13) What is an updown counter? Design and updown counter which counts from 0 to 9.
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