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

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

Which of the following statement is true in the case of AND gate with input A and B.

• If A and B are applied, there will not be any output A
• If neither input is applied, there will be an output B
• If one input is applied there will not be any output C
• If one input is applied there will be an output D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

• x + y A
• 
  B
• 
  C
• 
  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

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

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

Logical addition refers to operation of

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

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.A.A.A.A

• 5A A
• A B
• A⁵ C
• 1 D

• 0 A
• 1 B
• x C
• 
  D

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D

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

• x A
• y B
• 1+x C
• 1+y D

Boolean algebra use which of the following to represent arithmetic quantities.

• decimal digits A
• exponents B
• binary bits C
• fractions D

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D