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

The 'Boolean Algebra' is based on the premise that

• there are two states A
• differential equations can be solved by analog circuits. B
• either a statement is true or false C
• arithmetic operations can be carried out D

NAND gates are preferred over others because these.

• have lower fabrication area A
• can be used to make any gate B
• consume least elctronic power C
• provide maximum density in a chip D

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

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

• 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

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 x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

• 0 A
• 1 B
• x C
• 
  D

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

• x A
• y B
• 1+x C
• 1+y 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 function is referred as the complementary.?

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

The logic device that perform Boolean multiplication is.

• AND gate A
• OR gate B
• Inverter C
• None of these D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D