IT Glossary for Recruiters

What is a Source Code?

Source code is the set of instructions written in a programming language. Developers write this code to build software and applications. It is what makes a computer or mobile app work the way it does. The code can be edited, modified, and updated to create or change features in the software.

Why Source Code is Important

Software and apps can't exist without source code. It serves as the blueprint for everything that operates on a computer. The code directs the computer on what actions to take and how to perform them. Source code is important because it allows developers to create, maintain, and enhance software over time.

It also offers flexibility. When the source code is accessible, developers can update or modify a program as required. For instance, they can fix bugs or add new features without needing to rebuild the entire software from the beginning.

Components of Source Code

  • Functions/Methods: Blocks of code that carry out particular actions or tasks, like calculating a number or displaying a message.

  • Variables: Used to store data that the program needs. For example, a variable could store a user’s name or a score in a game.

  • Cycles: Repeating sections of code that make the program do something multiple times without writing the same code over and over.

  • Conditionals (If/Else): These help the program make decisions. For instance, if a user enters the wrong password, the program might ask them to try again.

  • Libraries/Frameworks: Pre-written code that developers can use to speed up development. These tools provide common functionality, so developers don't have to write everything from scratch.

Programming Languages Used for Source Code


Java: A versatile language used for building large-scale applications and Android apps.Python: Known for its simplicity, it is used for web development, machine learning, and automation tasks.C++: A high-performance language often used for systems software, video games, and applications that require a lot of computing power.JavaScript: Important for web development, JavaScript enables interactivity on websites.● Ruby: It is a language used for building websites and web applications, particularly with the Ruby on Rails framework.

Writing and Managing Source Code

Good source code should be clean and easy to read. Developers follow best practices to ensure their code is simple and understandable. Some important practices include:Commenting: Adding clear comments throughout the code to explain its purpose. This is especially helpful when working in teams.Indentation and formatting: Writing code in an organized manner so that it’s easy for other developers (or yourself in the future) to read and update. Version Control: Tools like Git track changes made to the source code over time. This allows multiple developers to work on the same project without interfering with each other’s work.

Compiling Source Code

Once source code is written, it needs to be converted into a format that the computer can understand and execute. This is done using a compiler or interpreter.
Compiled languages like C++ and Java are turned into machine code, which the computer can execute directly.
Interpreted languages such as Python and JavaScript are executed line by line without the need for a compilation step.

Securing Source Code

Security is a big concern when it comes to source code. If the code is exposed to unauthorized people, it can be copied, modified, or used maliciously. Developers take several measures to secure source code:Encryption: Converting the code into a secure format to prevent unauthorized access.Access Control: Only allowing certain people or groups to view or change the code.Private Repositories: Using platforms like GitHub or GitLab to store source code in private spaces where only authorized users can access it.

Source Code Licensing

When developers create source code, they can choose how to share it with others. Two common ways to share source code are:Open Source: Developers allow others to view, modify, and distribute the code. This encourages collaboration and community contributions.Closed Source: The source code is kept private, and only the original developer or company has the rights to use or modify it.

Benefits of Source Code

    Customization: Developers can modify the source code to meet specific needs or preferences.
    Collaboration: Open-source code allows developers from around the world to work together on projects, improving quality and innovation.
    Bug Fixes: Having access to source code makes it easier to identify and fix errors, improving the software’s reliability.

Drawbacks of Source Code

    Security risks: Disclosing source code can lead to vulnerabilities if attackers gain access to it.
    Complexity: Large and complex codebases can be difficult to maintain and debug, especially when multiple developers are involved.
    Intellectual Property Issues: Without proper licensing, there can be legal disputes over who owns the source code and how it can be used.

Best Practices for Source Code

Write Clear and Simple Code

Keep your code easy to read. Use simple and clear names for variables, functions, and methods. Avoid making your code too complicated.

Add Comments

Write comments to explain what your code does. This helps other developers (and yourself) understand how the code works.

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Use Version Control

Use tools like Git to track changes. Version control helps you collaborate with others and go back to previous versions if needed.