TRON Softech Interview Questions and Answers for Experienced

Patterns using loops

Q1. Explain oops concept by giving an example
Ans. 
OOPs concept is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• Encapsulation: bundling data and methods that operate on the data into a single unit (object)

• Inheritance: allows a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types
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Q2. What is difference between method and function
Ans. 
A method is a function that is associated with a class or object, while a function is a standalone block of code.
• Method is defined within a class or object, while function is standalone

• Method is called using dot notation on an object, while function is called by its name

• Methods can access and modify the data of the object they belong to, while functions cannot
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Q3. Explain main method
Ans. 
Main method is the entry point of a Java program where execution begins.
• Main method must be public, static, and void.

• It must accept an array of strings as parameter.

• It is where the program starts execution.
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Q4. Explain access modifier
Ans. 
Access modifiers control the visibility and accessibility of classes, methods, and variables in a program.
• Access modifiers include public, private, protected, and default (package-private).

• Public - accessible from any other class.

• Private - accessible only within the same class.

• Protected - accessible within the same package and subclasses.

• Default - accessible only within the same package.

• Example: public class MyClass { ...read more
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Q5. Explain inheritance
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.
• Allows a class to inherit properties and behavior from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can access all public and protected members of the base class

• Example: Class Car can inherit from class Vehicle, inheriti...read more
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