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

Search Interview Questions


 2426 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

   



Hitachi


   




Interview Questions and Answers for 'Hitachi' - 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     Cognizant (CTS)   San Jose State University (SJSU)  HCL Technologies   Deloitte  Sophos  Hitachi  JPMorgan Chase  IBM  Kony Labs  Keystone  ebay  TIAA Financial Services  Ancestry   Rakuten      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.
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
  Why Char array is preferred over String for storing password?
 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
  Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?


  Q2. Write a method to check if input String is Palindrome?Core Java
Admin
info@buggybread.com
Ans. private static boolean isPalindrome(String str) {

if (str == null)
return false;

StringBuilder strBuilder = new StringBuilder(str);

strBuilder.reverse();

return strBuilder.toString().equals(str);

}

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

   Like      Discuss      Correct / Improve     java   string   stringbuilder   stringbuilder   string class   code   palindrome     HCL Technologies  Hootsuite  ebay  Mobile Apps Company  TripAdvisor  Wallet Hub  Groupon  OpenText  Airbnb  Vantiv  Minted LLC  Boston Analytics  mint.com  Arista Networks  Dealer.com  the Zappos Family  Sony PlayStation  Taser  Wolters Kluwer  Wize Commerce  Hitachi Consulting  Quickr  SmartBrief  Liaison International  Monitise  Exilant Technologies  Enova  Wayfair  Amadeus  MakeMyTrip  Naggaro  Vudu  OnDeck Capital  HighRadius   thePlatform  Trimax IT Infrastructure & Services      Basic        frequent


Related Questions

  Which keyword is used to provide explicit access of a code block to single thread ?

a. Transient
b. Final
c. Explicit
d. Synchronized
  How does volatile affect code optimization by compiler?
 What is the difference between the following two code lines ?

1. new OuterClass().new InnerClass();

2. new OuterClass.InnerClass();
  Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?
  If you are given a choice to implement the code to either Insert a Record or Update if already exist, Which approach will you follow ?
  How can we make sure that a code segment gets executed even in case of uncatched exceptions ?
  Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?
 What is the difference between these two approaches of creating singleton Class ?

//Double Checked Locking Code
public static Singleton createInstance() {
   if(singleton == null){
      synchronized(Singleton.class) {
         if(singleton == null) {
            singleton = new Singleton();
         }
      }
   }
   return singleton;
}

//Single checked locking code
public static Singleton createInstance() {
   synchronized(Singleton.class) {
      if(singleton == null) {
         singleton = new Singleton();
      }
   }
   return singleton;
}
 What is the difference between following two segments of code

Code 1

int x = 4 * 3;
int y = x * 5;

Code 2

int y = 4 * 3 * 5;

  When you will synchronize a piece of your code?


 Q3. What is a Webdriver ?Testing2017-02-02 08:25:41

Ans. Selenium WebDriver is a tool for automating web application testing.It helps in replicating the manual tester behavior like keyboard entry, mouse events etc and then matching the output against the expected.

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

   Like      Discuss      Correct / Improve     selenium  webdriver     Global Software Resources  FICO Software  Walt Disney  Softcrylic  Sky  23andMe  Endurance Group  CitiusTech  Hitachi Consulting  Crest Premedia  LivingSocial  TEKSystems  Jabong.com  Think Future Technologies  Dollar Shave Club  Zendesk  Five9  Aptify  Symphony Teleca  Collabera  Xpanxion  Fourth Technologies  Freedom Financial  Aurigo Software Technologies  Forte Group  Wipro  Infosys  Pearson  Overstock  Elsevier  Capgemini  Cognizant (CTS)  Tech Mahindra  OLA Software  Mphasis  GrayLocus  Bhavna


Related Questions

  How to access a Web Element if there are many elements with the same XPath ?
 How do you take screenshot in selenium?




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: