1. What is oops concepts 2. Explain inheritance with example and how to prevent inheritance in Java?. 3. What is sealed, final, static keywords in Java 4. Implement Fibonacci, factorials, prime no. 5. Return all words in string starting with given character

Question

Accepted Answer

This interview question covers various topics in Java programming, including OOP concepts, inheritance, keywords, and implementing mathematical algorithms.

OOP concepts include encapsulation, inheritance, polymorphism, and abstraction.
Inheritance allows a class to inherit properties and methods from another class.
To prevent inheritance in Java, use the 'final' keyword before the class declaration.
Sealed, final, and static are keywords in Java with different functionalities.
Implement Fibonacci, factorials, and prime numbers using loops or recursion.
To return all words in a string starting with a given character, split the string into words and filter based on the starting character.

Accepted Answer

1) Object-oriented programming (OOP) is a computer programming model that organizes software design around data, or objects, rather than functions and logic.

2To prevent inheritance, use the keyword "final" when creating the class.

3) The static keyword means the value is the same for every instance of the class. The final keyword means once the variable is assigned a value it can never be changed.

4)

Accepted Answer

class acquires the property of another class. For example, a child inherits the traits of his/her parents. With inheritance, we can reuse the fields and methods of the existing class. Hence, inheritance facilitates Reusability and is an important concept of OOPs.

In this tutorial, you will learn-

Types of Inheritance

Here are the different types of inheritance in Java:

Single Inheritance:

In Single Inheritance one class extends another class (one class only).

1. What is oops concepts 2. Explain inheritance with example and how to prevent inheritance in Java?. 3. What is sealed, final, static keywords in Java 4. Implement Fibonacci, factorials, prime no. 5. Return all words in string starting with given character

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