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?

1113

How do you sort in java?

1035

Does java list allow null?

1038

Is arraylist a class in java?

1124

Can list contain null in java?

1142

Can list have duplicates in java?

956

How to retrieve data from database in java using arraylist?

1103

Is vector thread safe in java?

1094

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

1071

Can arraylist hold different types java?

1036

Is arraylist ordered in java?

1167

Can java hashmap have duplicate keys?

1077

How is java hashmap implemented?

1075

Can you have two constructors in java?

1047

How do you declare an array in java?

1133

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Un-Answered Questions { Core Java }

What is the most important feature of java? What is an interface?

1054

What is anagram in java?

974

Can we have any code between try and catch blocks?

1027

What are jee technologies?

1058

Implementations of set interface?

1066

What is threaded programming and when is it used? : Java thread

1111

Why java strings are immutable in nature?

1126

Does windows 10 need java?

1100

How is java hashmap implemented?

1075

What are the skills required for core java?

1071

Can a abstract class be declared final?

1046

What is difference between final and immutable?

1211

What is the locale class in java programming?

1153

Is null a value?

1094

Is a case study a method or methodology?

949

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