Free Printable BEDLC_UNIT 2

1.

Number of cells in the 4 - variable K-MAP

a)

4

b)

16

c)

12

d)

8

2.

K-MAP is used for..........

a)

Boolean functions minimizations

b)

Boolean functions maximization

c)

Boolean functions minimization without using boolean laws

d)

None

3.

$f\left(A,B,C\right)\ =\ \Sigma m\left(0,2,3,4,5,6\right)$

a)

A'B+AB'

b)

A'B+AB'+C

c)

AB+A'B'+C

d)

A'B+AB'+C'

4.

$F\ \left(A,B,C,D\right)\ =\ \Sigma m\left(0,1,2,3,5,7,8,9,10,12,13\right)$

a)

F = B'D'+AC'+A'D

b)

F = BD'+AC+A'D

c)

F = B'D'+AC'+A'D'

d)

F = B'D'+A'C'+A'D

5.

Boolean expression

(X+Y)(X+Y') + ((XY')+X')' simplifies to

a)

X

b)

Y

c)

XY

d)

X + Y

6.

The output F found to be logic 1 when A = 0, The values of B and C are

a)

B = 1, C = 0

b)

B = 0, C = 0 or 1

c)

B = 1, C = 1

d)

indeterminate

7.

The number of terms in a switching function of four variables are

a)

8

b)

12

c)

16

d)

32

8.

There are .............cells in a 3 variable K map

a)

2

b)

5

c)

9

d)

8

9.

The logical expression A+A'B is equivalent to

a)

AB

b)

A'B

c)

A'+ B

d)

A+B

10.

Across - A - 0,1

Down - B - 0,1

Which expression represents the Karnaugh Map? (0s removed for simplicity)

a)

A'B'

b)

AB'

c)

A'B

d)

AB

11.

Across - AB - 00,01,10,11

Down - C - 0,1

Which expression represents the Karnaugh Map? (0s removed for simplicity)

a)

A'B'C+ABC

b)

AB'C'+ABC

c)

A'BC'+A'BC

d)

ABC+A'B'C'

12.

What does a Karnaugh Map do to Boolean Expressions?

a)

Simplify

b)

Process

c)

Translate

d)

Complicate

13.

Each individual term in standard POS form is called _____

a)

Minterm

b)

Maxterm

c)

Constant

d)

Variable

14.

The expression Y=(A+B)(B+C)(C+A) shows the _________ operation.

a)

AND

b)

POS

c)

SOP

d)

NAND

15.

The number of terms in a switching function of four variables are

a)

8

b)

12

c)

16

d)

32

16.

There are .............cells in a 3 variable K map

a)

2

b)

5

c)

9

d)

8

17.

The logical expression A+A'B is equivalent to

a)

AB

b)

A'B

c)

A'+ B

d)

A+B

18.

Number of cells in the 4 - variable K-MAP

a)

4

b)

16

c)

12

d)

8

19.

K-MAP is used for..........

a)

Boolean functions minimizations

b)

Boolean functions maximization

c)

Boolean functions minimization without using boolean laws

d)

None

20.

$f\left(A,B,C\right)\ =\ \Sigma m\left(0,2,3,4,5,6\right)$

a)

A'B+AB'

b)

A'B+AB'+C

c)

AB+A'B'+C

d)

A'B+AB'+C'

21.

$F\ \left(A,B,C,D\right)\ =\ \Sigma m\left(0,1,2,3,5,7,8,9,10,12,13\right)$

a)

F = B'D'+AC'+A'D

b)

F = BD'+AC+A'D

c)

F = B'D'+AC'+A'D'

d)

F = B'D'+A'C'+A'D

22.

Across - A - 0,1

Down - B - 0,1

Which expression represents the Karnaugh Map? (0s removed for simplicity)

a)

A'B'

b)

AB'

c)

A'B

d)

AB

23.

Across - AB - 00,01,10,11

Down - C - 0,1

Which expression represents the Karnaugh Map? (0s removed for simplicity)

a)

A'B'C+ABC

b)

AB'C'+ABC

c)

A'BC'+A'BC

d)

ABC+A'B'C'

24.

Across - AB - 00,01,10,11

Down - C - 0,1

Which expression represents the Karnaugh Map? (0s removed for simplicity)

a)

A'B'C+AB'C

b)

AB'C'+ABC

c)

ABC+ABC'

d)

ABC+A'B'C'

25.

What does a Karnaugh Map do to Boolean Expressions?

a)

Simplify

b)

Process

c)

Translate

d)

Complicate

26.

When ordering binary numbers for a Karnaugh Map, which of the following is the correct sequence?

a)

00, 01, 11, 10

b)

00, 11, 10, 01

c)

11, 10, 01, 00

d)

00, 01, 10, 11

27.

Write out the Boolean expression for this Karnaugh Map

a)

A^¬B

b)

A^B

c)

¬A^¬B

d)

¬A^B

28.

Each individual term in standard POS form is called _____

a)

Minterm

b)

Maxterm

c)

Constant

d)

Variable

29.

