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

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

• A A
• n A B
• 0 C
• 1 D

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

• x + y A
• 
  B
• 
  C
• 
  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

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

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

In Boolean algebra A.A.A.A.A

• 5A A
• A B
• A⁵ C
• 1 D

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

The logic device that perform Boolean multiplication is.

• AND gate A
• OR gate B
• Inverter C
• None of these 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

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

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D