Question 1

What is a number base?

Accepted Answer

How many unique digits before carrying. Decimal: 0-9 (10 digits). Binary: 0-1 (2 digits).

Question 2

What is positional notation?

Accepted Answer

Digit value depends on position. In 123: 1 is hundreds, 2 is tens, 3 is ones. Works for any base.

Question 3

Why do computers use binary?

Accepted Answer

Electronic circuits have two states: on/off, high/low voltage. Binary (0 and 1) maps directly to these states, making digital logic simpler and more reliable.

Question 4

Why is hexadecimal used in programming?

Accepted Answer

Hex is compact: each digit represents 4 binary bits. A byte (8 bits) is exactly 2 hex digits (00-FF), making memory addresses and color codes readable.

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