COMA XI UNIT 1

Examination Name: COMA XI UNIT 1
Date: April 11, 2026
Time allowed: 90 minutes

1. 
In binary,1+1+1=?
2. 
What will be the output of an XNOR gate with two inputs A and B?

1) AB
2) Ā.B̄ + AB
3) AB̄ + ĀB
4) A + BDeselect Answer

3. 
The number

(10110)2 will be 1’s complement
A. 00101
B. 10111
C. 01001
D. 01010Deselect Answer

4. 
The positional value of the LSD of the number

(547.26)8 will be

A. 6x82

B. 6x81

C. 6x8-1

D. 6x8-2

Deselect Answer

5. 
Simplifying

F = (A, B = Ā B̄ + A B̄) using K – Map gives the value of F
1) F = B̄
2) F = B
3) F = Ā.B̄
4) ABDeselect Answer

6. 
11001111-what is the hexadecimal value of this number?
7. 
The equivalent binary number of this Grey Code

(11011)2  will beDeselect Answer

8. 
Which of following is not an octal number?
9. 
Which among these is correct?

 (56)8 = (?)10

Deselect Answer

10. 
In K-Map,

the value of the 11th cell of a square of four variables is 1111, whose over all value or decimal value is

Deselect Answer

11. 
The number of rows in the truth table of a Boolean expression with 4 variables is
12. 
Which gate does the equation A + A'B refer to?
13. 
The octal form of the number

(101.11)2 will beDeselect Answer

14. 
Which of the following codes can also be called Self Complementary Method?
15. 
Which is correct?

Assertion: The rightmost bit of a binary number is called MSB
Reason: The rightmost digit has the lowest valueDeselect Answer

16. 
The minimum number of variables in this logic expression

F = Σ (0,2,5) isDeselect Answer

17. 
The sum of 4 bits is
18. 
The value of D in hexadecimal number system is
19. 
Which is correct in

____
X + Y̅ = ? 
A. x̄.y 
B. x.ȳ 
C. x̄ + ȳ 
D. X̄.ȲDeselect Answer

20. 
What is the octal value of the decimal number
21. 
The positional value of 5 in the number 537 is
22. 
Which is correct?

f(A, B) = ∏(1, 2)=
A. (Ā + B̄) (A + B)
B. (A + B̄) (Ā + B)
C. (A + B̄) (Ā + B̄)
D. A + B̄ + BDeselect Answer

23. 
Find the correct answer

 The values of 20,80, 160 are

Deselect Answer

24. 
Which of the following is not a basic gate?
25. 
A code prescribed for displaying the Indian alphabet is
26. 
The value of x here

(24)8 + (x)10 = (32)10 will beDeselect Answer

27. 
The MSB and LSB of the number

 (101101010)2 are respectively

Deselect Answer

28. 
The equivalent decimal number of the number

(1011.11)2  will beDeselect Answer

29. 
How many gates are required to make a logic circuit for

f = x + ȳ z ?
A. 1
B. 2
C. 3
D. 4Deselect Answer

30. 
The code used to express symbols in all languages worldwide is
31. 
The current number of bits in ASCII code is
32. 
The 2’s complement of

(1011)2 isDeselect Answer

33. 
The BCD value of the number

(42)10 will beDeselect Answer

34. 
Which is correct?

Assertion: 512,64,8,2 This is a positional value in a number system
Reason: Numbers are converted from binary to decimal number system using positional valueDeselect Answer

35. 
(X + Y)(X + Z) =
36. 
The XNOR is composed of the following gates:

i) AND
ii) OR
iii) NOT
Which of the following is correct?Deselect Answer

37. 
Which is correct here?

X + X̄Y = 
A. X
B. Y
C. X+Y 
D. X̄+YDeselect Answer

38. 
The highest number in the octal system _________ _ is and the lowest number is __________
39. 
In Boolean, minterms are combined by variables__________
40. 
This will be the Grey Code of the binary number

(11011)2Deselect Answer

41. 
According to the Involution or Double Complement formula in Boolean algebra

1) Ā = Ā
2) Ā = A.A
3) Ā = Ā
4) None of theseDeselect Answer

42. 
Which is correct?

Assertion: The base of the hexadecimal number system is 16
Reason: The hexadecimal number system has 16 digits from 0 to FDeselect Answer

43. 
The hexadecimal form of the number

(245)10 will beDeselect Answer

44. 
What is the BCD value of the decimal number 473?
45. 
How many NOR gates are needed to make an OR gate from a NOR gate?
46. 
Using K-Map,

F(A,B,C) =Σ(m0 , m4) = Ā B̄ C̄ + A B̄ C̄ is simplified to give the value of F
1) B̄ C
2) B̄ C̄
3) B C̄
4) BDeselect Answer

47. 
Which two of the following are Universal gates?
48. 
The output of AND gate is High (1) when
49. 
In Boolean x (x+y) =
50. 
The positional value of 5 in the number

(257) 8 is

Deselect Answer

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