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

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y 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

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

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

If A and B are two 1-bit numbers, what logic gates will be required to test for A=B?

• NOR gate A
• EXCLUSIVE OR gate B
• EXCLUSIVE NOT gate C
• OR gate D

The logic device that perform Boolean multiplication is.

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

The circuit that is used for parallel to serial conversion is

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

Logical multiplication refers to operation of.

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

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

Boolean algebra is also known as.

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

• 0 A
• 1 B
• x C
• 
  D

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

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