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

According to Idempotent law , x + y = __________

• 1 A
• 0 B
• x C
• x . x D

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

The circuit that is used for parallel to serial conversion is

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

In Boolean algebra A.0 is

• 0 A
• 1 B
• A+0 C
• A+1 D

The heart of analog to digital converter (ADC) is

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

Odd parity of a word can be conveniently tested by.

• OR gate A
• XOR gate B
• NOR gate C
• NAND 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 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
• 
  B
• 
  C
• 
  D

The logic device that perform Boolean multiplication is.

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

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

• x A
• y B
• 1+x C
• 1+y D

Logical multiplication refers to operation of.

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

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

• 5A A
• A B
• A⁵ C
• 1 D