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

Search Interview Questions


 3193 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 'Final keyword' - 6 question(s) found - Order By Newest

 Q1. When we say final x = 10, is the reference final or the value ?Core Java2017-07-29 13:27:04

Ans. final keyword have meaning only to referenced and not the value. It means that the specified reference cannot be dereferenced. It doesn't control the value assigned to the memory that's being referenced. This is the reason that final object references doesn't mean that the object is immutable but means that the reference cannot be changed to point to new object.

In case of primitive types too, when we assign a reference to another, values are passed and not the object reference, and hence a new placeholder is created in memory with the same value. That is why final to that context means that you cannot change the assigned memory and there is no way we can have that memory place have another value.

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

   Like      Discuss      Correct / Improve     final keyword  final variables  references


 Q2. Can we add more elements to an array list that has been marked as final ?

Ans. Yes, the array list can hold more elements. Final only puts the restriction that the array list reference cannot hold any other array list.

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

   Like      Discuss      Correct / Improve     ebay   collections   arraylist   final keyword


 Q3. What is the use of final keyword ?Core Java2017-06-08 06:17:54

Ans. final keyword is a modifier that means differently when applied to variables, methods and classes.

1. Final variable cannot be changed once initialized
2. Final method cannot be overridden
3. Final class cannot be sub classed

  Sample Code for final variable

  Sample Code for final method

  Sample Code for final class

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

   Like      Discuss      Correct / Improve     final  final keyword     Trimax IT Infrastructure & Services      Basic        frequent


 Q4. How different is it when final applied to variables and object references ? Core Java2017-07-29 13:31:59

Ans. final when assigned to object references doesn't make them immutable. It means that the references cannot be de-referenced.

final when applied to variables means that the value cannot be changed.

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

   Like      Discuss      Correct / Improve     final keyword  final variable


 Q5. Why Java has final class ?Core Java2018-07-10 12:24:27

 This question was recently asked at 'Avis'.This question is still unanswered. Can you please provide an answer.


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

   Like      Discuss      Correct / Improve     final class   final keyword     Avis      basic


 Q6. Are final methods faster than regular instance methods ?Core Java2018-07-16 06:53:39

Ans. Yes. As they cannot be overridden , there is no use of virtual table concept which is used for dynamic binding resolution.

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

   Like      Discuss      Correct / Improve     final methods   final keyword      expert




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: