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Interview Questions and Answers for 'Hitachi' - 4 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  Accenture      basic        frequent

Try 3 Question(s) Test


  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


 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.

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   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


 Q4. In what terms Java is better language than c and c++ ?2018-07-27 13:35:01

Ans. Java manages pointers intrinsically and gives no control over pointer arithmetic to coders and hence saves the applications from many possible problems like dangling pointers and memory leaks.

Java is platform independent and hence any application can be run on any hardware with the suitable JVM without building it separately for different hardwares.

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

   Like      Discuss      Correct / Improve          Hitachi




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