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Interview Questions and Answers for 'Nagarro' - 4 question(s) found - Order By Newest

Frequently asked question in companies using Hibernate.
  Q1. What is Lazy Initialization in Hibernate ?Hibernate
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Ans. It's a feature to lazily initialize dependencies , relationship and associations from the Database. Any related references marked as @OneToMany or @ManyToMany are loaded lazily i.e when they are accessed and not when the parent is loaded.

  Sample Code for Lazy Initialization

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   Like      Discuss      Correct / Improve     hibernate   lazy loading hibernate   lazy initialization hibernate   architecture     overstock.com  BridgePoint Technologies  Medgate  Dex Media  Diversant  Tieto  Oracle  Bank of America Merrill LYNCH  NEC Japan  HCL Technologies  Deloitte  Accenture  Infosys  Tata Consultancy (TCS)  Luxoft  Nvidia  Cority  Kumaran Systems  PubMatic  Deven Infotech  Tavant  Casenet  Azuga  Egen Solutions  Photon Infotech  Dun & Bradstreet  ITHAKA  EngineerBabu  Atos  Zycus  CPA Global  Zycus  Fareportal  Saxo Bank  NSF International   Publicis  Sapient Razorfish  Pratham Software  ATCS  Q3 Technologies  Metacube Software  A3Logics  Nagarro  Tech Mahindra  Patni Computers  L&T Infotech  Mphasis  Mindtree  Hexaware  Collabera  3i Infotech  IGate  Kpit Technologies  NIIT Technologies  Trianz  Persistent Systems  IT Asset      Basic        frequent

Try 2 Question(s) Test


Very frequently asked if being interviewed for hibernate. Frequently asked in Tata Consultancy (TCS) and Overstock.com
  Q2. Difference between load and get ?Hibernate
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Ans. If id doesnt exist in the DB load throws an exception whereas get returns null in that case.get makes the call to DB immediately whereas load makes the call to proxy.

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   Like      Discuss      Correct / Improve     hibernate     Overstock.com  Nagarro  Anthem  Tata Consultancy (TCS)  Nucleus Software Exports  CDK Global  Dell  Capgemini  Persistent Systems  HCL Technologies  Nagarro  Sears  CDK Global  Oracle  Nucleus Software Exports  CACI International      basic        frequent


  Q3. What is a self Join and give an example of a self Join ?

or

What is self Join and What is it's purpose ?
Database2016-06-30 20:13:35

Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later.

Select D1.name , D2.name from Dept D1, Dept D2 where D1.employee_count < D2.employee_count

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   Like      Discuss      Correct / Improve     sql  joins  self join  self-join  Pair of employee names with first having lesser salary than later  Pair of department names where first dept has lesser employees than the later     Accenture  West Monroe Partners  Oracle  eBay  Impetus Technologies  Bank of America  Fannie Mae  Wize Commerce  Kleward Consulting  Pyramid Consulting  Interra Information Technologies  Trigent Software  Xtreme Media  IGATE  Nagarro  Six Sigma  Nityo Infotech  Fujitsu  BlazeClan  Twist Bioscience  Invoyent  Cognizant (CTS)  i2c  Capgemini   Blazeclan      basic        frequent


 Q4. What is serialVersionUID ?Core Java2016-12-20 17:26:52

Ans. Everytime an object is serialized the java serialization mechanism automatically computes a hash value by passing the meta information for the class. This id is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization

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   Like      Discuss      Correct / Improve     serialVersionUID  serialization     Tieto  Priceline.com  Nagarro      expert        rare




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