The expression Y=(A+B)(B+C)(C+A) shows the _________ operation.

a)

AND

b)

POS

c)

SOP

d)

NAND

30.

Canonical form is a unique way of representing ____________

a)

SOP

b)

Minterm

c)

Boolean Expressions

d)

POS

31.

The expression Y=AB+BC+AC shows the _________ operation.

a)

EX-OR

b)

SOP

c)

POS

d)

NOR

32.

The canonical sum of product form of the function y(A,B) = A + B is __________

a)

AB + BB + A’A

b)

AB + AB’ + A’B

c)

BA + BA’ + A’B’

d)

AB’ + A’B + A’B’

33.

Convert the given expression in standard POS form

f(A,B,C,D)= (A+B) . (B+C)

a)

(A+B+C) (A+B+C') (A'+B+C)

b)

(A+B+C') (A+B'+C') (A'+B+C)

c)

(A+B'+C) (A'+B+C') (A'+B+C)

d)

(A+B+C) (A+B+C')

34.

A variable on its own or in its complemented form is known as a __________

a)

Product Term

b)

Literal

c)

Sum Term

d)

Word

35.

The expression Y=AB+BC+AC shows the _________ operation.

a)

EX-OR

b)

SOP

c)

POS

d)

NOR

36.

The SOP form of Boolean Expression can be represented in K Map, when output is

a)

0

b)

1

c)

Either (a) or (b)

d)

None

37.

The POS form of Boolean expression can be represented in K Map when the output is

a)

1

b)

0

c)

Either (a) or (b)

d)

None

38.

In K map, octet is a group of...............1's.

a)

3

b)

5

c)

8

d)

16

39.

Total number of inputs in a half adder is _______

a)

2

b)

4

c)

3

d)

1

40.

If A and B are the inputs of a half adder, the sum is given by __________

a)

A AND B

b)

A OR B

c)

A XOR B

d)

A EX-NOR B

41.

If A and B are the inputs of a half adder, the carry is given by __________

a)

A AND B

b)

A OR B

c)

A XOR B

d)

A EX-NOR B

42.

The difference between half adder and full adder is __________

a)

Half adder has two inputs while full adder has four inputs

b)

Half adder has one output while full adder has two outputs

c)

Half adder has two inputs while full adder has three inputs

d)

All of the Mentioned

43.

If A, B and C are the inputs of a full adder then the sum is given by __________

a)

A AND B AND C

b)

A OR B AND C

c)

A XOR B XOR C

d)

A OR B OR C

44.

If A, B and C are the inputs of a full adder then the sum is given by __________

a)

A AND B AND C

b)

A OR B AND C

c)

A XOR B XOR C

d)

A OR B OR C

45.

If A, B and C are the inputs of a full adder then the carry is given by __________

a)

A AND B OR (A OR B) AND C

b)

A OR B OR (A AND B) C

c)

(A AND B) OR (A AND B)C

d)

A XOR B XOR (A XOR B) AND C

46.

In a multiplexer, the selection of a particular input line is controlled by ___________

a)

Data controller

b)

Selected lines

c)

Logic gates

d)

Both data controller and selected lines

47.

If the number of n selected input lines is equal to 2^m then it requires _____ select lines.

a)

2

b)

m

c)

n

d)

2n

48.

a)

Comparator

b)

Multiplexer

c)

Inverter

d)

Demultiplexer

49.

Most demultiplexers facilitate which type of conversion?

a)

Decimal-to-hexadecimal

b)

Single input, multiple outputs

c)

AC to DC

d)

Odd parity to even parity

50.

For subtracting 1 from 0, we use to take a _______ from neighbouring bits.

a)

Carry

b)

Borrow

c)

Input

d)

Output

51.

How many outputs are required for the implementation of a subtractor?

a)

1

b)

2

c)

3

d)

4

52.

Half subtractor is used to perform subtraction of ___________

a)

2 bits

b)

3 bits

c)

4 bits

d)

5 bits

53.

Let the input of a subtractor is A and B then what the output will be if A = B?

a)

0

b)

1

c)

A

d)

B

54.

One that is not the outcome of magnitude comparator is ____________

a)

a > b

b)

a - b

c)

a < b

d)

a = b

55.

If two numbers are not equal then binary variable will be ____________

a)

0

b)

1

c)

A

d)

B

56.

How many inputs are required for a digital comparator?

a)

1

b)

2

c)

3

d)

4

57.

In a comparator, if we get input as A>B then the output will be ____________

a)

1

b)

0

c)

A

d)

B

58.

Comparators are used in ____________

a)

Memory

b)

Mother Board

c)

Hard Drive

d)

CPU

59.

A circuit that compares two numbers and determine their magnitude is called ____________

a)

Height comparator

b)

Size comparator

c)

Comparator

d)

Magnitude comparator

60.

What is the answer to 010 + 010?

a)

110

b)

010

c)

100

d)

011

BEDLC_UNIT 2 _PRACTICE QUIZ

Total questions: 60

Worksheet time: 3600secs

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