## Download Question Paper of "Digital Circuits and Logic Designs 2" , Question Paper of BCA 2nd Semester, Subject Code : BSBC - 205, Paper ID 802091, Paper 5

• Monday, May 30, 2016

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.
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.