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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

The heart of analog to digital converter (ADC) is

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

Which of the following gate is two level logic gate.

• OR gate A
• AND gate B
• EXCLUSIVE OR gate C
• NAND 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

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

Boolean algebra is also known as.

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

The output will be one in case any input is one in the case of.

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

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

• x . y A
• x + y B
• x . y C
• x . y 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 half adder circuit has

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

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D