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Describing Logic Circuits Online Exam Quiz

Important questions about Describing Logic Circuits. Describing Logic Circuits MCQ questions with answers. Describing Logic Circuits exam questions and answers for students and interviews.

1. The special software application that translates from HDL into a grid of 1's and 0's, which can be loaded into a PLD, is called a:

Options

A : formatter.

B : compiler.

C : programmable wiring.

D : CPU.

2. In VHDL, the mode of a port does not define:

Options

A : an input.

B : an output.

C : both an input and an output.

D : the TYPE of the bit.

3. For a three-input NOR gate, with the input waveforms as shown below, which output waveform is correct?

Options

A : a

B : b

C : c

D : d

4. An OR gate with inverted inputs functions as:

Options

A : an AND gate.

B : a NAND gate.

C : a NOR gate.

D : an inverter.

5. Which of the examples below expresses the associative law of addition:

Options

A : A + ( B + C ) = ( A + B ) + C

B : A + ( B + C ) = A + ( BC )

C : A ( BC ) = ( AB ) + C

D : ABC = A + B + C

7. Which of the symbols shown below represents an AND gate?

Options

A : a

B : b

C : c

D : d

9. The logic gate that will have HIGH or "1" at its output when any one of its inputs is HIGH is a(n):

Options

A : NOR gate

B : OR gate

C : AND gate

D : NOT operation

10. For a three-input AND gate, with the input waveforms as shown below, which output waveform is correct?

Options

A : a

B : b

C : c

D : d

1. For a three-input OR gate, with the input waveforms as shown below, which output waveform is correct?

Options

A : a

B : b

C : c

D : d

3. For a 3-input NAND gate, with the input waveforms as shown below, which output waveform is correct?

Options

A : a

B : b

C : c

D : d

5. Which timing diagram shown below is correct for an inverter?

Options

A : a

B : b

C : c

D : d

7. Which logic gate does this truth table describe?

Options

A : AND

B : OR

C : NAND

D : NOR

9. A small circle on the output of a logic gate is used to represent the:

Options

A : Comparator operation.

B : OR operation.

C : NOT operation.

D : AND operation.

10. The complement of 1 is 0.

Options

A : True

B : False

C :

D :

1. The Boolean expression for a three-input AND gate is X = ABC .

Options

A : True

B : False

C :

D :

2. The inputs to an AND gate are: A = 1, B = 0, C = 1. The output will be LOW.

Options

A : True

B : False

C :

D :

3. In a text-based language, the circuit being described must be given a name.

Options

A : True

B : False

C :

D :

4. A LOW placed on the input of an inverter will produce a HIGH output.

Options

A : True

B : False

C :

D :

5. A minimum of three universal NOR gates would be required to perform the logical operation of a 2-input AND gate.

Options

A : True

B : False

C :

D :

6. In an expression containing both AND and OR operations, the AND operations are performed first (unless parentheses indicate otherwise).

Options

A : True

B : False

C :

D :

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