Exam-GK-MCQ-Questions.Com

Home - Ugc Net Computer Science - Practice Questions - Computer System Architecture - Digital Logic Circuits - Combinational Circuits

Computer System Architecture - Digital Logic Circuits - Combinational Circuits Online Exam Quiz

Important questions about Computer System Architecture - Digital Logic Circuits - Combinational Circuits. Computer System Architecture - Digital Logic Circuits - Combinational Circuits MCQ questions with answers. Computer System Architecture - Digital Logic Circuits - Combinational Circuits exam questions and answers for students and interviews.

Options

A : NOR

B : AND

C : OR

D : NAND

2. The time required for a gate or inverter to change its state is called

Options

A : Rise time

B : Decay time

C : Propagation time

D : Charging time

3. The time required for a pulse to change from 10 to 90 percent of its maximum value is called

Options

A : Rise time

B : Decay time

C : Propagation time

D : Operating speed

4. The maximum frequency at which digital data can be applied to gate is called

Options

A : Operating speed

B : Propagation speed

C : Binary level transaction period

D : Charging time

Options

A : one

B : two

C : three

D : four

46. Which one of the following logic expression is incorrect?

Options

A : 1 ⊕ 0 = 1

B : 1 ⊕ 1 ⊕ 0 = 1

C : 1 ⊕ 1 ⊕ 1 = 1

D : 1 ⊕ 1 = 0

48. The black box in the following figure consists of a minimum complexity circuit that uses only AND,OR and NOT gates. The function f (x,y,z) = 1 whenever x , y are different and 0 otherwise. In addition the 3 inputs x,y,z are never all the same value. Which of the following equation lead to the correct design for the minimum complexity circuit?

Options

A : x'y + xy'

B : x + y'z

C : x'y'z' + xy'z

D : xy + y'z + z'

49. If A ⊕ B = C, then

Options

A : A ⊕ C = B

B : B ⊕ C = A

C : A ⊕ B ⊕ C = 0

D : Both (a) & (b)

Options

A : OR gate

B : AND gate

C : NAND gate

D : EX-OR GATE

51. For the circuit shown for AB = 00, AB = 01, C, S values respectively are

Options

A : 0 , 0 and 0, 1

B : 0, 0 and 1, 0

C : 0, 1 and 0, 0

D : 1, 0 and 0, 0

Options

A : NAND

B : NOR

C : AND

D : EQUIVALENCE

53. The circuit shown below is the

Options

B : Full subtractor

C : Parity checker

D : None of these

Options

A : Gate no. 1

B : Gate no. 2

C : Gate no. 3

D : Gate no. 4

Options

A : NOT

B : OR

C : AND

D : XOR

56. What logic function is performed by the circuit shown below?

Options

A : Ring counter

B : Ripple counter

57. What is the Boolean expression for the following circuit?

Options

A : F(A, B) = ( A + B' )' . ( B + A' )'

B : F( A, B ) = 1 ( Tautology )

C : F( A, B ) = ⊕ ( inconsistency)

D : F ( A, B ) = A ⊕ B ( A exclusive OR'ed with B)

Options

A : AND

B : NOR

C : NAND

D : OR

Options

A : 0

B : 1

C : x

D : x'

Options

A : V cc

B : G nd

C : Pin 14

D : Pin 1

Options

A : 31

B : 10

C : 127

D : 1023