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

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

• 0 A
• 1 B
• x C
• 
  D

Logical multiplication refers to operation of.

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

• 0 A
• 1 B
• x C
• 
  D

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

• x A
• y B
• 1+x C
• 1+y D

• x + y A
• 
  B
• 
  C
• 
  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 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

The logic device that perform Boolean multiplication is.

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

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

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

• A A
• n A B
• 0 C
• 1 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 circuit that is used for parallel to serial conversion is

• decoder A
• encoder B
• multiplexer C
• demultiplexer D

The heart of analog to digital converter (ADC) is

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D