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 6816

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 6432

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 7254

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 5165

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

Huawei,

5 9809

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 10308

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

Mascon, Satyam, TCS,

12 19507

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 25025

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

Bally Technologies,

2 6597

Can we override static methods?

Bally Technologies,

18 30766

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

Bally Technologies,

2 22305

what is generics in jdk1.5?

Bally Technologies,

2 10279

Write the code for Palindrome ?

Bally Technologies,

2 6421

Linked List reverese program

Bally Technologies,

2 6345

Is ResultSet class?

Bally Technologies, TCS,

5 11781

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Un-Answered Questions { Core Java }

What do you mean by mnemonics?

1051

What is a static class in java?

1012

How do you initialize an arraylist in java?

1042

What is diamond operator in java?

956

What is anonymous inner class?

1083

What do you mean Abstraction in java?

1088

Can a class be protected in java?

968

Where is the find and replace?

1005

What is a literal coding?

1026

Why string is called as immutable?

953

Is null function in java?

1042

What is static keyword?

1150

Why Set interface contains unique elements, what internally implemented for this so that it contains unique elements?

8109

What is runtime locatable code?

1427

How can you read content from file in java?

1004

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