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?

1032

How do you sort in java?

977

Does java list allow null?

984

Is arraylist a class in java?

1062

Can list contain null in java?

1084

Can list have duplicates in java?

906

How to retrieve data from database in java using arraylist?

1054

Is vector thread safe in java?

1049

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

1002

Can arraylist hold different types java?

978

Is arraylist ordered in java?

1112

Can java hashmap have duplicate keys?

1026

How is java hashmap implemented?

1024

Can you have two constructors in java?

976

How do you declare an array in java?

1054

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Un-Answered Questions { Core Java }

Can we override singleton class?

981

Why webdriver is an interface?

1051

Why is sizeof not a function?

997

Is set sorted in java?

929

Does collectionutils isempty check for null?

1414

What is javac in java?

1002

Do we need to manually write Copy Constructor?

1029

What is java util list?

955

explain copyonwritearraylist and when do we use copyonwritearraylist?

942

Can you make a constructor final in Java?

1129

What are the 4 versions of java?

1161

What is defined as false sharing in the context of multithreading?

1041

What does localhost mean?

941

What is an interoperable application in java ?

995

How do you sort arraylist in descending order?

1018

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