Madras University (UnOM) 2005 B.C.A Computer Application Digital Logic Fundamentals - Question Paper
Monday, 12 August 2013 12:15Web
Digital Logic Fundamentals 2005
PART A - (10 x three = 30 marks)
ans any TEN ques..
All ques. carry equal marks.
1.Convert decimal 0.6875 to binary.
2. Use 2's complement to perform M-N with the provided binary number
M = 1010100 N = 1000100
3.Write a note on "Error-Detection Codes".
4.Prove: x + x = x .
5.Construct the truth table for F = xy' + x ' y .
6. Draw the logic F = x'y'z + x 'y z + xy'circuit for the expression
7. provide the logic diagram and graphic symbol for clocked RS flip-flop.
8.What are the functions of counter?
9.Describe the use of encoders.
10.What are Demultiplexers?
11.What is meant by accumulator?
12.Explain 'Minterms' with an example.
PART B - (5 x six = 30 marks)
ans any 5 ques..
All ques. carry equal marks.
13.Write short notes on "Logic Gates".
14.Simplify the Boolean function using map method F =A'C+A'B+AB'C+BC
15.Explain the operations of status registers.
16. What is a decoder? Draw the logic diagrams of a BCD to decimal decoder and discuss.
17. discuss with a logic diagram, the working of a full-adder.
18. define the operation of accumulator with neat diagram.
19. define about alphanumeric codes and fault codes.
PART C - (4 x 10 = 40 marks)
ans any 4 ques..
All ques. carry equal marks.
20.Perform the subsequent in binary form.
(a) (128)10 - (64)10
(b) (l02) 10 + (120)10
(c) (31) 10 X (14) 10
(d) (25) 10 / (5) 10
21Prove the subsequent equations:
(a) (X+Y)(X+Z)=X+YZ
(b) (A +B'+C)(A +B'+C')(A +B +C) =A +B'C.
22. discuss the shift-right register and shift-left register with circuit diagram and truth tables.
23. Draw the block diagram of a ripple counter. discuss its operation. What is the advantage of a synchronous counter over ripple counter?
24. discuss the action of multiplexer and demultiplexer with suitable diagrams.
25.Describe the operation with function table of ALU.
Earning: Approval pending. |