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 to find the index of the largest number in an arraylist java?

1053

How do you sort in java?

1007

Does java list allow null?

1007

Is arraylist a class in java?

1087

Can list contain null in java?

1097

Can list have duplicates in java?

915

How to retrieve data from database in java using arraylist?

1069

Is vector thread safe in java?

1071

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

1026

Can arraylist hold different types java?

997

Is arraylist ordered in java?

1129

Can java hashmap have duplicate keys?

1045

How is java hashmap implemented?

1047

Can you have two constructors in java?

1006

How do you declare an array in java?

1088

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Un-Answered Questions { Core Java }

What is the difference between a synchronized method and a synchronized block?

1085

What is preparedstatement in java?

1069

Can we change the scope of the overridden method in the subclass?

1409

Explain with example the concept of constant variable in java.

1211

How hashmap works in java?

1063

What is an object in java and how is it created?

1072

When do we use hashset over treeset?

1076

give an example for encapsulation?

1064

What is a null class?

997

What is a map? What are the implementations of map?

1114

How list contains works in java?

999

Can we store variables in local blocks?

1367

please send me hr interview questions in it industry

2137

what do you mean by marker interface in java?

1004

Are floats faster than doubles?

1089

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