Explore topic-wise MCQs in Logic Gates.

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

Which combination of gates does not allow the implementation of an arbitrary boolean function?

A demultiplexer is used to

How many full adders are required to construct an m-bit parallel adder ?

Which table shows the logical state of a digital circuit output for every possible combination of logical states in the inputs ?

Which of the following gates is known as coincidence detector ?

An AND circuit

Which one of the following set of gates are best suited for 'parity' checking and 'parity' generation.

The inverter OR-gate and AND gate are called deeision-making elements because they can recognize some input while disregarding others. A gate recognize a word when its output is

In which of the following adder circuits, the carry look ripple delay is eliminated ?

Adders

Which of the following circuit can be used as parallel to serial converter ?

A combinational logic circuit which generates a particular binary word or number is

A combinational circuit is one in which the output depends on the

The function of a multiplexer is

Extremely low power dissipation and low cost per gate can be achieved in:

An example of a universal building block is:

The full adder adds the Kth bits of two numbers to the

A full-adder is a logic circuit which can add two single order bits plus a carry in from a previous adder. Its incomplete truth table is given in the table below. The missing entry in the outputs for SUM and CARRY out are

The number of two input multiplexers required to construct a 210 input multiplexer is,

If A B = C, then

A small dot or circle printed on top of an IC indicates

Which one of the following logic expression is incorrect?

Which of the following adders can add three or more numbers at a time ?

If four 4 input multiplexers drive a 4 input multiplexer, we get a:

The characteristic equation of D flip-flop is:

The dual ofthe switching function x + yz is:

If a logic gates has four inputs, then total number of possible input combinations is

A comparison between serial and parallel adder reveals that serial order

What is the largest number of data inputs which a data selector with two control inputs can have ?

How many truth tables can be made from one function table ?

A toggle operation cannot be performed using a single

What is the minimum number of 2 input NAND gates required to implement the function
F = (x'+y') (z+w)

Which table shows the electrical state of a digital circuit's output for every possible combination of electrical states in the inputs ?

How many lines the truth table for a four-input NOR gate would contain to cover all possible input combinations ?

The output of NOR gate is

The digital multiplexer is basically a combination logic circuit to perform the operation

Write the Boolean expression for an inverter logic gate with input C and output Y.

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

The time required for a pulse to decrease from 90 to 10 per cent of its maximum value is called

Which of the following statements is wrong ?

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

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

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

Odd parity of word can beconveniently tested by

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

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

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

What logic function is produced by adding an inverter to the output of an AND gate ?

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