1 $What is the binary equivalent of the decimal number $25$?$

A.

B.

C.

D.

2 $Convert the binary number to its hexadecimal equivalent.$

A.

B.

C.

D.

3 $What is the decimal value of the octal number ?$

A.

30

B.

26

C.

28

D.

32

4 $Which of the following is a weighted code?$

A.

Excess-3 Code

B.

Gray Code

C.

BCD (8421) Code

D.

ASCII

5 $Convert the Binary number $1011$ to Gray code.$

A.

1110

B.

1011

C.

1101

D.

1001

6 $The Excess-3 code for the decimal number 6 is:$

A.

0110

B.

1001

C.

1010

D.

1100

7 $Which logic gate is known as the 'Universal Gate'?$

A.

AND

B.

OR

C.

NAND

D.

XOR

8 $The 2's complement of the binary number $10110$ is:$

A.

01001

B.

01010

C.

00110

D.

10111

9 $Perform the subtraction using 2's complement.$

A.

B.

C.

D.

10 $According to De Morgan's first theorem, is equal to:$

A.

B.

C.

D.

11 $The boolean expression simplifies to:$

A.

B.

C.

D.

$1$

12 $Which gate produces a HIGH output only if the two inputs are different?$

A.

XNOR

B.

AND

C.

XOR

D.

NOR

13 $How many cells are there in a 4-variable K-Map?$

A.

8

B.

12

C.

16

D.

32

14 $The output of an OR gate is LOW only when:$

A.

All inputs are HIGH

B.

Any input is HIGH

C.

All inputs are LOW

D.

Input is alternating

15 $Convert the decimal fraction $0.625$ to binary.$

A.

$0.101$

B.

$0.110$

C.

$0.111$

D.

$0.011$

16 $In a K-Map, grouping 4 adjacent $1$s (a quad) eliminates how many variables?$

A.

1 variable

B.

2 variables

C.

3 variables

D.

0 variables

17 $What is the BCD (8421) equivalent of the decimal number 15?$

A.

1111

B.

0001 0101

C.

1110

D.

0001 0110

18 $The logic expression for 3 variables represents which logic?$

A.

B.

C.

D.

19 $What is the 1's complement of the binary number $1101$?$

A.

0010

B.

0011

C.

1100

D.

1110

20 $Which of the following represents the commutative law of addition?$

A.

B.

C.

D.

21 $Gray code is also known as:$

A.

Reflected code

B.

Weighted code

C.

Sequential code

D.

Alphanumeric code

22 $The dual of the boolean function is:$

A.

B.

C.

D.

23 $A minterm corresponding to input combination is:$

A.

B.

C.

D.

24 $The hexadecimal number is equivalent to which octal number?$

A.

345

B.

275

C.

335

D.

325

25 $The boolean expression is equivalent to:$

A.

B.

C.

D.

26 $Which code is used to prevent errors during state transitions because only one bit changes at a time?$

A.

BCD

B.

Excess-3

C.

Gray Code

D.

ASCII

27 $What is the minimum number of 2-input NAND gates required to implement a 2-input AND gate?$

A.

1

B.

2

C.

3

D.

4

28 $The range of signed decimal numbers that can be represented by 5-bit 2's complement arithmetic is:$

A.

to

B.

to

C.

to

D.

to

29 $In Boolean Algebra, is equal to:$

A.

$1$

B.

C.

$0$

D.

30 $Convert the Gray Code $1011$ to Binary.$

A.

1101

B.

1001

C.

1110

D.

1010

31 $The POS (Product of Sums) form represents the expression as a:$

A.

Sum of minterms

B.

Product of maxterms

C.

Product of minterms

D.

Sum of maxterms

32 $Simplify the boolean expression using K-map if adjacent cells are all 1.$

A.

B.

C.

$1$

D.

$0$

33 $Which of the following is a self-complementing code?$

A.

BCD Code

B.

Excess-3 Code

C.

8421 Code

D.

Gray Code

34 $Perform binary addition: .$

A.

110000

B.

100100

C.

110100

D.

101110

35 $The XNOR gate is equivalent to:$

A.

B.

C.

D.

36 $What is the radix of the Hexadecimal number system?$

A.

2

B.

8

C.

10

D.

16

37 $In a 3-variable K-Map, the cell represented by binary $101$ corresponds to which decimal minterm?$

A.

3

B.

5

C.

6

D.

7

38 $Using boolean algebra, simplified form of is:$

A.

B.

C.

D.

39 $The symbol in Logic design indicates:$

A.

Sum of Products

B.

Product of Sums

C.

Division

D.

XOR operation

40 $Which law states ?$

A.

Associative Law

B.

Commutative Law

C.

Distributive Law

D.

Absorption Law

41 $Calculate using 4-bit 2's complement arithmetic. .$

A.

0111

B.

1001

C.

0011

D.

0110

42 $What logic function is represented by ?$

A.

B.

C.

D.

43 $The maxterm designated as for 3 variables represents:$

A.

B.

C.

D.

44 $The term 'Don't Care' in K-Maps is represented by:$

A.

0

B.

1

C.

X

D.

Z

45 $In positive logic convention, logic '1' represents:$

A.

Lower voltage level

B.

Higher voltage level

C.

Zero voltage

D.

Negative voltage

46 $Which of the following expressions is in Canonical SOP form?$

A.

B.

C.

D.

47 $If, find the base .$

A.

7

B.

8

C.

9

D.

6

48 $Idempotent Law in boolean algebra states:$

A.

B.

C.

D.

49 $The complement of the expression is:$

A.

B.

C.

D.

50 $What is the result of binary multiplication ?$

A.

1111

B.

1001

C.

11011

D.

10101

Unit 3 - Practice Quiz