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 'Boolean Algebra' is based on the premise that

• there are two states A
• differential equations can be solved by analog circuits. B
• either a statement is true or false C
• arithmetic operations can be carried out 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 number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 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

Boolean expression for NOR gate with two inputs x and y can be written as.

• x + y__ A
• x. y B
• x + y 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

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y 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

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

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

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

• A A
• n A B
• 0 C
• 1 D

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

The heart of analog to digital converter (ADC) is

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