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Interview Questions and Answers for 'Gst global' - 2 question(s) found - Order By Newest

Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback)
  Q1. Explain Singleton Design Pattern ?Design
Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html

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

   Like         Discuss         Correct / Improve     java   design pattern   singleton   at&t   ebay  fidelity india  united healthcare india     Asked in 46 Companies      intermediate        frequent


Related Questions

 Difference between Static and Singleton Class ?
 What is the difference between these two approaches of creating singleton Class ?

//Double Checked Locking Code
public static Singleton createInstance() {
   if(singleton == null){
      synchronized(Singleton.class) {
         if(singleton == null) {
            singleton = new Singleton();
         }
      }
   }
   return singleton;
}

//Single checked locking code
public static Singleton createInstance() {
   synchronized(Singleton.class) {
      if(singleton == null) {
         singleton = new Singleton();
      }
   }
   return singleton;
}
 What is the difference between Singleton and Prototype Bean scope in Spring ?
 serialization and deserialization of singleton class
 How to avoid cloning, serialization in the singleton class ?
 When singleton can break and how to resolve it
 If you are given choice to either load object eagerly or lazily , which one would you use in case of singleton pattern ?
  When should we use prototype scope and singleton scope for beans ?
  Shouldn't we make a class with all static members is its just expected to be executed as a standalone program with just one thread. Moreover Lets assume that there is no runtime Polymorphism required and there is no need for serialization ?


 Q2. What is a class and object ?

or

How would you explain a fresher the concept of class and object in simple terms ?
Core Java
Ans. Class is a template using which objects are created in memory. It's kind of a mold using which objects with body / state are made.


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

   Like         Discuss         Correct / Improve     class  object  class vs object     Asked in 4 Companies      basic        frequent


Related Questions

  Difference between == and .equals() ?
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or

What is the difference between String , StringBuilder and StringBuffer ?
  Why Char array is preferred over String for storing password?
  What are different ways to create String Object? Explain.
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