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

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

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

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

The half adder circuit has

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

Pick up wrong logical expression

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• 0 A
• 1 B
• x C
• 
  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

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

The output will be one in case any input is one in the case of.

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

The logic device that perform Boolean multiplication is.

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