Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

what is filters and its use?

Virtusa,

2 6136

what is request processor?

Virtusa,

1 5572

how to use this key word in java programming?

7 11026

what is the use of finalize()Method please explain with an example

3 11554

how to use finalize()Method to resources

TCS,

4 7040

What is Exception handling in Java How do you handle run time errors please explain with an example

Mastek, TCS,

2 7587

can you program for reverse string?

IBM,

7 12332

what is run time polymorphism

4 6842

what Data encapsulation in java?

5 10504

what is polymorphism?

4 8001

What is Servlet?

8 8125

can any one tell me what is advantage of encapsulation

2 5791

can any one tell me when do u go for inheritance and polymorphism

3 5441

How do u provide security in java

3 6604

what is the use of abstract class?

Amdocs, Atos Origin, Invictus,

3 7706

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Un-Answered Questions { Core Java }

What do you mean by constant time complexity?

1250

How can an exception be thrown manually by a programmer?

1003

Can a singleton class be inherited?

973

Why can't we make a class private in java?

1039

Are there structures in java?

970

Why javac is not recognized?

943

What are the different types of collections in java?

962

How do you clear a method in java?

1007

What is the default access specifier for variables and methods of a class?

1205

Is singleton a bad practice?

1047

How do you convert bytes to character in java?

1001

What does singleton mean in java?

997

What is flush buffer?

1050

Why string is immutable or final in java

1088

Why is the type for real numbers called double?

960

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