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Principle Interview Questions For Freshers

Explain the concept of garbage collection in Java.

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What is the purpose of the 'final' keyword in Java?

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

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

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What is the difference between method overriding and method hiding?

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How can you achieve multiple inheritances in Java?

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What is the use of 'super' keyword in Java? Provide an example.

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What is the purpose of interfaces in Java? How are they different from classes?

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What are the advantages of using object-oriented programming over procedural programming?

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What is the difference between method overloading and method overriding?

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What is a constructor and why is it used in Java?

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What is the difference between instance and static variables in Java?

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What is the difference between a class and an object?

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What are access modifiers in Java? Discuss their different levels of visibility.

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Explain the concept of abstraction in object-oriented programming.

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What is polymorphism and how is it implemented in object-oriented programming?

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What is inheritance and why is it used in object-oriented programming?

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How are classes and objects related in object-oriented programming?

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What is the purpose of encapsulation in object-oriented programming?

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Principle Intermediate Interview Questions

Explain the concept of anonymous classes in Java.

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What is the difference between static and non-static methods in Java?

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What is the use of 'throws' keyword in Java? Provide an example.

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

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What are the different types of nested interfaces in Java?

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What is the purpose of the 'super()' constructor in Java?

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What is the difference between static and non-static variables in Java?

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What is the use of 'throw' keyword in Java? Provide an example.

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Explain the concept of inner classes in Java and their different types.

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What is the difference between abstract class and interface?

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

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What is the purpose of the 'volatile' keyword in Java?

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Explain the concept of method hiding with an example.

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What is the difference between static and non-static methods in Java?

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What is the use of 'throws' keyword in Java? Provide an example.

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Explain the concept of method overloading with an example.

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What are the different types of polymorphism in Java?

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What is the difference between abstract classes and interfaces?

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Explain the four fundamental principles of object-oriented programming.

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What are the different types of inheritance in Java?

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

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Explain the concept of anonymous classes in Java.

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

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What are the different types of nested interfaces in Java?

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What is the purpose of the 'super()' constructor in Java?

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What is the difference between static and non-static variables in Java?

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What is the use of 'throw' keyword in Java? Provide an example.

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Explain the concept of inner classes in Java and their different types.

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What is the difference between abstract class and interface?

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

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What is the purpose of the 'volatile' keyword in Java?

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What is method hiding and when is it used?

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What is the difference between shallow copy and deep copy?

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What is the purpose of the 'abstract' keyword in Java?

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What is the difference between final, finally, and finalize in Java?

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What are the different types of access modifiers in Java?

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Explain the concept of method overriding with an example.

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What is the purpose of exception handling in Java?

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

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What is a package in Java and what is its significance?

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What is the difference between checked and unchecked exceptions in Java?

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What is the purpose of the 'static' keyword in Java?

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Principle Interview Questions For Experienced

What is the purpose of the 'strictfp' keyword in Java?

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What is the role of the 'default' keyword in Java interfaces?

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What is the difference between method hiding and method overriding?

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Explain the concept of marker interfaces in Java and provide examples.

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What is the purpose of the 'this()' constructor in Java?

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How can you prevent a class from being inherited in Java?

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

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What are the different types of interfaces in Java?

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What is the purpose of the 'final' keyword in Java classes, methods, and variables?

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How can you prevent a class from being inherited in Java?

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Explain the concept of method references in Java 8.

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

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What is the purpose of the 'break' statement in Java?

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Explain the concept of method references in Java 8.

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What are the disadvantages of using inheritance in object-oriented programming?

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

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What is the purpose of the 'static' keyword in methods and variables?

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Explain the concept of functional interfaces in Java 8.

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What is the difference between composition and inheritance?

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What is the purpose of the 'instanceof' operator in Java?

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

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What is the purpose of the 'break' statement in Java?

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What are the disadvantages of using inheritance in object-oriented programming?

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

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What is the purpose of the 'static' keyword in methods and variables?

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Explain the concept of functional interfaces in Java 8.

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What is the difference between composition and inheritance?

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What is the purpose of the 'instanceof' operator in Java?

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What is the role of the 'default' keyword in Java interfaces?

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What is the difference between method hiding and method overriding?

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Explain the concept of marker interfaces in Java and provide examples.

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What is the purpose of the 'this()' constructor in Java?

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Principle Interview Questions

Principle Interview Questions For Freshers

Explain the concept of garbage collection in Java.

What is the purpose of the 'final' keyword in Java?

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

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

What is the difference between method overriding and method hiding?

How can you achieve multiple inheritances in Java?

What is the use of 'super' keyword in Java? Provide an example.

What is the purpose of interfaces in Java? How are they different from classes?

What are the advantages of using object-oriented programming over procedural programming?

What is the difference between method overloading and method overriding?

What is a constructor and why is it used in Java?

What is the difference between instance and static variables in Java?

What is the difference between a class and an object?

What are access modifiers in Java? Discuss their different levels of visibility.

Explain the concept of abstraction in object-oriented programming.

What is polymorphism and how is it implemented in object-oriented programming?

What is inheritance and why is it used in object-oriented programming?

How are classes and objects related in object-oriented programming?

What is the purpose of encapsulation in object-oriented programming?

Principle Intermediate Interview Questions

Explain the concept of anonymous classes in Java.

What is the difference between static and non-static methods in Java?

What is the use of 'throws' keyword in Java? Provide an example.

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

What are the different types of nested interfaces in Java?

What is the purpose of the 'super()' constructor in Java?

What is the difference between static and non-static variables in Java?

What is the use of 'throw' keyword in Java? Provide an example.

Explain the concept of inner classes in Java and their different types.

What is the difference between abstract class and interface?

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

What is the purpose of the 'volatile' keyword in Java?

Explain the concept of method hiding with an example.

What is the difference between static and non-static methods in Java?

What is the use of 'throws' keyword in Java? Provide an example.

Explain the concept of method overloading with an example.

What are the different types of polymorphism in Java?

What is the difference between abstract classes and interfaces?

Explain the four fundamental principles of object-oriented programming.

What are the different types of inheritance in Java?

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

Explain the concept of anonymous classes in Java.

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

What are the different types of nested interfaces in Java?

What is the purpose of the 'super()' constructor in Java?

What is the difference between static and non-static variables in Java?

What is the use of 'throw' keyword in Java? Provide an example.

Explain the concept of inner classes in Java and their different types.

What is the difference between abstract class and interface?

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

What is the purpose of the 'volatile' keyword in Java?

What is method hiding and when is it used?

What is the difference between shallow copy and deep copy?

What is the purpose of the 'abstract' keyword in Java?

What is the difference between final, finally, and finalize in Java?

What are the different types of access modifiers in Java?

Explain the concept of method overriding with an example.

What is the purpose of exception handling in Java?

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

What is a package in Java and what is its significance?

What is the difference between checked and unchecked exceptions in Java?

What is the purpose of the 'static' keyword in Java?

Principle Interview Questions For Experienced

What is the purpose of the 'strictfp' keyword in Java?

What is the role of the 'default' keyword in Java interfaces?

What is the difference between method hiding and method overriding?

Explain the concept of marker interfaces in Java and provide examples.

What is the purpose of the 'this()' constructor in Java?

How can you prevent a class from being inherited in Java?

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

What are the different types of interfaces in Java?

What is the purpose of the 'final' keyword in Java classes, methods, and variables?

How can you prevent a class from being inherited in Java?

Explain the concept of method references in Java 8.

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