How do compilers and interpreters differ in translating programming languages to machine code?

How do compilers and interpreters differ in translating programming languages to machine code?

• A. Interpreters translate source code into machine code ahead of time, creating standalone executables.
• B. Compilers translate source code into standalone machine code, while interpreters translate and execute code line by line at runtime.
• C. Both tools perform the same function in all cases.
• D. Interpreters execute code directly without producing machine code.

Answer: (B)

Understanding how translation happens is the key difference between compilers and interpreters. A compiler takes the entire program and converts it into machine code that can run on its own as a standalone executable. You provide the source once, run the produced executable, and there’s no need for the compiler during execution. An interpreter, by contrast, reads the source and executes it directly, translating and running statements as the program runs, typically line by line at runtime. This is why compiled programs tend to run faster, since the translation is done beforehand, while interpreted programs are more flexible and easier to test and modify on the fly. Hybrid approaches exist (like compiling to intermediate bytecode and then interpreting or JIT compiling), but the core distinction remains between ahead-of-time compilation versus runtime interpretation.

Understanding how translation happens is the key difference between compilers and interpreters. A compiler takes the entire program and converts it into machine code that can run on its own as a standalone executable. You provide the source once, run the produced executable, and there’s no need for the compiler during execution. An interpreter, by contrast, reads the source and executes it directly, translating and running statements as the program runs, typically line by line at runtime. This is why compiled programs tend to run faster, since the translation is done beforehand, while interpreted programs are more flexible and easier to test and modify on the fly. Hybrid approaches exist (like compiling to intermediate bytecode and then interpreting or JIT compiling), but the core distinction remains between ahead-of-time compilation versus runtime interpretation.