Compilation vs Interpretation in Programming
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Questions and Answers

What is the output of a compiler?

  • Object code (correct)
  • Intermediate code
  • Machine code
  • Source code

    • What is the role of the scanner in a compiler?

  • To execute the program
  • To generate object code
  • To parse the source program
  • To read in the source program and break it into tokens (correct)

    • What is the brain of the compiler?

  • Parser (correct)
  • Code generator
  • Scanner
  • Executor

    • What is the main difference between a compiler and an interpreter?

    <p>A compiler translates the entire program at once, while an interpreter translates line by line</p> Signup and view all the answers

    Which of the following is an example of an interpreted language?

    <p>JavaScript</p> Signup and view all the answers

    What is the role of the parser in a compiler?

    <p>To know the syntax and semantics of the source language</p> Signup and view all the answers

    What is the equivalent of the code generator in an interpreter?

    <p>Executor</p> Signup and view all the answers

    What is the purpose of the code generator in a compiler?

    <p>To generate object code</p> Signup and view all the answers

    Study Notes

    Compilation and Interpretation of Programs

    • A compiler translates a high-level language program into an intermediate form called object code, which can be directly executed by the machine.
    • An interpreter does not produce object code, but translates the source program line by line into machine language.

    Examples of Compiled and Interpreted Languages

    • Examples of compiled languages include: C, C++, C#, Ada, ALGOL, Java, COBOL, Visual Basic, Lisp, FORTRAN, Pascal
    • Examples of interpreted languages include: QBASIC, JavaScript, PHP, ASP, APL

    How a Compiler Works

    • The parser is the brain of the compiler, knowing the syntax and grammatical rules of the source language.
    • The parser uses a scanner to read in source program statements and break them into a sequence of tokens (words, numbers, identifiers, operators, etc.).
    • The parser calls the code generator to produce object code, which performs the operation specified by the instruction.
    • The process continues until the entire program has been read in and translated.

    How an Interpreter Works

    • An interpreter also has a parser that controls it, with a scanner that does the same job as the compiler's scanner.
    • Instead of a code generator, an interpreter has an executor that directly executes the translated code.
    • The interpreter translates the source program line by line into machine language, without producing object code.

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    Description

    Learn about the difference between compilation and interpretation in programming languages, including examples of compiled languages such as C, C++, and Java.

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