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

Basic and Very Frequently asked.
  Q1. What is Polymorphism in Java ?Core Java2016-11-06 09:10:54

Ans. Polymorphism means the condition of occurring in several different forms.

Polymorphism in Java is achieved in two manners

1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas

2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding.

  Sample Code for overloading

  Sample Code for overriding

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Try 2 Question(s) Test


Related Questions

  What are points to consider in terms of access modifier when we are overriding any method?
 If everything is an object , Cant we declare every object as

Object obj = new String();
  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 ?
  Is this Polymorphism ?

Map<String, List<String>> inventoryManagerCountMap = new HashMap<String, ArrayList<String>>();
  When are static and instance methods resolved ? During compile time or Runtime ?
  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
 How is static and dynamic polymorphism achieved in Java ?
 Why do we need polymorphism in Java ?


Frequently asked to fresh graduates.
  Q2. Difference between Process and Thread ?Operating System
Anonymous
Ans. Process is a program in execution whereas thread is a separate path of execution in a program.

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Related Questions

  What is the difference between time slicing and preemptive scheduling ?
  What is a Deadlock ?
  What are the difference between Threads and Processes ?
  Why threads block or enters to waiting state on I/O?
  What is the difference between yield() and sleep()?
  What is the initial state of a thread when it is created and started?
  What is suspend() method used for ?
  Difference between suspend() and stop() ?
  What is a daemon thread? Give an Example ?


  Q3. Difference between Array and ArrayList ?Core Java2016-12-15 14:13:12

Ans. <a href="http://javahungry.blogspot.com/2015/03/difference-between-array-and-arraylist-in-java-example.html" rel="nofollow">http://javahungry.blogspot.com/2015/03/difference-between-array-and-arraylist-in-java-example.html</a>

  Sample Code for ArrayList

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Related Questions

 If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ?
  What is the difference between ArrayList and LinkedList ?
  Why Char array is preferred over String for storing password?
 Which of the following is false about main method ?

a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method
  Difference between Vector and ArrayList ?
  What are the disadvantages of using arrays ?
  What are the Disadvantages of using Collection Classes over Arrays ?
  Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?
  Difference between ArrayList and LinkedList ?
  Which of the following exception is thrown when we try to access element which is beyond the size ?




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