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

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

• 0 A
• 1 B
• x C
• 
  D

The heart of analog to digital converter (ADC) is

• comparator A
• pulse generator B
• voltage source C
• current source D

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 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

Which of the following gate is two level logic gate.

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

Logical multiplication refers to operation of.

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x 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

Logical addition refers to operation of

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

• 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