Compiler, Interpreter, Editor, Debugging, Testing + YouTube Lesson
Watch this video for a quick and clear explanation of Compiler, Interpreter, Editor, Debugging & Testing.
1. What is Compiler?
A compiler is a special program that processes statements written in a particular programming
language and turns them into machine language or “code” that a computer’s processor uses.
It translates the source code from a high-level programming language
(e.g., C, C++, Java, Pascal, C#, Perl, etc.) into executable machine code.
2. What is Interpreter?
An interpreter translates high-level instructions into an intermediate form, which it then executes directly.
Unlike a compiler, which translates the entire program at once, an interpreter executes the program line by line.
3. Difference Between Compiler and Interpreter
| Compiler | Interpreter |
|---|---|
| Translates the whole program at once. | Translates and executes line by line. |
| Faster execution once compiled. | Slower execution due to line-by-line processing. |
| Errors are shown after compilation. | Errors are shown immediately during execution. |
4. What is Editor?
An editor (text editor) is a software program that allows users to create and edit plain text files.
Widely used in programming, examples include Notepad++, VS Code, Sublime Text, etc.
5. What is Debugging?
Debugging is the process of identifying, analyzing, and fixing errors (bugs) in a program.
Steps in Debugging:
- Problem identification and report preparation
- Verification and defect analysis
- Defect resolution with required code changes
- Validation and re-testing
6. What is Testing?
Software testing is the process of verifying a system to identify errors, gaps, or missing requirements.
Ensures the software functions as intended per user requirements.
Types of Testing: Functional Testing and Non-functional Testing.
7. Difference Between Testing and Debugging
| Testing | Debugging |
|---|---|
| Finding errors/bugs in the software. | Fixing errors/bugs found during testing. |
| Done by testers or QA team. | Done by programmers or developers. |
| Can be automated. | Cannot be automated. |
| Does not require deep design knowledge. | Requires understanding of software design. |