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

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

• x + y A
• 
  B
• 
  C
• 
  D

Logical addition refers to operation of

• OR gate A
• AND gate B
• NOT gate C
• invertr gate D

Boolean description for the exclusive OR gate for two inputs x and y can be written as.

• x + y __ A
• _x _y B
• x. y + x. y C
• x . y + x .y D

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D

Boolean algebra is also known as.

• logical algebra A
• control algebra B
• switching algebra C
• programming algebra D

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

Boolean expression for NOR gate with two inputs x and y can be written as.

• x + y__ A
• x. y B
• x + y C
• 
  D

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

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

• 0 A
• 1 B
• 3 C
• indeterminate D

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

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

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

Odd parity of a word can be conveniently tested by.

• OR gate A
• XOR gate B
• NOR gate C
• NAND gate D

The heart of analog to digital converter (ADC) is

• comparator A
• pulse generator B
• voltage source C
• current source D