Core Java Interview Questions
Questions Answers Views Company eMail

which one is more efficient int x; 1. if(x==null) 2.if(null==x) state which one either 1 or 2?

HP, SparkTG,

6 9239

how tha garbage collector know that the object will be deleted? on which algorithm the garbage collector works? what is the working principle of garbage collector? How manay types of garbage collectors r there?

HP, SparkTG,

1 6351

what is object type casting? give some example with related?

HP, SparkTG,

2 7649

suppose we have an interface & that interface contains five methods. if a class implements that interface then we have to bound that to give tha definition of all five methods in that class. If we declare that class as abstract then can we call only two methods to give the deinition of that method & i don't want to give the definition of all the methods? can it possible

HP, Wipro,

6 8249

Why java is not a pure object oriented language?

IBM,

5 7198

why java is platform independent?

IBM, SparkTG,

5 6587

how to run servlet program between two computer through the internet ?

Kiran Prakashan, TCS,

2 5880

can you use the two main method in same class?how?

DELL, Geosoft, SparkTG,

4 9121

java program that takes a 3 digit number n and finds out whether the number 2^n + 1 is prime, or if it is not prime find out its factors.

HCL, Wipro,

7 8404

When we give defination of interface method in the class why method must be public???

2 3761

How many types of syncronization?

2 4191

What is race condition ?? (Threading concept) TCS 2 sept10

SparkTG, TCS,

3 6829

why we write public static void main (String args[]) in core java plz explain briefly??????????????????

HCL,

3 7250

diffrence b\w println() and printf()

NIIT,

8 20917

if we give input as " hi how are you" then the output should be "uoy woh"...it should skip odd words in the input and should reverse even words from the end of string...can anyone help me to write this program in java

1 3447


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Un-Answered Questions { Core Java }

How does queue work in java?

532


What is an immutable object? How do you create one in java?

602


What is deserialization?

586


What's the difference between an abstract class and interface in java?

559


Differentiate between == and equals().

598






What are the advantages of java over C++?

719


When should I use a singleton?

561


What is == and === in javascript?

560


What is difference between iterator access and index access?

648


What are voids?

533


Is alive in java?

507


What is a finally block?

568


Can we create object of static class?

528


How do you convert string to int in java?

562


How do you remove all elements from an arraylist in java?

508