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

Pick up wrong logical expression

• 
  A
• 
  B
• 
  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

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

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

In Boolean algebra A.A.A.A.A

• 5A A
• A B
• A⁵ C
• 1 D

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x 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

The heart of analog to digital converter (ADC) is

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

Odd parity of a word can be conveniently tested by.

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 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

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

• 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

• 0 A
• 1 B
• x C
• 
  D

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D