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 6737

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 6337

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 7103

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 5061

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

Huawei,

5 9653

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 10186

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

Mascon, Satyam, TCS,

12 19166

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 24739

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

Bally Technologies,

2 6528

Can we override static methods?

Bally Technologies,

18 30279

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

Bally Technologies,

2 22188

what is generics in jdk1.5?

Bally Technologies,

2 10202

Write the code for Palindrome ?

Bally Technologies,

2 6334

Linked List reverese program

Bally Technologies,

2 6272

Is ResultSet class?

Bally Technologies, TCS,

5 11600

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Un-Answered Questions { Core Java }

What are the types of strings?

995

How a string is stored in memory?

973

What is the main functionality of the remote reference layer?

1963

what is thread? What are the high-level thread states? Or what are the states associated in the thread? : Java thread

953

Which types of exceptions are caught at compile time?

991

What is the name of the java compiler?

1016

What is a boolean flag in java?

973

What is off heap memory?

948

What is finally block?

993

How many ways can you break a singleton class in java?

931

What is a function in programming?

1002

difference between byte stream class and character stream class?

4499

Can arraylist contain null values?

972

What is a platform?

1011

What is meant by interface?

1027

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