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Core Java Interview Questions
Questions Answers Views Company eMail

Hi Anyone know the model / questions of the Federal bank sample questions for the post of Specialist Officers - Programmers. Please post if anyone have..

1434

How to make a class immutable?

Bosch, TSYS,

15 22875

What is the difference between Abstract Class and Interface

Amdocs,

8 11438

How to perform Singleton of the java class object on multi JVM?

2 10294

How to send a request to garbage collector?

4 5798

How can you say HashMap is syncronized?

Arete, IBM,

14 12884

which pattern is default in scanner package?

Satyam,

1416

what is d difference between deep cloning and shallow cloning in core java?

Satyam,

3 15241

what is the use of private constructor in core java?

OnMobile, Satyam, Yash Technologies,

3 17095

what is the use of datasource in core java?

Satyam,

3 7637

public class AboutStrings{ public static void main(String args[]){ String s1="hello"; String s2="hel"; String s3="lo"; String s4=s2+s3; //to know the hash codes of s1,s4. System.out.println(s1.hashCode()); System.out.println(s4.hashCode()); // these two s1 and s4 are having same hashcodes. if(s1==s4){ System.out.println("s1 and s4 are same."); }else System.out.println("s1 and s4 are not same."); } } Somebody told me that, == operator compares references of the objects. In the above example even though s1 and s4 are refering to same object(having same hash codes), it is printing s1 and s4 are not same. Can anybody explain in detail why it is behaving like this? Thanks in Advance RavuriVinod

TCS,

4 5085

if two references are having same hash codes,is that means those are refering to same object?

CTS,

5 7988

Difference String and String Buffer

4 4645

What is object

6 5590

How to make class immutable

6 6875


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Un-Answered Questions { Core Java }

What does 0 mean in boolean?

139


How many unicode characters are there?

135


What is an example of procedure?

125


When is finally block not called?

175


What are the topics in core java?

148






What is application tier?

119


what is predefined function in java?

147


What is the function of http?

133


What do you understand by the bean persistent property?

166


Why is the type for real numbers called double?

152


What is string intern in java?

143


What is equals method in java?

129


Can we override private method?

143


How many digits is int32?

148


How is a structure different from array ?

207