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Interview Questions and Answers for 'Bebo technologies' - 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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Systems  Onmobile Global  Trianz  Sasken  WNS Global Services  Tavant technology  Edz Infomatics      basic        frequent
Try 6 Question(s) Test

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?

Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc )
  Q2. What is Dependency Injection or IOC ( Inversion of Control ) ?Design

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.

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

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Related Questions
  Name few Dependency Injection frameworks ?
 What are the benefits of Dependency Injection or IOC ?
 What are different types of dependency injections ?
  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 ?
 Which of the OOP's features facilitate dependency injection ?


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