SRM University 2007 B.Tech Information Technology IT100 -DIGITAL ELECTRONICS - Question Paper

IT100 -DIGITAL ELECTRONICS



UNIT-I
PART-A

1. What is the difference ranging from the digital systems and analog systems?
2. What are the advantages and disadvantages of digital systems?
3. What is meant by switching networks?
4. What are the kinds of switching networks?
5. What is the difference ranging from combinational and sequential switching networks?
6. What are the classifications of design of digital system?
7. Convert .62510 to binary.
8. Convert 231.34 to base7
9. Convert 001101.0101112 to hexadecimal.
10. Write the rules of binary addition.
11. What is BCD code?
12. multiply 11012x10112
13. What is excess-3 code?
14. expand a) ASCII, b) EBCDIC
15. State and discuss demorgan’s legal regulations.
16. What are the basic operations of Boolean algebra?
17. Define truth table.
18. State laws of complementary.
19. State duality principle.
20. Explain about distributive legal regulations.
21. simplify z=A’BC+A’
22. Factor A+B’CD
23. Explain multiplying out and factoring.
24. to obtain the complement of (A’+B)C’
25. Find the dual of function f=ab’+c+0.d’(1+e)
26. Define equivalence operations.
27. What is the difference ranging from exclusive –OR and equivalence operation?
28. What are the universal gates?
29. Write a truth table of OR, AND, &NOT gates.
30. Why excess-3 code is called self complementing code?
31. perform the 9’s complement subtraction 325010-8627510
32. What are the rules of 1’s and 2’s complements methods?
33. Express in sum of product F=AB’+CD’E+AC’E.
34. Find gray code equivalent of the binary code 10112
35. What is an alphanumeric code?
36. Explain about weighted and un weighted codes?
37. Explain r’s and (r-1)’s complement.
38. Draw a network to realize the subsequent function using 2 OR gates and
2 AND gates. F=(V+W+X)(V+X+Y)(V+Z)

39. List down five simplification theorems.
40. How dual of an expression differ from the complement?
41. List 3 laws or theorems which are useful when multiplying out or factoring.


PART-B

1) Convert to octal, binary, and hexadecimal for the subsequent decimal numbers.
a) 757.2510
b) 123410
c) 106310
d) 1305.375110

2) Simplify the Boolean expression

a) [A+B’C+D+EF] [A+B’C+ (D+EF)’]
b) (AB+C) (B’D+C’E’) + (AB+C)’

3) Explain about Boolean rules and laws.

4) add, subtract and multiply in binary
a) 11112 and 10112
b) 10010012 and 1110102
5) perform 2’s and 1’s complement subtraction
i. a) 10101112 - 1011012
b) 1111002 - 1010112
c) 10001002-10101002

6) determine the value of base x ,if :
a) (193)x=(623)8
b) (225)x=(341)8
c) (211)x =(152)8
7) Prove the subsequent theorems algebraically
a) A(A’B)=AB b)(A+B)(A+C)=A+BC
b) B+AB’=A c)(A+B)(A+B’)=A

Earning:   Approval pending.