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?

1161

Can a hashset contain duplicates java?

1021

Which collection is thread safe in java?

1035

Which collection is best for sorting in java?

1168

What is the maximum size of arraylist in java?

1060

What is the size of arraylist in java?

1066

What is use of arraylist in java?

1238

Which java collection does not allow null?

1207

What is listnode in java?

1033

Which collection does not allow duplicates in java?

1026

What is arraylist e in java?

1104

What is difference between arraylist and list in java?

1130

Is null or empty java?

1029

What is thread synchronization in java?

950

Which is the class in java?

1116

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Un-Answered Questions { Core Java }

What are the advantages of defining packages in java?

1035

What is an i/o filter?

1957

Objects or references which of them gets garbage collected?

1010

Is linkedlist thread safe in java?

1033

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

1110

What is the type of lambda expression?

1082

Where local and global variables are stored?

1126

What is regex in java?

990

What is the difference between char and char *?

1144

What is string [] args?

1056

How does the garbage collector works in java?

1142

Will the jvm load the package twice at runtime?

1147

What is struts in java?

1090

When can an object reference be cast to an interface reference in java programming?

1064

When should you make a function static?

1029

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