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 collections are thread safe in java?

925

Which data type is class in java?

1016

Why are arrays useful in java?

1030

What is a dynamic array in java?

1179

What is maximum size of arraylist in java?

1031

Which collection is sorted in java?

1034

What is entry set in java?

1141

What is difference between array and arraylist in java?

990

What is hash table in java?

1020

What is the maximum size of byte array in java?

1011

What is hash in java?

974

What is sortedmap in java?

1031

What is natural ordering in java?

961

What is initial size of arraylist in java?

1057

What is getkey () in java?

1010

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Un-Answered Questions { Core Java }

What is a memory leak in java?

1074

What checkbox method allows you to tell if a checkbox is checked?

1011

how to open and edit XML file in Weblogic???

1972

Explain garbage collection in java?

982

What is variable and its types?

1016

What are class members by default?

1081

What is method overloading with type promotion?

1273

What is the use of inner class?

1046

What is parsing and its types?

1109

Difference between == and .equals() ?

1001

How objects are stored in java?

1033

Is set thread safe java?

924

Explain the difference between abstraction and encapsulation.

979

What is the SimpleTimeZone class?

2277

Explain about varargs in java?

1130

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