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

Core Java Interview Questions

Questions Answers Views Company eMail

Can we declare variables inside a method as Final Variables?

3 12554

Can you call a constructor within a constructor?

7 15650

Can you declare a static variable in a method?

7 17226

How the elements are organized in GridLayout?

2 5125

How are this and super used?

IBM,

7 12294

How are this() and super() used with constructors?

9 19750

Without creating a new object, How you can retrieve a String or other object?

1 5286

How GUI component handle its own events?

1 5319

How you can create a radio buttion using Checkbox class?

1 4961

Can an unreachable object become reachable again?

DELL,

3 22390

Can applet in different page/s communicate with each other?

1 4626

How to add and remove nodes in Jtree?

1 3317

What is deadlock and how to avoid this?

2 6592

How to avoid the runtime exception ?

2 10175

How the elements are organized in BorderLayout?

5 8714

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Un-Answered Questions { Core Java }

Describe the various concepts related to object oriented programming (oop).

1028

How big is a 32 bit integer?

1040

What is java util collection?

1080

Why should I use abstract class?

1096

What is treeset and treemap in java?

1063

What is a constructor overloading in java?

1034

What is the difference between method overriding and overloading?

1227

Explain about collection interface in java?

988

What is an example of a constant variable?

1078

Can we use static class instead of singleton?

1050

What does those terms actually mean included in the j.d.k i.6?

2116

When a lot of changes are required in data, which one should be a preference to be used? String or stringbuffer?

1238

What is the difference between java applets and applications?

1151

What is string builder in java?

1009

What is difference between string and stringbuffer?

1092

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