A Level Logic Gates Quiz 1

15 Questions

Quiz Description

Hi everyone!. Welcome to gcequiz.com where in this quiz, we are going to be looking at Logic Gates. It has to do with the fundamental logic gates such as the AND gate, OR gate, NOT gate, NOR gate, NAND gate, and so on. 

A logic gate is an idealized model of computation or physical electronic device that implements a Boolean function, performs a logical operation on one or more binary inputs, producing a single logic output. The implementation of logic gates is usually done using diodes and transistors. The diodes and transistors here act as switches, enabling the device to be switched from one state to another. With amplification, logic gates can be cascaded in the same way that Boolean functions can be composed, permitting the construction of a physical model of all of Boolean Logic.  In modern practice, most logic gates are made from MOSFETs.

You can go and test your knowledge with the quizzes 

Good luck

1:

In which of the following gates, the output is 1, if and only if at least one input is 1?


Correct
  • 1:
    AND
  • 2:
    OR
  • 3:
    NOR
  • 4:
    NAND
2:

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


Correct
  • 1:
    Rise time
  • 2:
    Decay time
  • 3:
    Propagation time
  • 4:
    Charging time
3:

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


Correct
  • 1:
    Rise time
  • 2:
    Decay time
  • 3:
    Propagation time
  • 4:
    Operating speed
4:

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


Correct
  • 1:
    Operating speed
  • 2:
    Propagation speed
  • 3:
    Binary level transaction period
  • 4:
    Charging time
5:

What is the minimum number of two-input NAND gates used to perform the function of two input OR gate ?


Correct
  • 1:
    one
  • 2:
    two
  • 3:
    three
  • 4:
    four
6:

Odd parity of word can be conveniently tested by


Correct
  • 1:
    OR gate
  • 2:
    AND gate
  • 3:
    NOR gate
  • 4:
    XOR gate
7:

Identify the logic function performed by the circuit shown in the given figure
logic-circuit


Correct
  • 1:
    Exclusive OR
  • 2:
    NOR
  • 3:
    NAND
  • 4:
    Exclusive NOR
8:

 Which one of the following will give the sum of full adders as output ?


Correct
  • 1:
    Three point majority circuit
  • 2:
    Three bit parity checker
  • 3:
    Three bit comparator
  • 4:
    Three bit counter
9:

The number of full and half-adders required to add 16-bit numbers is


Correct
  • 1:
    8 half-adders, 8 full-adders
  • 2:
    16 half-adders, 0 full-adders
  • 3:
    4 half-adders, 12 full-adders
  • 4:
    1 half-adder, 15 full-adders
10:

 Which of the following gates would output 1 when one input is 1 and other input is 0 ?


Correct
  • 1:
    OR gate
  • 2:
    AND gate
  • 3:
    NAND gate
  • 4:
    both (a) and (c)
11:

Which of the following statements is wrong?


Correct
  • 1:
    propagation delay is the time required for a gate to change its state
  • 2:
    Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state
  • 3:
    Fan-in of a gate is always equal to fan-out of the same gate
  • 4:
    Operating speed is the maximum frequency at which digital data can be applied to a gate
12:

Which of the following expressions is not equivalent to X ' ?


Correct
  • 1:
    X NOR 1
  • 2:
    X NAND 1
  • 3:
    X NOR X
  • 4:
    X NAND X
13:

Which of the following gates are added to the inputs of the OR gate to convert it to the NAND gate ?


Correct
  • 1:
    AND
  • 2:
    NOT
  • 3:
    OR
  • 4:
    XOR
14:

 The EXCLUSIVE NOR gate is equivalent to which gate followed by an inverter ?


Correct
  • 1:
    XOR
  • 2:
    AND
  • 3:
    OR
  • 4:
    NAND
15:

A one-to-four line demultiplexer is to be implemented using a memory. How many bits must each word have ?


Correct
  • 1:
    2 bits
  • 2:
    1 bit
  • 3:
    4 bits
  • 4:
    8 bits

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A Level Logic Gates Quiz 1
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