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

Which of the following gate is two level logic gate.

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

The logic device that perform Boolean multiplication is.

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

The half adder circuit has

• one input A
• two inputs B
• three inputs C
• always more than two inputs 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

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

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

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

Logical addition refers to operation of

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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

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

• 0 A
• 1 B
• x C
• 
  D

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

The circuit that is used for parallel to serial conversion is

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

• x + y A
• 
  B
• 
  C
• 
  D