Which term defines the binary number system base 2, using only bits 0 and 1?

Which term defines the binary number system base 2, using only bits 0 and 1?

• A. Hexadecimal
• B. Natural language
• C. Binary
• D. Oval (Flowchart)

Answer: (C)

Binary is the numeral system that uses base 2 and only the digits 0 and 1. In this system, each position represents a power of two, so a string of bits encodes a value by summing those powers of two. For example, 1101 equals 1×8 + 1×4 + 0×2 + 1×1 = 13. This dual-state logic is why computers use binary, matching how digital circuits switch between two states. Other options don’t fit because hexadecimal is base-16 (digits 0–9 and A–F), natural language is human speech or writing, and Oval (Flowchart) is a diagram symbol, not a numeral system.

Binary is the numeral system that uses base 2 and only the digits 0 and 1. In this system, each position represents a power of two, so a string of bits encodes a value by summing those powers of two. For example, 1101 equals 1×8 + 1×4 + 0×2 + 1×1 = 13. This dual-state logic is why computers use binary, matching how digital circuits switch between two states. Other options don’t fit because hexadecimal is base-16 (digits 0–9 and A–F), natural language is human speech or writing, and Oval (Flowchart) is a diagram symbol, not a numeral system.