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

Core Java Interview Questions

Questions Answers Views Company eMail

Which class is the immediate superclass of the Container class?

1 7255

Name the immediate superclass of the MenuComponent class?

1 4829

To obtain design information about an object, which class in used?

1 4770

Which containers may have a MenuBar?

1 5499

In what type of containers, Border layout is a default layout?

3 7163

Which containers use a FlowLayout as their default layout?

3 8331

Which java.util classes and interfaces support event handling?

2 12543

To set the position and size of a component, which methods are used?

3 10824

What are the allowed, non-Unicode letter characters that can be used as the first character of an identifier?

2 5180

Name the package that always imported by default?

4 13266

Who developed JScript language?

3 6680

Is Java is 100% pure OOPS? Explain?

ANZ,

27 41536

Why are the methods of the Math class are static?

1 8824

Does Java support multiple Inheritance?

12 21916

What are null interfaces? Give some examples?

2 8045

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Un-Answered Questions { Core Java }

what is singleton class in java?

1054

Explain inner classes ?

1128

Is stringwriter thread safe?

996

State the main difference between c++ and java?

1088

Explain java coding standards for constants?

1014

What is main method?

1039

4.1 Supply contracts (in the form of comments specifying pre- and post conditions) for the enqueue() method of the LinkedQueue class given in the Appendix. (2) 4.2 Let Thing be a class which is capable of cloning objects, and consider the code fragment: Thing thing1 = new Thing(); //(1) Thing thing2 = thing1; //(2) Thing thing3 = (Thing) thing1.clone(); //(3) Explain how the objects thing2 and thing3 differ from each other after execution of the statements. (

1865

What is user defined exception in Java?

1080

What is the requirement of thread in java?

1052

How arrays are stored in memory in java?

978

What is the list interface in java programming?

1117

Can we use synchronized block for primitives?

1073

Where local and global variables are stored?

1082

How do you create immutable object in java?

1046

What is the method in java?

1101

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