ECAT Pre Computer Science MCQ Test For Computer Chapter 5 With Answer

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

The half adder circuit has

• one input A
• two inputs B
• three inputs C
• always more than two inputs D

In a three input NAND gate, if all the inputs are 1, the output is.

• 0 A
• 1 B
• 3 C
• indeterminate D

An OR gate has 6 input. The number of input words in its truth table are.

• 6 A
• 32 B
• 64 C
• 128 D

The commutative law in Boolean Algebra, where a, b and c are binary number is.

• a+0=a A
• a+1=1 B
• a+b=b+a C
• a. (b+c) = a.b +a.c. D

Boolean algebra is.

• used for arithmetical operation is ALU A
• an aid for binary conversion B
• useful for error detection and error correction C
• used to describe the behavior and structure of logic networks and as an aid in the design of logic system D

• A + B + C + D A
• 
  B
• A + B C + D C
• 
  D

According to absorption law x. (x+y) =

• x A
• y B
• 1+x C
• 1+y D

Which of the following function is referred as the complementary.?

• OR function A
• NOT function B
• NAND function C
• AND function D

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

Which of the following operations are used by Boolean algebra.?

• Boolean addition A
• Boolean multiplication B
• Boolean complementation C
• All of the above D

• A + B + C + D A
• 
  B
• A BC D C
• A + B + C + D D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

Logical multiplication refers to operation of.

• OR gate A
• AND gate B
• NOT gate C
• inverter gater D

• x . y A
• x + y B
• x . y C
• x . y D