| Other Core Java Interview Questions |
| |
| Question | Asked @ | Answers |
| |
| While opening the file, what type of exceptions can be
caught? | | 3 |
| What is the differnence between String Buffer and String
builder despite having knowledge that String builder is
faster than String Buffer and last one is threadsafe.please
tell another important difference. | | 3 |
| jdbc drivers? | Wipro | 7 |
| what is private constructor?what are the uses of writing
private constructor in our program? | | 5 |
| what are the purposes of native, transiant key words? | | 2 |
| can we add two numbers without using arthematic operators?
if possible how? | | 2 |
| what is struts-config-xml?and its use? | | 3 |
| 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 | 3 |
| How to print nodes of a Binary tree? | TCS | 1 |
| What is casting? | | 3 |
| what is java bean?where can we use it? | TCS | 3 |
| what is Thread? | | 6 |
| What is difference between hash mapping and hash table? | NDS | 3 |
| what is overloading in java? | DNS | 4 |
| How are commas used in the initialization and iteration
parts of a for statement? | | 2 |
| Can u write constructor in abstract.If yes den when it will
be invoked. | SunGard | 3 |
| What is the purpose of the File class? | | 2 |
| What is the use of an interface? | | 3 |
| write a progam hashmap & hashtable? | IBM | 2 |
| what is jms? features of jms | CTS | 1 |
| |
| For more Core Java Interview Questions Click Here |
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