ECAT Pre Computer Science Chapter 5 MCQ Test With Answer for Computer Science chapter 5 (Boolean Algebra)

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

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

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

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 + B C + D C
• 
  D

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

Odd parity of a word can be conveniently tested by.

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

In a three input NAND gate, if all the inputs are 1, the output is.

• 0 A
• 1 B
• 3 C
• indeterminate D

• x + y A
• 
  B
• 
  C
• 
  D

An OR gate has 6 input. The number of input words in its truth table are.

• 6 A
• 32 B
• 64 C
• 128 D

According to Boolean algebra x + 1 = ______________

• 0 A
• 1 B
• x C
• 
  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