Because 2⁶=64.

NOT Gate is like an inverter it is because when we gives one to the input of not gate we get zero i.e, inverts of the input. Transistor is acts as a switch means it is used for ON and OFF. This is can be done by using NOT gate.

The NOR gate is a combination OR gate followed by an inverter. Its output is true, if both inputs are false. Otherwise, the output is false.

The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation.

A group of 4 bits is called a nibble.

Commutative: A+ B = B + A

A B C 0 0 0 0 0 10 1 0 0 1 1 1 0 01 0 1 1 1 01 1 1  There are " 8" possible input combinations or 2³

Output of an AND gate is high when all inputs are high a = 1, b = 1, c = 1. Output of AND gate is = A*B*C = 1*1*1 = 1.

As per the question 3 inputs so the inputs be A, B and C then according to AND gate, it is defines the product.  So, for this three inputs it is X = ABC.

NAND and NOR are universal gates. Any function can be implemented using only NAND or only NOR gates.

OR gate is typically implemented as a NOR gate followed by an inverter.

Hex is a base 16 system. In base 16, every position in a number represents a number times a power of sixteen.

If A = 0, B = 0, C = 0 then A*B*C = 0*0*0 = 0 (since OR gate performs addition).

Volatile memory is a type of memory (storage) whose contents are erased when the system's power is turned off or interrupted. For example, RAM is a volatile memory.

A byte consists of 8 adjacent binary digits.