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

  Q1. Explain OOPs Core Java2017-06-13 08:25:45

Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features

1. Inheritance for Code Reuse
2. Abstraction for modularity, maintenance and agility
3. Encapsulation for security and protected
4. Polymorphism for flexibility and interfacing

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Related Questions

 Can you give a real world example of Encapsulation and Abstraction ?
 Which of the following Java feature promotes access protection or Hiding ?

a. Inheritance
b. Encapsulation
c. Abstraction
d. Composition
 Define encapsulation in Java ?
 Give an example of how Object Oriented Programming Concepts can be implemented.
 Which of the OOP's features facilitate dependency injection ?
 Which of the OOP's feature - encapsulation or abstraction - is more important ?
 Which of the polymorphism type - static or runtime - is more important ?
 Which of the OOP's feature is most important ?


Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.
  Q2. Differences between abstract class and interface ?Core Java
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Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).

A class can extend single abstract class whereas it can implement multiple interfaces.

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Related Questions

 What are the different uses of Interfaces in Java ?
 Why can't we have diamond problem with interfaces ?
  What are Marker Interfaces ? Name few Java marker interfaces ?
  Why do we need Thread class even in case we execute thread using runnable interface ?
  Which of the following doesn't extend Collection interface ?
 If an Abstract class has only abstract methods, What's the difference between such a class and an interface ?
  What is an API ( Application Programming Interface ) ?
  Can we declare interface methods as private ?
  What is a nested interface ?


  Q3. Write a Program to check if 2 strings are Anagrams ?Core Java2016-11-30 20:52:37

Ans. public void checkIfAnagram(String str1,String str2){
boolean anagram = true;
for(char c:str1.toCharArray()){
if(!str2.contains(String.valueOf(c))){
System.out.println("Strings are Anagrams");
anagram = false;
}

if(anagram == true){
System.out.println("Strings are not Anagrams");
}
}
}

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Related Questions

  Difference between == and .equals() ?
  Why is String immutable in Java ?
  Explain the scenerios to choose between String , StringBuilder and StringBuffer ?

or

What is the difference between String , StringBuilder and StringBuffer ?
  What are the difference between composition and inheritance in Java?
  Does garbage collection guarantee that a program will not run out of memory?
  What are different ways to create String Object? Explain.
  What do you mean by "Java is a statically typed language" ?
  Why do we need Inner classes ? Cant we just work with outer classes wherever we implement Inner classes ?
  What are different ways of object creation in Java ?
  What are points to consider in terms of access modifier when we are overriding any method?




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