Design - Interview Questions and Answers for 'Zapcom' | Search Interview Question

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

Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc )

Q1. What is Dependency Injection or IOC ( Inversion of Control ) ?

Ans. It is a Design Pattern that facilitates loose coupling by sending the dependency information ( object references of dependent object ) while building the state of the object. Objects are designed in a manner where they receive instances of the objects from other pieces of code, instead of constructing them internally and hence provide better flexibility.

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_{Like Discuss Correct / Improve design patterns ioc ( Inversion of Control ) dependency injection Asked in 83 Companies intermediate frequent}

Related Questions

What are the benefits of Dependency Injection or IOC ?

What are different types of dependency injections ?

Name few Dependency Injection frameworks ?

Why do we need polymorphism in Java ?

What are the various Auto Wiring types in Spring ?

What is the difference betweeen @Inject and @Autowired ?

Which of the following Java features facilitates Dependency Injection - Inheritance or Composition ?

What are the different ways in which dependency injection can be done using Spring Framework ?

Difference between constructor and setter injection ?

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 face to face interviews.

Q3. Write a program to print fibonacci series.

Core Java

Ans. int count = 15;
int[] fibonacci = new int[count];
fibonacci[0] = 0;
fibonacci[1] = 1;
for(int x=2; x < count; x++){
fibonacci[x] = fibonacci[x-1] + fibonacci[x-2];
}

for(int x=0; x< count; x++){
System.out.print(fibonacci[x] + " ");
}

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_{Like Discuss Correct / Improve ebay fibonacci series Asked in 66 Companies basic frequent}

Related Questions

What are the steps to be performed while coding Junit with Mocking framework ?

What is a Sequence File?

What different level of logging you use while coding ?

Have you ever encoded the response before sending it back from the service? If Yes , Which encoding was used ?

What are the different type of encoding you have used ?

How does encoding affect using Reader / writer classes or Stream classes in Java ?

What is the difference between html encoding and url encoding ?

Does spaces get's encoded in html encoding ?

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