Q.1

Which of the following equations would accurately describe a 4-input OR gate when A = 1, B = 1, C = 0, and D = 0?

  • 1 + 1 + 0 + 0 = 1
  • 1 + 1 + 0 + 0 = 01
  • 1 + 1 + 0 + 0 = 0
  • 1 + 1 + 0 + 0 = 00
Q.2

The comments in ADHL are enclosed between # characters.

  • True
  • False
Q.3

VHDL is not a new language.

  • True
  • False
Q.4

A NOR gate with one HIGH input and one LOW input:

  • will output a HIGH
  • functions as an AND
  • will not function
  • will output a LOW
Q.5

A NAND gate has:

  • active-LOW inputs and an active-HIGH output.
  • active-LOW inputs and an active-LOW output.
  • active-HIGH inputs and an active-HIGH output.
  • active-HIGH inputs and an active-LOW output.
Q.6

What is the basic difference between AHDL and VHDL?

  • ADHL is used in all PLD's.
  • VHDL is used in all PLD's.
  • ADHL is proprietary.
  • VHDL is proprietary.
Q.7

A NAND gate has:

  • active-LOW inputs and an active-HIGH output.
  • active-LOW inputs and an active-LOW output.
  • active-HIGH inputs and an active-HIGH output.
  • active-HIGH inputs and an active-LOW output.
Q.8

Which of the examples below expresses the distributive law?

  • (A + B) + C = A + (B + C)
  • A(B + C) = AB + AC
  • A + (B + C) = AB + AC
  • A(BC) = (AB) + C
Q.9

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

  • Comparator operation.
  • OR operation.
  • NOT operation.
  • AND operation.
Q.10

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

  • a
  • b
  • c
  • d
Q.11

An OR gate with inverted inputs functions as:

  • an AND gate.
  • a NAND gate.
  • a NOR gate.
  • an inverter.
Q.12

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

  • True
  • False
Q.13

Which of the following is a form of DeMorgan's theorem?

Q.14

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:

  • formatter.
  • compiler.
  • programmable wiring.
  • CPU.
Q.15

Which of the figures given below represents a NAND gate?

  • a
  • b
  • c
  • d
Q.16

Which of the figures given below represents a NOR gate?

  • a
  • b
  • c
  • d
Q.17

The timing diagram for a two-input NAND gate is shown below. The gate is working correctly.

  • True
  • False
Q.18

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

  • a
  • b
  • c
  • d
Q.19

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

  • a
  • b
  • c
  • d
Q.20

Which of the examples below expresses the distributive law?

  • (A + B) + C = A + (B + C)
  • A(B + C) = AB + AC
  • A + (B + C) = AB + AC
  • A(BC) = (AB) + C
0 h : 0 m : 1 s