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

The output will be one in case any input is one in the case of.

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

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

• A A
• n A B
• 0 C
• 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

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

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D

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

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

The half adder circuit has

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

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

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

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

Boolean algebra is also known as.

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

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

• x A
• y B
• 1+x C
• 1+y D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D