What is a binary number used for in computing?

What is a binary number used for in computing?

• A. A type of memory storage
• B. A numbering system using base-2; used to represent computer data and instructions at the lowest level
• C. A numbering system using base-10; used for daily arithmetic
• D. A method of encrypting data

Answer: (B)

Binary numbers are base-2; computers rely on two electrical states to represent information. A single bit is either 0 or 1, and by grouping bits into bytes and larger words, machines encode numbers, text, colors, and even instructions. This binary representation is what makes data and operations possible at the hardware level, so the binary number system is the fundamental language used to store and process information in computing. The idea of memory storage describes a hardware capability, not the numeral system itself. Decimal is base-10 and is used by humans for daily arithmetic, not for internal computer encoding. Encryption is a technique that can operate on binary data, but binary is the medium of representation, not the method of securing data.

Binary numbers are base-2; computers rely on two electrical states to represent information. A single bit is either 0 or 1, and by grouping bits into bytes and larger words, machines encode numbers, text, colors, and even instructions. This binary representation is what makes data and operations possible at the hardware level, so the binary number system is the fundamental language used to store and process information in computing. The idea of memory storage describes a hardware capability, not the numeral system itself. Decimal is base-10 and is used by humans for daily arithmetic, not for internal computer encoding. Encryption is a technique that can operate on binary data, but binary is the medium of representation, not the method of securing data.