Definition

Noun: 1. A set of instructions coded so that the computer can use it directly without further translation: This is the lowest-level programming language, consisting of binary or hexadecimal codes that a computer's central processing unit (CPU) can execute immediately. It is the fundamental interface between software and hardware.

Usage

• Machine code is the only language a computer's processor understands directly. All high-level programming languages (like Python or Java) must ultimately be translated into machine code before a program can run.
• It is specific to the architecture of a particular CPU.
• It is typically represented in binary (0s and 1s) or hexadecimal (base-16) notation for human readability.

Examples

Advanced Usage

• "To execute machine code": To run or carry out the instructions contained in the machine code.
  • The CPU fetches and executes machine code instructions billions of times per second.
• "Raw machine code": Emphasizes the unprocessed, fundamental nature of the code.
  • The exploit injected raw machine code into the program's memory buffer.

Variants and Related Words

• Machine language: A synonym for machine code.
• Opcode (Operation Code): The portion of a machine code instruction that specifies the operation to be performed.
• Object code: The output from a compiler or assembler, often consisting of machine code ready for execution or linking.
• Assembly language: A low-level programming language that uses mnemonics to represent machine code instructions, requiring an assembler to translate it into machine code.

Synonyms

• Native code
• Binary code (though this can sometimes refer more broadly to any data in binary form)

Related Phrases/Concepts

• "To run at the machine code level": Operating with the utmost speed and direct hardware control, bypassing higher-level software layers.
  • For maximum performance, the graphics routine was written to run at the machine code level.
• "Machine code instruction": A single command in machine code.
  • Each machine code instruction tells the CPU to perform a very specific task, like adding two numbers.

Noun

1. a set of instructions coded so that the computer can use it directly without further translation