Logic Gates (Board Level)

Given below are symbols for some logic gates

The XOR gate and NOR gate respectively are

Given below are four logic gate symbol (figure). Those for OR, NOR and NAND are respectively

The following truth table corresponds to the logic gate

A    0     0     1     1

B    0     1     0     1

X    0     1     1     1

The combination of ‘NAND’ gates shown here under (figure) are equivalent to

A truth table is given below. Which of the following has this type of truth table

A   0     1     0     1

B   0     0     1     1

y   1     0     0     0

The truth table shown in figure is for

A   0     0     1     1

B   0     1     0     1

Y   1     0     0     1

For the given combination of gates, if the logic states of inputs A, B, C are as follows A = B = C = 0 and A = B = 1, C = 0 then the logic states of output D are

Boolean algebra is essentially based on

The logic behind ‘NOR’ gate is that it gives

A logic gate is an electronic circuit which