Which of the following is a key difference between a Compiler and a Linker?

• A. The Compiler produces object files, while the Linker produces executables
• B. The Compiler combines libraries, while the Linker checks syntax
• C. The Compiler manages hardware, while the Linker manages software
• D. There is no difference; they are the same too

Answer: (A)

The distinction between a compiler and a linker is rooted in their specific roles within the software development process. A compiler is responsible for translating source code written in a programming language into object files, which are intermediate binary files containing machine code but are not yet executable. This conversion includes syntax and semantic analysis, generating the corresponding machine code for functions, procedures, and data defined in the source code.

On the other hand, a linker takes one or more object files generated by the compiler and combines them into a single executable file. The linker's job is to resolve references between the various object files, ensuring that function calls and variable references are appropriately linked to the correct addresses in the final executable.

This clear division of tasks—object file generation by the compiler and executable file creation by the linker—highlights a fundamental difference between the two tools in the software build process.