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

Which of the following statement is true in the case of AND gate with input A and B.

• If A and B are applied, there will not be any output A
• If neither input is applied, there will be an output B
• If one input is applied there will not be any output C
• If one input is applied there will be an output D

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

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  D

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

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

• 0 A
• 1 B
• x C
• 
  D

• x + y A
• 
  B
• 
  C
• 
  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

The number of inputs to full adder are

• 1 A
• 2 B
• 3 C
• 4 D

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

• A A
• n A B
• 0 C
• 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

The circuit that is used for parallel to serial conversion is

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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

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

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