Digital Circuit and Microprocessor MCQs

Question 1

According to the algebra of logic, (A + A) equals

Accepted Answer

A

Answer

1

Answer

0

Answer

AA

Question 2

According to the Absorptive Laws of Boolean algebra, expression (A + AB) equals

Accepted Answer

B

Answer

A

Answer

AB

Answer

X

Question 3

When we demorganize A B,weget

Accepted Answer

-A- + 3

Answer

-A- B

Answer

B

Answer

X + T3

Question 4

. The dual of he statement (A + 1)=1 is

Accepted Answer

A.A= 1

Answer

A. 1 =A

Answer

A.0 = 0

Answer

A+A=A

Question 5

Saturated logic circuit have

Accepted Answer

low switching speed

Answer

short saturation delay time

Answer

higher power dissipation

Answer

lower noise immunity

Question 6

Special feature of I2L logic circuit is that it

Accepted Answer

is a bipolar saturated logic

Answer

uses only high-value resistors

Answer

dissipates negligible power

Answer

iseasy to fabricate

Question 7

A unique advantageous feature of CMOS logic family is its

Accepted Answer

power dissipation in nanowatt range

Answer

use of NMOS circuits

Answer

speed

Answer

dependence on frequency for power dissipation

Question 8

CMOS circuits are extensively used for one-chip computers mainly because of their extremely

Accepted Answer

large packing density

Answer

low power dissipation

Answer

high noise immunity

Answer

low cost

Question 9

Power is drawn by a CMOS circuit only when

Accepted Answer

it switches logic levels

Answer

its output is high

Answer

its output is low

Answer

in static state