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Interview Questions and Answers for 'AdNovum' - 3 question(s) found - Order By Newest

Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant
  Q1. What is an Immutable Object ?Core Java
Ans. Object that can't be changed after instantiation.

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   Like         Discuss         Correct / Improve     java   oops   immutable  immutability     Asked in 27 Companies      basic        frequent

Try 2 Question(s) Test


Related Questions

  Why is String immutable in Java ?
  Why Char array is preferred over String for storing password?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
 How is string object immutable if we can concat a string to it ?
  How to implement an immutable class ?
  What is an immutable class ?
  Does Declaring an object "final" makes it immutable ?
 Is String final in Java ?
  What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?


Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback)
  Q2. Explain Singleton Design Pattern ?Design
Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html

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   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 Singleton and Prototype Bean scope in Spring ?
 serialization and deserialization of 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 are design situations to use Singleton and Prototype Design Pattern ?
 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 ?


Frequently asked in Accenture.
  Q3. What is your biggest achievement at work ?General
Ans. [Open Ended Answer]

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   Like         Discuss         Correct / Improve     general question  non technical question     Asked in 20 Companies        frequent


Related Questions

  Describe, in general, how java's garbage collector works ?
  What is a ConcurrentHashMap ?
  What is Generalization and Specialization in terms of casting ?
 Which java frameworks have you used ?
  What the Bean scopes provided by Spring ?
  What are the various Auto Wiring types in Spring ?
  When should we use prototype scope and singleton scope for beans ?
 When do we generally get this database error - integrity constraint violated - parent key not found ?
 Write a program for Coin Changer application ?
 When do we generally get the database error - Unique Constraint Violated ?



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