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

Boolean algebra use which of the following to represent arithmetic quantities.

• decimal digits A
• exponents B
• binary bits C
• fractions D

• x + y A
• 
  B
• 
  C
• 
  D

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

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 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

An OR gate has 6 input. The number of input words in its truth table are.

• 6 A
• 32 B
• 64 C
• 128 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 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

• 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

According to aborption law x+x.y=

• x A
• y B
• 1 + x C
• 1 + y D

• 0 A
• 1 B
• x C
• 
  D

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

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

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