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

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

• A A
• n A B
• 0 C
• 1 D

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

The circuit that is used for parallel to serial conversion is

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

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x 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

The commutative law in Boolean Algebra, where a, b and c are binary number is.

• a+0=a A
• a+1=1 B
• a+b=b+a C
• a. (b+c) = a.b +a.c. D

• 0 A
• 1 B
• x 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

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

Which of the following operations are used by Boolean algebra.?

• Boolean addition A
• Boolean multiplication B
• Boolean complementation C
• All of the above 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 BC D C
• A + B + C + D D

Logical addition refers to operation of

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