Class Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Topic :: Class

Class Interview Questions

Questions Answers Views Company eMail

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

2 12621

difference between sql exception class and sql warning class

1 6291

what is the base class of .net?

7 13334

why can't we declare data member of class auto register or extern

1 5629

how many types of classes are ther,what are that

L&T,

7 13088

i had specified the access specifier for abstarct class member like (pure virtual function) as private.But it can be accessed by the derived class.How the private member of one class is accessed by other class.if any body face this problem and found the solution plz reply to me.

Syntel,

1 4834

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 7659

How to make class immutable

6 10181

Wats the difference between package and devolopment class??

Bosch, IBM,

3 17812

Equivalence testing divides the input domain into classes of data from which test cases can be derived to reduce the total number of test cases that must be developed. is it.explain equivalence testing

1 6669

what is diffrence between debug class and trace class in asp.net ?

2 6105

Random order tests are conducted to exercise different class instance life histories. is it true

1 3761

Multiple class testing is too complex to be tested using random test cases. is it

3i Infotech,

1 7246

Testing OO class operations is made more difficult by Option 1 Encapsulation Option 2 Inheritance Option 3 Polymorphism Option 4 Both Inheritance and Polymorphism

Infosys,

2 14046

Can we inherit the constructor in a Class?please give one example.

iGate,

9 19680