Roll No. .............
Total No. of Questions
: 07
BCA
(Sem. – 2nd)
DIGITAL
CIRCTITS AND LOGIC DESIGN
SUBJECT
QODE : BC-205
Paper
ID : [80209]
[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
1.
a) What
is binary adder?
b) Draw
the logic diagram for D-flip flop.
c) What
is parity? Explain
d) Define
ASCII? What are its properties?
e) What
are non weighted codes?
f) Draw
circuit diagram of full subtractor.
g) Explain
the difference between SOP and POS.
h) What
is truth table? Explain with example.
i) What
is ring counter? Explain.
j) Explain
the difference between synchronous and asynchronous Sequential circuits.
Section
–B
2. What
is gate? Why NOR gate is called universal gate? Derive OR. AND. XOR from NOR
gate.
3. What
is multiplexer? What are its uses? Draw and explain multiplexer with 16 inputs.
4. What
is race around condition? Explain how Master slave flip solved the race around
condition.
5. What
is shift register? What are its types ? explain various applications of shift
register.
6. Write
notes on the following :
a. Updown
counters
b. T
Flip flop
7.
a. Sate
and prove De Morgan theorm.
b. What
are encoders? Explain.
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