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

Search Interview Questions


 3335 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

   



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

Very frequently asked in different variations. Frequently asked in Deloitte ( 2 feedback ) , HCL Tech ( 3 feedback ) and Coginizant (CTS)
  Q1. Explain the scenerios to choose between String , StringBuilder and StringBuffer ?

or

What is the difference between String , StringBuilder and StringBuffer ?
Core Java
Anonymous
Ans. If the Object value will not change, use String Class because a String object is immutable.

If the Object value can change and will only be modified from a single thread, use StringBuilder because StringBuilder is unsynchronized(means faster).

If the Object value may change, and can be modified by multiple threads, use a StringBuffer because StringBuffer is thread safe(synchronized).

  Sample Code for String

  Sample Code for StringBuffer

  Sample Code for StringBuilder

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


   Like         Discuss         Correct / Improve     java   string class   string   stringbuilder   stringbuffer     Asked in 27 Companies      basic        frequent

Try 3 Question(s) Test


Related Questions

  Difference between == and .equals() ?
  Why is String immutable in Java ?
  What are different ways to create String Object? Explain.
  Why Char array is preferred over String for storing password?
  What is a String Pool ?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
 How is string object immutable if we can concat a string to it ?
  What is StringJoiner ?
 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


Frequently asked question for intermediate developers.
  Q2. What is Volatile keyword used for ?Core Java
Anonymous
Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached.

  Sample Code for volatile

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

   Like         Discuss         Correct / Improve     java   oops   synchronization   volatile   java keywords     Asked in 42 Companies      intermediate        frequent

Try 1 Question(s) Test


Related Questions

  How does volatile affect code optimization by compiler?
 how is the internal code for the "volatile" implemented ?
 What are the different ways to avoid multi Threading related problems in Java ?
 Can we make array volatile in Java ?
 Have you heard of volatile Table in Teradata ?
 what is volatile and atomic


Frequently asked Generic Question.
  Q3. Why do you want to work for our company ?General2016-11-30 21:01:09

Ans. [Open Ended Answer]

Usually answered stating your keen interest in the role offered and challenges and opportunities the role offers.

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

   Like         Discuss         Correct / Improve          Asked in 42 Companies        frequent


Related Questions

  Describe, in general, how java's garbage collector works ?
  What is Generalization and Specialization in terms of casting ?
  What is a ConcurrentHashMap ?
  What the Bean scopes provided by Spring ?
  What are the various Auto Wiring types in Spring ?
  When should we use prototype scope and singleton scope for beans ?
 Which java frameworks have you used ?
 When do we generally get this database error - integrity constraint violated - parent key not found ?
 Write a program for Coin Changer application ?
 When do we generally get the database error - Unique Constraint Violated ?




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