Entry level Java
Programming Interview
Questions and Answers
What are the main features of Java?
✓~ 1. Object-oriented
2. Simple
3. Platform Independent
4. Secured
5. Robust
6. Portable
7. Multithreaded
8. Distributed
What are the fundamental principles of OOP?
✓~ 1. Inheritance
2. Abstraction
3. Polymorphism
4. Encapsulation
What is Inheritance in Java?
, ✓~ Inheritance is one of the key principles of OOP. Through Inheritance, one class can
inherit the properties of another class. The class from which properties are inherited is called
a "super" class and the class to which properties are inherited is called a sub class.
What is Constructor Overloading and its use?
✓~ A class can have any number of constructors. These constructors will have different
lists of arguments. It is called constructor overloading. Constructor overloading provides
different ways to instantiate a class.
What is polymorphism in Java?
✓~ Polymorphism refers to any entity whether it is a method, constructor or an operator
which takes many forms or can be used for multiple tasks.
What is method overloading in Java?
✓~ When a class has more than one method with the same name but with different lists of
arguments.
What is method overriding?
✓~ When a super class method is modified in the sub class then it is called method
overriding.
Does Java support multiple inheritance?
Programming Interview
Questions and Answers
What are the main features of Java?
✓~ 1. Object-oriented
2. Simple
3. Platform Independent
4. Secured
5. Robust
6. Portable
7. Multithreaded
8. Distributed
What are the fundamental principles of OOP?
✓~ 1. Inheritance
2. Abstraction
3. Polymorphism
4. Encapsulation
What is Inheritance in Java?
, ✓~ Inheritance is one of the key principles of OOP. Through Inheritance, one class can
inherit the properties of another class. The class from which properties are inherited is called
a "super" class and the class to which properties are inherited is called a sub class.
What is Constructor Overloading and its use?
✓~ A class can have any number of constructors. These constructors will have different
lists of arguments. It is called constructor overloading. Constructor overloading provides
different ways to instantiate a class.
What is polymorphism in Java?
✓~ Polymorphism refers to any entity whether it is a method, constructor or an operator
which takes many forms or can be used for multiple tasks.
What is method overloading in Java?
✓~ When a class has more than one method with the same name but with different lists of
arguments.
What is method overriding?
✓~ When a super class method is modified in the sub class then it is called method
overriding.
Does Java support multiple inheritance?
