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

The circuit that is used for parallel to serial conversion is

• decoder A
• encoder B
• multiplexer C
• demultiplexer D

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

Boolean algebra is also known as.

• logical algebra A
• control algebra B
• switching algebra C
• programming algebra D

Logical addition refers to operation of

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

Logical multiplication refers to operation of.

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

The half adder circuit has

• one input A
• two inputs B
• three inputs C
• always more than two inputs D

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

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

Which of the following gate is two level logic gate.

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

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

• 5A A
• A B
• A⁵ C
• 1 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

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

• A A
• n A B
• 0 C
• 1 D

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D