What is OOPs?
Object-Oriented Programming, or OOPs, is a programming paradigm that implements the concept of objects in the program. It aims to provide an easier solution to real-world problems by implementing real-world entities such as inheritance, abstraction, polymorphism, etc. in programming.
OOPs concept is widely used in many popular languages like Java, Python, C++ etc.
OOPs is one of the most important topics for programming interviews. This article contains some top interview questions on the OOPs concept.😀
Interview Questions (OOP's, C, C++ & Java)
- What do you understand by OOPS?
- Need of OOPS.
- Advantages of OOPS.
- What is class and object in OOPS?
- What are the four Pillers in OOPS. Explain with example?
- What is Data Abstraction?
- What is Data Hiding?
- What is Encapsulation explain it with example?
- What is Polymorphism. Explain it with example?
- Explain the types of Polymorphism.
- Difference between Complile time and Run time polymorphism. Explain with examples.
- What is Inline function.
- What is Void pointer?
- What is Scope Resolution Operator?
- What is Function Overloading. Explain it with example?
- What is Operator Overloading. Explain it with example?
- What is Pure Virtual function. Explain it's Syntax?
- What is Virtual Function?
- What is Recursive Function?
- What is Constructor? Explain it's types with the help of real life example or any example?
- Explain Copy Constructor with the help of example?
- What is Friend Function?
- Explain Destructor.
- Explain This Pointer.
- What is Inheritance. Explain all types.
- Explain Multiple Inheritance and Why it not be considered in Java?
- Define Abstract Class.
- What is Super and Sub class.
- What is Typecasting.
- What is Exception Handling.
- What is New and Delete operator?
- What is Overriding.
- What is Garbage Collection.
- What is Final Keyword.
- What is Try/Catch block.
- How do you do Allocate and Deallocate memory in C++?
- What is Shallow and Deep copy?
- What are Static member and Static member function?
- What do you mean by Call by Value and Call by Reference?
- Difference between C and C++?
- Difference between C++ and Java?
- Built in Function in C?
- Why doesn't C support Function overloading?
- What is Pointer in C?
- What is Macro?
- Difference between Malloc and Calloc?
- How does memory Allocated and Deallocate in C language?
- What is Dangling Pointer?
- What is Preprocessor?
- What is JDK and JRE in Java? Explain it in detail.
- What is Classloader?
- Difference between Stack and Heap memory?
- Define Packages in Java.
- Difference between Instance and Local Variable.
- Explain Java String Pool.
- Why Java is Platform Independent Language?
- Can we call Constructor inside Constructor?
- How to Print in Java.
- Who was the founder of Java, C++ and C language.
- Why is Java not a pure object oriented language?
- Can you tell the difference between equals() method and equality operator (==) in Java?
- Do final, finally and finalize keywords have the same function?
- When can you use super keyword?
- What is a singleton class in Java?
- How would you differentiate between a String, StringBuffer, and a StringBuilder?
- What is a Comparator in java?
- What is a Memory Leak? Discuss some common causes of it.
Where to Start? 🤔
With so many online sites and resources it’s very natural that one will be confused. So, to make things easier I will provide you some resources here.
Resources 😛