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 array and arraylist in java?

1109

Can a hashset contain duplicates java?

980

Which collection is thread safe in java?

992

Which collection is best for sorting in java?

1126

What is the maximum size of arraylist in java?

1010

What is the size of arraylist in java?

1028

What is use of arraylist in java?

1179

Which java collection does not allow null?

1150

What is listnode in java?

992

Which collection does not allow duplicates in java?

980

What is arraylist e in java?

1060

What is difference between arraylist and list in java?

1090

Is null or empty java?

988

What is thread synchronization in java?

896

Which is the class in java?

1054

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Un-Answered Questions { Core Java }

What is stack explain?

999

What is the covariant return type?

1100

How to optimize the javac output?

1023

Explain about object oriented programming and its features?

1013

Explain about the select method with an example?

1181

What is the full form of jpeg?

964

Explain java coding standards for interfaces?

1112

How does predicate work in java?

992

What is the difference between member variables initialization and assignment in a constructor?

1277

What are abstract classes and anonymous classes?

1075

What is a flag variable?

974

What are the types of relation?

1045

What is implicit object in java?

1082

What are the different types of java?

1067

What is the concept of multithreading?

991

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