Number System in Modern Computers

Correct Answer: Binary Number System

From the notes: Modern computers and digital computers use the Binary number system (base 2), which uses only two digits: 0 and 1.

Why Binary?

Electronic circuits can represent two states easily: ON (1) and OFF (0). All data in computers is ultimately stored and processed as combinations of 0s and 1s.

Data Units (from notes)

• 1 Byte = 8 bits
• 1 GB = 1024 MB

Number Systems Comparison

• Binary (Base 2): Digits 0–1; used in computers ✔
• Octal (Base 8): Digits 0–7
• Decimal (Base 10): Digits 0–9; used by humans
• Hexadecimal (Base 16): Digits 0–9, A–F; used in programming/memory addressing