Core java - Interview Questions and Answers for 'Netflix' | Search Java Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com
Share

Search Interview Questions


 2778 questions in repository.
 There are more than 200 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



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

 Q1. Difference between Static and Singleton Class ?Core Java2016-11-30 21:00:43

Ans. 1. Static class is a class which cannot be instantiated and all its members are static whereas Singleton is the class that only permit creation of single object and then the object is reused.

2. As there is no object in Static class, it cannot participate in runtime Polymorphism.

3. As Static class doesnt allow creating objects and hence it cannot be serialized.

4. Static class body is initialized eagerly at application load time whereas Singleton object can be initiated eagerly using static blocks or lazily on first need.

5. Its not recommended to use pure static class as it fails to use many OOPs concepts.

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

   Like      Discuss      Correct / Improve     Static Class  Singleton  Static Class vs Singleton     Netflix  EPAM  Ebay      Intermediate        frequent


Related Questions

 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;
}
  When should we use prototype scope and singleton scope for beans ?
  Explain Singleton Design Pattern ?
  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 ?
  Should we have instance variables in the Spring Bean which has been scoped as Singleton ?
  What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?
  Action Class is singleton and hence not thread safe in ..
  Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ?
 Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?

a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory


Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)
  Q2. Describe, in general, how java's garbage collector works ?Core Java
Anonymous
Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.

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


   Like      Discuss      Correct / Improve     java   garbage collection   java memory management   advanced     LinkedIn  Infosys  Google  Netflix  Amazon  Huawei Technologies  JP Morgan  enGenius  CitiusTech  Goldman Sachs  Bank Of America India  Salesforce  Addteq  Criteo  Capgemini  Horizon Solutions  Way dot com  Mphasis  TrueCaller  Intel  Symantec      intermediate        frequent

Try 4 Question(s) Test


Related Questions

  Does garbage collection guarantee that a program will not run out of memory?
  Why Char array is preferred over String for storing password?
 Let's suppose we have an to destroy objects, Design a program to implement garbage collection ?
  What are strong, soft, weak and phantom references in Java ?
  Should we override finalize method ?
  Can we call the garbage collector explicitly ?
  What does String intern() method do?
 Java doesn't provide exclusive access to memory like C/C++ and other lower level languages ? What are the advantanges and disadvantages ?
  What is a finalize method ?


 Q3. What does String intern() method do?Core Java
Admin
info@buggybread.com
Ans. intern() method keeps the string in an internal cache that is usually not garbage collected.

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

   Like      Discuss      Correct / Improve     java   string class   string   intern method   garbage collection   advanced     Polaris  Netflix      expert


Related Questions

  Does garbage collection guarantee that a program will not run out of memory?
  Why Char array is preferred over String for storing password?
  Describe, in general, how java's garbage collector works ?
 Let's suppose we have an to destroy objects, Design a program to implement garbage collection ?
  What are strong, soft, weak and phantom references in Java ?
  Should we override finalize method ?
  Can we call the garbage collector explicitly ?
 Java doesn't provide exclusive access to memory like C/C++ and other lower level languages ? What are the advantanges and disadvantages ?
  What is a finalize method ?




Subscribe to Java News and Posts. Get latest updates and posts on Java from Buggybread.com
Enter your email address:
Delivered by FeedBurner



comments powered by Disqus
 

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked:
         

X Close this

X Close this

Help Us Improve.
Please share your
interview experience.

Company Name:   


Questions Asked: