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?

1535

Describe how to implement singleton design pattern in struts.

1007

What is a treeset class?

1012

Can you explain the meaning of aggregation and composition

1011

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

1058

What is garbage collector?

1083

Can we force the garbage collection to run?

952

why doesn't java run on all platforms?

1032

Can you tell me range of byte?

992

Explain the use of javap tool.

1140

Difference between arraylist and vector.

1131

What is the difference between multiple processes and multiple threads?

1213

Explain the difference between abstraction and encapsulation.

982

What do you understand by synchronization?

1052

Define locale.

1040

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Un-Answered Questions { Core Java }

What is a generic type?

1011

Is null function in java?

1052

What is numeric data type?

990

What is the difference between length and size in java?

992

Why is sizeof not a function?

1002

What is the use of inner class?

1046

What is difference between Heap and Stack Memory?

1054

What is the purpose of an interface?

1045

What is a marker interface?

1165

What is parsing and its types?

1114

Why chararray() is preferred over string to store the password?

1028

If you do not want your class to be inherited by any other class. What would you do?

1007

Explain the features of java?

1016

What is the effect of keeping a constructor private?

951

What is java console application?

1015

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