Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

How do you make an arraylist empty in java?

943

How does remove work in java?

993

Can java list contain duplicates?

1034

Can we declare array without size in java?

1047

How do you remove duplicates from an array in java?

979

Is array size fixed in java?

992

How do you remove an object from an arraylist in java?

990

Is arraylist dynamic in java?

1010

How does system arraycopy work in java?

1147

Does treeset allow null in java?

975

Is array a class in java?

1001

Does java arraylist maintain insertion order?

1006

Can list be null in java?

1058

Can vector have duplicates in java?

967

Is integer immutable in java?

1013

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Un-Answered Questions { Core Java }

What is methods in java?

1021

Compare java and python.

1003

Is java free for businesses?

1089

describe method overloading

1044

What classes of exceptions may be thrown by a throw statement?

985

What is local declaration?

988

What is java reflection api?

1029

What does int [] mean in java?

1048

What is io stream in java?

1083

What is a constructor, constructor overloading in java?

1009

How do you avoid global variables?

1107

Is a boolean variable?

1025

What are the differences between forwarding () method and sendredirect() methods?

1128

What is a default constructor and also define copy contrucyor?

1131

What is a singleton in genetics?

1099

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