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object code

C2
UK/ˈɒb.dʒekt ˌkəʊd/US/ˈɑːb.dʒekt ˌkoʊd/

Technical (Computing)

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Definition

Meaning

Machine-readable code generated by a compiler from source code.

The low-level binary or assembly language output of a compilation process, containing machine instructions that a computer's processor can execute directly. It is an intermediate or final product between source code and an executable program.

Linguistics

Semantic Notes

Often used interchangeably with 'machine code', though purists distinguish object code as containing relocatable addresses and linking information, while machine code is the final, absolute, executable code. It's a non-count noun typically used without an article (e.g., 'generate object code').

Dialectal Variation

British vs American Usage

Differences

No significant lexical or semantic differences. Spelling conventions for related terms (e.g., 'compile'/'compiler') are identical.

Connotations

None specific to region.

Frequency

Equally frequent in technical computing contexts in both regions.

Vocabulary

Collocations

strong
generate object codelink object codeobject code fileoptimize object code
medium
produce object codecompile to object codeefficient object codeoutput object code
weak
final object codebinary object codereadable object codedebug object code

Grammar

Valency Patterns

The compiler + VERB + object code (e.g., generates, produces, outputs)Linking + VERB + multiple object code filesObject code + can be + VERB-ed (e.g., executed, linked, analyzed)

Vocabulary

Synonyms

Strong

machine code (in final, absolute form)binary output

Neutral

machine codebinary codeexecutable code

Weak

compiled outputlow-level code

Vocabulary

Antonyms

source codehuman-readable codehigh-level code

Phrases

Idioms & Phrases

  • “From source to object (describing the compilation process)”

Usage

Context Usage

Business

Rare. Might appear in technical project specifications or software development contracts.

Academic

Common in computer science, software engineering, and compiler design textbooks and papers.

Everyday

Virtually never used.

Technical

The primary register. Used daily by software developers, compiler writers, and systems programmers.

Examples

By Part of Speech

verb

British English

  • The compiler will object code the modules separately.
  • We need to object-code these libraries for the ARM architecture.

American English

  • The compiler will object code the modules separately.
  • We need to object-code these libraries for the ARM architecture.

adverb

British English

  • N/A

American English

  • N/A

adjective

British English

  • The object-code format is ELF.
  • We analysed the object-code dump.

American English

  • The object-code format is ELF.
  • We analyzed the object-code dump.

Examples

By CEFR Level

B1
  • The computer cannot understand source code; it needs object code.
B2
  • After successful compilation, the object code is saved in a file with a .obj or .o extension.
  • The linker combines multiple pieces of object code into a single executable program.
C1
  • Modern compilers often perform sophisticated optimisations at the object code level to improve performance.
  • Analysing the generated object code can provide insights into the efficiency of your source code algorithms.

Learning

Memory Aids

Mnemonic

Think of a factory: SOURCE CODE is the detailed blueprint (human-readable). The OBJECT CODE is the set of manufactured parts (machine-readable) ready to be assembled (linked) into a final product (the executable).

Conceptual Metaphor

MANUFACTURING / TRANSLATION. Source code is the 'recipe' or 'source language,' and object code is the 'manufactured product' or 'translated target language' for the machine.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Avoid direct translation of 'object' as 'объект' in this context. The computing term is 'объектный код'.
  • Do not confuse with 'object-oriented programming' ('объектно-ориентированное программирование'), which is a different, though related, concept.

Common Mistakes

  • Using 'object code' to refer to the source code of an object-oriented program.
  • Pronouncing 'object' as the verb (/əbˈdʒekt/) instead of the noun (/ˈɒb.dʒekt/).
  • Treating it as a countable noun (e.g., 'an object code').

Practice

Quiz

Fill in the gap
The that the processor can execute.
Multiple Choice

What is the primary relationship between source code and object code?

FAQ

Frequently Asked Questions

Not exactly. Object code is often one or more files that need to be linked together with libraries to create a final executable file. An executable is typically the final, linked product.

Very difficultly. It is primarily binary (1s and 0s) but can be represented in human-readable assembly language (disassembled), which is still very low-level and complex.

A compiler translates source code into object code (or an executable) ahead of time. An interpreter executes source code directly, line by line, without producing a separate object code file.

Historically, it refers to the 'object' or 'target' of the compilation process—the machine-readable code that is the goal. The 'object' is the final machine-oriented product, as opposed to the 'source'.