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

An AND gate will function as OR if.

• all the inputs to the gates are "I" A
• all the inputs are "O" B
• a Not gate is added to it C
• all the inputs and outputs are complemented D

Which of the following gate is two level logic gate.

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

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

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

• A A
• n A B
• 0 C
• 1 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

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

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

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

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

Logical multiplication refers to operation of.

• OR gate A
• AND gate B
• NOT gate C
• inverter gater 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

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D