Core java - Interview Questions and Answers for 'Commvault' | Search Java Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com
Share

Search Interview Questions


 3007 questions in repository.
 There are more than 200 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



Core java - Interview Questions and Answers for 'Commvault' - 2 question(s) found - Order By Newest

Frequently asked to fresh graduates and less experienced developers. Among the first few questions in many interviews.
  Q1. What are the difference between composition and inheritance in Java?Core Java
Admin
info@buggybread.com
Ans. Composition - has-a relationship between objects.
Inheritance - is-a relationship between classes.

Composition - Composing object holds a reference to composed objects and hence relationship is loosely bound.
Inheritance - Derived object carries the base class definition in itself and hence its tightly bound.

Composition - Used in Dependency Injection
Inheritance - Used in Runtime Polymorphism

Composition - Single class objects can be composed within multiple classes.
Inheritance - Single class can only inherit 1 Class.

Composition - Its the relationship between objects.
Inheritance - Its the relationship between classes.

  Sample Code for inheritance

  Sample Code for composition

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


   Like      Discuss      Correct / Improve     java   java concepts   inheritance   composition   inheritance vs composition     HCL Technologies  Tata Consultancy (TCS)  Infosys  Amazon  Source Intelligence  News UK  Starmount  MapQuest  SalesForce  Expedia  Deegit  JP Morgan  Canva  Todle  Yodle  Berkley Net  Help Scout  Partners HealthCare  Doximity  Commvault  Heroku  Starmount  Help.com  healthcare system  TU Kaiserslautern  Epam      basic        frequent
Try 5 Question(s) Test

Related Questions
  Difference between Composition and Inheritance ?
 Which of the following Java feature promotes access protection or Hiding ?

a. Inheritance
b. Encapsulation
c. Abstraction
d. Composition
  Which of the following is tightly bound ? Inheritance or Composition ?
  Can we compose the Parent Class object like this ?
 Which of the following Java features facilitates Dependency Injection - Inheritance or Composition ?
 How are the concept of Association related to Composition and Inheritance ?
 Is dependency injection possible if we don't have inheritance / Composition ?
 What is composition ?
 Does use of Final class enforces composition over Inheritance in Java ?

  Q2. Which are the different segments of memory ?Core Java
Anonymous
Ans. 1. Stack Segment - Contains primitives, Class / Interface names and references.

2. Heap Segment - Contains all created objects in runtime, objects only plus their object attributes (instance variables), Static variables are also stored in heap.

3. Code Segment - The segment where the actual compiled Java bytecodes resides when loaded

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

   Like      Discuss      Correct / Improve     java   memory   memory management   stack memory   heap memory   code segment memory   advanced     NX Developer  Velocity  Commvault  eBizprise Taiwan  Tata Consultancy (TCS)  Nakisa  HCL Technologies  Blue Coat  Symantec      expert        frequent
Try 6 Question(s) Test

Related Questions
  Does garbage collection guarantee that a program will not run out of memory?
  What are different ways to create String Object? Explain.
  Describe what happens when an object is created in Java ?
  Describe, in general, how java's garbage collector works ?
  What are various types of Class loaders used by JVM ?
  What are strong, soft, weak and phantom references in Java ?
 What will happen if we don't have termination statement in recursion ?
 Why two types of memory - stack and heap are required by Java ?
  Different types of memory used by JVM ?
  What is a class loader ? What are the different class loaders used by JVM ?


Subscribe to Java News and Posts. Get latest updates and posts on Java from Buggybread.com
Enter your email address:
Delivered by FeedBurner


comments powered by Disqus
 

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked:
         

X Close this

X Close this

Help Us Improve.
Please share your
interview experience.

Company Name:   


Questions Asked: