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 7257

Name the immediate superclass of the MenuComponent class?

1 4833

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

1 4776

Which containers may have a MenuBar?

1 5505

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

3 7168

Which containers use a FlowLayout as their default layout?

3 8334

Which java.util classes and interfaces support event handling?

2 12558

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

3 10831

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

2 5187

Name the package that always imported by default?

4 13276

Who developed JScript language?

3 6688

Is Java is 100% pure OOPS? Explain?

ANZ,

27 41597

Why are the methods of the Math class are static?

1 8830

Does Java support multiple Inheritance?

12 21943

What are null interfaces? Give some examples?

2 8049

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Un-Answered Questions { Core Java }

Given a singly linked list, find the middle of the list in a single traversal without using temporary variable.

1052

What do you mean by garbage collection used in java?

1069

Is char * a string?

995

What is __ init __ functions?

1128

What is string manipulation?

1009

What is better - 'bit-shift a value' or 'multiply by 2'?

1192

Write a program to calculate factorial in java?

1009

What exceptions occur during serialization?

1088

What is the program compilation process?

1117

explain the concept of virtual method invocation in polymorphism in detail?

2223

What is array length?

978

What is the multi-catch block in java?

1042

What is a parameter example?

982

Explain the private protected method modifier?

990

Is java free for commercial?

923

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