Java Programming - OOP Concepts

Q1: What is the principle of inheritance in Java? (Java में इनहेरिटेंस का सिद्धांत क्या है?)

A class can inherit properties and methods from another class A class cannot inherit from another class A class can inherit properties but not methods A class can inherit methods but not properties

Q2: What is polymorphism in Java? (Java में पोलिमॉर्फिज़्म क्या है?)

Ability to have multiple forms Ability to execute code in multiple threads Ability to store objects in arrays Ability to inherit properties from other classes

Q3: What is encapsulation in Java? (Java में एन्कैप्सुलेशन क्या है?)

Hiding the internal state and requiring all interaction to be performed through methods Storing data in arrays The ability to inherit properties from other classes Accessing external resources in Java

Q4: What does the term "method overloading" mean in Java? (Java में "मेडथ ओवरलोडिंग" का क्या मतलब है?)

Defining multiple methods with the same name but different parameters Defining methods with the same name and parameters Defining methods with different names Defining methods in the superclass

Q5: Which keyword is used to create an instance of a class in Java? (Java में एक क्लास का उदाहरण बनाने के लिए कौन सा कीवर्ड उपयोग किया जाता है?)

new create instance object

Q6: What is the purpose of the "super" keyword in Java? (Java में "super" कीवर्ड का उद्देश्य क्या है?)

To call a superclass constructor or method To create a new object To refer to the current class To initialize a variable

Q7: What is an abstract class in Java? (Java में एब्सट्रैक्ट क्लास क्या है?)

A class that cannot be instantiated and may have abstract methods A class that can be instantiated A class that does not contain any methods A class with only static methods

Q8: Which of the following is a feature of Java classes? (निम्नलिखित में से कौन सा Java क्लास का एक विशेषता है?)

Classes can contain methods and variables Classes can only contain methods Classes can only contain variables Classes cannot contain constructors

Q9: What is method overriding in Java? (Java में मेथड ओवरराइडिंग क्या है?)

A subclass provides a specific implementation of a method already defined in its superclass A subclass cannot have methods A method can be called with different parameters A method can be inherited without being modified

Q10: What is a constructor in Java? (Java में कंस्ट्रक्टर क्या है?)

A special method used to initialize objects A method that returns a value A method used for method overloading A method used to delete objects