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 difference between add() and addelement() in vector?

1591

Describe how to implement singleton design pattern in struts.

1074

What is a treeset class?

1067

Can you explain the meaning of aggregation and composition

1073

What are the actions that can occur when a thread enters blocked state?

1119

What is garbage collector?

1139

Can we force the garbage collection to run?

1005

why doesn't java run on all platforms?

1077

Can you tell me range of byte?

1062

Explain the use of javap tool.

1190

Difference between arraylist and vector.

1187

What is the difference between multiple processes and multiple threads?

1299

Explain the difference between abstraction and encapsulation.

1035

What do you understand by synchronization?

1101

Define locale.

1100

Post New Core Java Questions

Un-Answered Questions { Core Java }

Why are global variables used?

1083

How to invoke external process in java.

1138

What is difference between string and stringbuffer?

1207

What are the super most classes for all the streams?

2715

Why should we use singleton pattern instead of static class?

981

what is nested class in java?

1228

What is maximum size of arraylist in java?

1099

Differences between external iteration and internal iteration?

1216

What are the skills required for core java?

1078

Why do we need array in java?

1061

Is map sorted in java?

1117

why java uses class level type casting ?

2707

What is Hierarchy of exception?

1150

List any five features of java?

1077

Can a private method of a superclass be declared within a subclass?

1110

For More Un-Answered { Core Java } Questions Click Here