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Design - Interview Questions and Answers for 'Amd' - 3 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 ) and Epam Systems
  Q1. Difference between == and .equals() ?Core Java
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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   Like         Discuss         Correct / Improve     java   string comparison   string   object class   ==    equals   object equality  operator   == vs equals   equals vs ==     Asked in 294 Companies      basic        frequent

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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?


Very frequently asked.Usually among first few questions.
  Q2. What is MVC ? Design
Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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   Like         Discuss         Correct / Improve     j2ee   mvc   mvc design pattern   design pattern   struts   spring   web application   web frameworks   ebay     Asked in 60 Companies      basic        frequent

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Related Questions

  Explain Flow of Spring MVC ?
  What are the benefits of using Spring Framework ?
  Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ?
  What bean scopes does Spring support? Explain them.
  Which MVC is struts2 based on ?
  What are different modules of spring ?
  What is Spring configuration file?
  Q: What is default scope of bean in Spring framework?
  What is bean auto wiring?


Very Frequently asked to Senior Software Engineers or Developers.
  Q3. Describe some of the Design Patterns you have used ?Design
Ans. [Open Ended Answer]

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   Like         Discuss         Correct / Improve     design patterns     Asked in 17 Companies      intermediate        frequent


Related Questions

 What is Dependency Injection or IOC ( Inversion of Control ) ?
  What is MVC ?
  What are the Wrapper classes available for primitive types ?
  Difference between Factory and Abstract Factory Design Pattern ?
  Difference between Factory and Builder Design Pattern ?
  Difference between Builder and Composite ?
  Difference between Factory and Strategy Design Pattern ?
 What is the difference between subject and observable ?
 What are the disadvantages of Design Patterns ?
  What Design pattern Wrapper Classes implement ?



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