What are the main differences between C, C++, and Java?

Technical
Medium
TCS
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This broadens the technical scope to test fundamental understanding of procedural vs. object-oriented programming.

Why Interviewers Ask This

Understanding the evolution of programming languages helps assess a candidate's foundational knowledge. It reveals whether they grasp the shift from manual memory management to abstraction and safety. This is crucial for selecting the right tool for specific engineering problems.

How to Answer This Question

Start with C as the procedural foundation. Contrast it with C++ for adding OOP features while retaining low-level control. Finally, explain Java's focus on portability and strict encapsulation. Use examples like memory management and platform dependence to illustrate points clearly.

Key Points to Cover

  • Procedural vs Object-Oriented
  • Memory management styles
  • Platform dependency
  • Language evolution

Sample Answer

C is a procedural language focused on functions and manual memory management. C++ adds object-oriented features like classes and inheritance to C, allowing for polymorphism but still requiring manual memory handling. Java, however, is purely object-oriented and runs on the JVM, providing automatic garbage collection and platform independence. While C and C++ offer performance optimization, Java prioritizes security and ease of deployment.

Common Mistakes to Avoid

  • Confusing C and C++ features
  • Ignoring memory management differences
  • Overlooking JVM benefits
  • Vague generalizations

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