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 the ResourceBundle?

Elementus Technologies,

2 6831

Hey buddy.. can you please tell me about the use of marker interface? And is there any link between marker interface and factory methods? Thanks in advance.

2 6434

Hi, well i am unable to understand that why it is mandatory to have same hashcode, if two objects are same? Thanks in advance.

5 7264

Hi buddy, well i got that there is always a default constructor with abstract class. OK. But why not with interface? Thanks in advance.

2 5174

hi to all. well can you please tell me that why String class is immutable? Thanks in advance.

Huawei,

5 9825

1).Is Object class abstract or not? 2).Is main method(public static void main(String args[])low priority thread or high priority thread?

TCS,

3 10309

1).what is the difference between below examples String s="vijay"; String s=new String("vijay");

Mascon, Satyam, TCS,

12 19523

what are the different access specifiers that can be used by interfaces and abstract classes? can anyone give me detailed description on this

IBM, L&T,

11 25033

How will you create the class for the following scenario? Employees under one employee?

Bally Technologies,

2 6603

Can we override static methods?

Bally Technologies,

18 30786

Difference between flush() and commit() in hibernate?

Bally Technologies,

2 22309

what is generics in jdk1.5?

Bally Technologies,

2 10279

Write the code for Palindrome ?

Bally Technologies,

2 6428

Linked List reverese program

Bally Technologies,

2 6347

Is ResultSet class?

Bally Technologies, TCS,

5 11796

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Un-Answered Questions { Core Java }

What does isempty () do in java?

1064

what are the disadvantages of indexes in oracle?

2559

What is difference between synchronize and concurrent collection in java?

1076

Is array serializable java?

990

Is null a string in java?

1081

Does windows 10 need java?

1052

What is a website container?

956

Differentiate between static and non-static methods in java.

1056

What is reverse function?

1140

What classes of exceptions may be caught by a catch clause in java programming?

1181

What are the super most classes for all the streams?

2563

Is it possible to compare various strings with the help of == operator?

995

What are accessor methods in java?

1016

What are the 5 types of research methods?

1141

What is empty list in java?

1081

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