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

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

Odd parity of a word can be conveniently tested by.

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

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

• 0 A
• 1 B
• x C
• 
  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

According to Boolean algebra A+A+......+A is

• A A
• n A B
• 0 C
• 1 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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

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

The heart of analog to digital converter (ADC) is

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

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D