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What is single inheritance in Java?

• Single inheritance allows a class to inherit from one superclass only.

• Single inheritance is a feature that allows a class to inherit from an interface only.

• Single inheritance means a class cannot inherit any properties or methods.

• Single inheritance allows a class to inherit from multiple superclasses.

Can a class inherit from multiple classes in Java?

• Java supports multiple inheritance through interfaces only.

• No, a class cannot inherit from multiple classes in Java.

• Yes, a class can inherit from multiple classes in Java.

• A class can implement multiple interfaces but not inherit from multiple classes.

Explain multilevel inheritance with an example.

• class Plant { } class Tree extends Plant { } class Oak extends Tree {

• Example: class Animal { } class Mammal extends Animal { } class Dog extends Mammal { }

• class Animal { } class Cat extends Animal { }

• class Vehicle { } class Car extends Vehicle { } class Sedan extends Car { }

What is hierarchical inheritance?

• Hierarchical inheritance is a type of inheritance where multiple child classes inherit from a single parent class.

• Hierarchical inheritance is a type of inheritance where classes do not share a common ancestor.

• Hierarchical inheritance refers to a situation where all classes inherit from a common base class without any hierarchy.

• Hierarchical inheritance is when a single child class inherits from multiple parent classes.

Define hybrid inheritance in Java.

• Hybrid inheritance is achieved by using abstract classes only.

• Hybrid inheritance is when a class inherits from multiple classes directly.

• Hybrid inheritance in Java is achieved through the combination of any other inheritance types.

• Hybrid inheritance is a feature that allows a class to extend multiple classes without interfaces.

What are the advantages of single inheritance?

• Advantages of single inheritance include simplicity, reduced complexity, clear class relationships, and improved code maintainability.

• Ambiguous class relationships

• Increased code duplication

• Complex class hierarchies

How does Java handle multiple inheritance?

• Java does not support any form of inheritance.

• Java allows multiple inheritance from multiple classes directly.

• Java uses abstract classes to achieve multiple inheritance.

• Java handles multiple inheritance through interfaces

What is the purpose of the 'super' keyword in inheritance?

• To access methods and properties of a parent class in inheritance.

• To define a new class in inheritance.

• To create a copy of the parent class methods.

• To override methods in the child class.

What is the role of the 'this' keyword in Java?

• 'this' refers to the current object instance in a class.

• 'this' is used to call static methods in a class.

• 'this' is used to refer to the parent class.

• 'this' is a keyword used to create new instances of a class.

What is the main disadvantage of multiple inheritance?

• Multiple inheritance can lead to ambiguity and complexity in class relationships.

• It allows for better code reuse.

• It simplifies the class hierarchy.

• It enhances code maintainability.