MGKVP BCA 2019 DECO

Mahatma Gandhi Kashi Vidyapeeth
BCA(2nd semester)
Digital Electronics & Comp Org 
2019
MM:75                                                Time:3 hrs
Attempt any five questions---
All questions carry equal marks (15 marks of each)---


Q 1- Explain the following terms:       5*3=15
      
       (a) De Morgan's' Law
       (b) ROM & RAM
       (c) Counters

Q 2- (a) What are the basic gates? How other gates may be constructed by using the basic gates ? Explain.
                                                                7.5*2=15
        (b) With suitable diagram, explain JK & RS flip flops.

Q 3- (a) Design 5 Mod Counters using JK flip flop & implement them.
                                                                7.5*2=15
         (b) Solve the following boolean function using K- Map. Implement the simplified function using logic gates.
                  
F(w,x,y,z) = Summation(0,1,4,5,6,8,9,10,12,13,14)

Q 4- (a) With a neat block diagram explain the function of encoder. Explain periority encoder also ?
                                                                7.5*2=15
         (b) Explain serial transfer with respect to shift register with suitable example.

Q 5- (a) Differentiate between Asynchronous & Synchronous circuits. What are the problems related to Asynchronous circuits?
                                                                7.5*2=15
         (b) Explain Cache memory?

Q 6- (a) Differentiate between floppy disk & hard disk.                                             5+5+5=15
         (b) Differentiate between SOP & POS, minterm and maxterm.
        (c) Differentiate between Multiplexer & Decoder.

Q 7- (a) What is meant by the race around condition? How can it be solved? Explain.
                                                                7.5*2=15
        (b) Draw circuit diagram with the truth table for full adder.

Q 8- Write short notes on any three of the following :                                                5*3=15
 
        (i) EPROM
        (ii) State table
        (iii) Master - Slave Flip Flop
        (iv) Implement F(a,b,c) =              
                                                   Summation(0,6) using NAND & NOR gate.                      
                                                                      
                            **************

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