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

Search Java Interview Questions


 2137 questions in repository.
 There are more than 200 unanswered questions.
Click here and help us by providing the answer.
Label / Company      Label / Company / Text

   



Interview Questions and Answers for 'Prokarma' - 5 question(s) found - Order By Newest

Advanced level question. Frequently asked in High end product companies. Frequently asked in Cognizant ( Based on 2 feedbacks )
  Q1. Why is String immutable in Java ?Core Java
Anonymous
Ans. 1. String Pool - When a string is created and if it exists in the pool, the reference of the existing string will be returned instead of creating a new object. If string is not immutable, changing the string with one reference will lead to the wrong value for the other references.

Example -

String str1 = "String1";
String str2 = "String1"; // It doesn't create a new String and rather reuses the string literal from pool

// Now both str1 and str2 pointing to same string object in pool, changing str1 will change it for str2 too

2. To Cache its Hashcode - If string is not immutable, One can change its hashcode and hence it's not fit to be cached.

3. Security - String is widely used as parameter for many java classes, e.g. network connection, opening files, etc. Making it mutable might possess threats due to interception by the other code segment.

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

   Like      Discuss      Correct / Improve     java   oops   string   string class   immutable   advanced     Barclays  Jungo  Cloudera  Allston  Man Group  Prokarma  Optimus  Gamesys  ABS  TransPerfect  Fidelity  Deloitte  Zalando  Cognizant (CTS)  Zeta Interactive  SuccessFactors   EchoStar  InterGlobe Technologies  HCL Technologies  Intuit  JP Morgan  Optimus Information  Faichi Solutions  Blip  Adobe  Subex Limited  Remo Software  Allstate  IBM  Bizmatics  Bytecode Cyber Security  Calsoft Systems  IDS Infotech      expert        frequent

Try 4 Question(s) Test


  Q2. Can we have null keys in TreeMap ?Core Java
Admin
info@buggybread.com
Ans. No, results in exception.

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

   Like      Discuss      Correct / Improve     java   collections   treemap     Visa  Prokarma  Sabre  Polaris  Deloitte  Cognizant (CTS)      Basic        frequent


 Q3. What is a ConcurrentHashMap ?Core Java
Admin
info@buggybread.com
Ans. ConcurrentHashMap is a hashMap that allows concurrent modifications from multiple threads as there can be multiple locks on the same hashmap.

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

   Like      Discuss      Correct / Improve     java   collections   hashmap   map   concurrenthashmap   concurrenthashmap  concurrency   general electric   ge     Cognizant (CTS)  Synechron  General Electric  MakeMyTrip.com  Nomura Securities  Xpanxion  Royal Bank of Scotland (RBS)  ProKarma  Talentica  Citi  EdgeVerve Systems  Six Dee Telecom  ReqRoute  Qumulo  Goldman Sachs  HSBC Holdings  AlertMe.com  BlackRock  Helpchat  Bally Technologies  Hubzu  Xpanxion  Coromandel Infotech  Paytm  YuMe  InfoGain  Markit  Wells Fargo  Geometric  Acloudzyn Technologies  Roposo        rare


  Q4. What is lazy fetching in Hibernate ?Hibernate
Admin
info@buggybread.com
Ans. Lazy fetching is the technique of not loading the child objects when parent objects are loaded. By default Hibernate does not load child objects. One can specify whether to load them or not while doing the association.

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

   Like      Discuss      Correct / Improve     hibernate   lazy fetching   architecture     Aldo  Rent the Runway  Veteran Corps  United Health Group (UHG)  Medgate  Prokarma  Mars Telecom Systems  Dun & Bradstreet  Kumaran Systems  Tavant Technologies  CaseNet        frequent

Try 2 Question(s) Test


 Q5. What is Dirty read in Database Transactions ?Database2016-11-14 13:11:55

Ans. A dirty read occurs when a transaction is allowed to read data from a row that has been modified by another running transaction but not yet committed.

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

   Like      Discuss      Correct / Improve     database transaction     Credit Agricole  Cassiopae  Infosys  Goldman Sachs  ISN Software  ProKarma  Sapient  Scotiabank




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

1 person from Ashburn are looking for questions for 'Prokarma'. Connect with them to better prepare for your interview.
X Close this

Help Us Improve.
Please share your
interview experience.

Company Name:   


Questions Asked: