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Interview Questions and Answers for 'Blue star infotech' - 2 question(s) found - Order By Newest

Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback )
  Q1. Difference between == and .equals() ?Core Java
Anonymous
Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory.

x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object.

Sample code:

String x = new String("str");
String y = new String("str");

System.out.println(x == y); // prints false
System.out.println(x.equals(y)); // prints true

  Sample Code for equals

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& Associates  eMeasurematics  NovelERP Solutions  Web Element Solutions  HDFC Bank  Qualcomm  Intellect Design Arena  Diebold Nixdorf  Sharekhan  Pepperfry  IRIS Business Services  Wind World  ZEDO  Loylty Rewardz Mngt  C2L Biz  Chenoa Information Services  Insolutions Global  Vakrangee Softwares  Celusion Technologies  Currencies Direct  Zenith System Solutions  Base Information Management  Exponentia DataLabs  Realty Redefined  Constaccent  Neoquant Solutions  Aureus Analytics  Planfirma Technologies  Pawaa Software  iBhejo  Fairfax County Virginia  American Conservation Experience  Hari Krishna Exports  Core Education & Technologies   Nishat Mills  Industrial Market Place  Krisnela Technologies  Swissclear Global  Samyak Software  Professional Access  Nexstep Infotech  Concerto Software  Viral Technologies  Silverwing Technologies  Gcom Software Inc  Accel Frontline  Atom Technologies  Blue Star Infotech  Cynapse  Datamatics Global Services  Flytxt Mobile Solutions  Persistent Systems  Onmobile Global  Trianz  Sasken  WNS Global Services  Tavant technology  Edz Infomatics      basic        frequent
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Related Questions
 What is the difference between = and == in Java ?
 How is == operator different for objects and primitive types ?
 What will be the output of following code

Integer x = 1;
Integer y = 2;
System.out.println(x == y);

What if you change 1 to "1" and Integer to String?

  Q2. What are the core OOPs concepts ?Core Java2017-02-06 16:15:55

Ans. Abstraction, Encapsulation, Polymorphism , Composition and Inheritance

 Help us improve. Please let us know the company, where you were asked this question :   

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Related Questions
  What are the difference between composition and inheritance in Java?
  What are points to consider in terms of access modifier when we are overriding any method?
  What is the difference between Encapsulation and Abstraction?
  Why every object constructor automatically call super() in Object before its own constructors?
 What is Polymorphism in Java ?
 Explain OOPs

or

Explain OOPs Principles

or

Explain OOPs Concepts

or

Explain OOPs features

or

Tell me something about OOPs
  Difference between Overloading and Overriding ?
  Difference between Composition and Inheritance ?
 Can you give a real world example of Encapsulation and Abstraction ?
  How compiler handles the exceptions in overriding ?


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