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

Search Interview Questions


 3007 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

   



Solution - Interview Questions and Answers for 'Oracle' - 6 question(s) found - Order By Newest

Frequently asked question in companies using Hibernate.
  Q1. What is Lazy Initialization in Hibernate ?Hibernate
Admin
info@buggybread.com
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

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


   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      Basic        frequent

Try 2 Question(s) Test


Basic and Very Frequently asked.
  Q2. What is Polymorphism in Java ?Core Java2016-11-06 09:10:54

Ans. Polymorphism means the condition of occurring in several different forms.

Polymorphism in Java is achieved in two manners

1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas

2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding.

  Sample Code for overloading

  Sample Code for overriding

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

   Like      Discuss      Correct / Improve     polymorphism  oops concepts     Credit Suisse  Unbounded Solutions  Microsoft   Google  Purch  HCL Technologies  Tata Consultancy (TCS)  Wipro  Mathworks  Accenture  ZonOff  ZapCom  Addteq  Priceline.com  Acute Informatics  Trimax IT Infrastructure & Services   USAA  HCL Technologies  FDM Group  AppEnsure  Inov8  TIAA  Revature  Lockheed Martin  ScotiaBank  Algorhythm Tech  Aurus  Xpanxion  Bitwise Pune  GS Labs  Bitwise India  CRIF  Saggezza  Synchrony  Micro Focus  Mindtree  Zycus  Capgemini  ZapCom Group  Infosys Technologies  SLK Group  Intuit Bangalore  Quickr  Comviva Technology  Altimetrik  IDEALINVENT Technologies  Kewill  coMakeIT  Vekomy Technologies  Eze Software  State Farm  Rolta  State Street  High Radius  Cerner  TIBCO  3i Infotech  Goldman Sachs  ITC  abhra  InteractCRM  Polaris  Naggaro  Siemens  Hexaware Technologies  Skillnet solutions  Logixal Solutions Mumbai  Naaptol Mumbai  Logixal Solutions  NSETECH  Mastek Mumbai  AppAmplify Noida  HexaView Technologies  Wipro  Wittybrains Software Technologies  Meenakshi Noida  Eastern Software Systems Noida  MediaAgility Gurgaon  Daffodil Software  Oracle Gurgaon  Kellton Tech Gurgaon  Bharti Airtel Gurgaon  IHS Markit Gurgaon  Sinew Gurgaon  Grappus Gurgaon  Erricson Gurgaon  Deloitte  Accenture      Basic        frequent

Try 2 Question(s) Test


Advanced level question frequently asked in US based companies. Recently asked in EMC and Intuit.
  Q3. Can you provide some implementation of a Dictionary having large number of words ? Solution
Admin
info@buggybread.com
Ans. Simplest implementation we can have is a List wherein we can place ordered words and hence can perform Binary Search.

Other implementation with better search performance is to use HashMap with key as first character of the word and value as a LinkedList.

Further level up, we can have linked Hashmaps like ,

hashmap {
a ( key ) -> hashmap (key-aa , value (hashmap(key-aaa,value)
b ( key ) -> hashmap (key-ba , value (hashmap(key-baa,value)
....................................................................................
z( key ) -> hashmap (key-za , value (hashmap(key-zaa,value)
}

upto n levels ( where n is the average size of the word in dictionary.

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

   Like      Discuss      Correct / Improve     java   collections   hashmap   binary search   search algorithm   advanced   architecture   data structure     Dell EMC   Intuit   Corporate Brokers  PWC India  Yahoo  Oracle        frequent

Try 1 Question(s) Test


  Q4. Difference between Vector and ArrayList ?Core Java
Anonymous
Ans. Vectors are synchronized whereas Array lists are not.

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

   Like      Discuss      Correct / Improve     java   basic interview question   vector   arraylist   collections   synchronization     Oracle  Lab49  Infosys  Wipro  Zoho  HCL Technologies  Tata Consultancy (CTS)  BirlaSoft  Emory  Xplana  British Telecom (BT)  Apex Systems  Capgemini  Accenture  3dplm Software Solution  AppKnox  eIntern  Landmark Information Group  ESystems  Orbitz Worldwide  HARMAN  Starmount  iConsultus  KARYA Technologies  Smart Chip  Cuelogic Technologies  Kronos  Trigent Software  Deloitte  ACI Worldwide  Unisys  Tavant Technologies  Referance data      basic        frequent


Frequently asked to fresh graduates.
 Q5. What is ACID ?Database2016-11-04 08:09:44

Ans. ACID stands for Atomicity, Consistency, Isolation, Durability is a set of properties of database transactions.

Atomicity means all or nothing. i.e parts of a transaction shouldn't commit if any one of them fails. Either the whole transaction should succeed or it should be complete rollback.

Consistency means that any transaction should lead database from one stabe state to another.

Isolation means that the execution of transaction results in a system state that would be obtained if transactions were executed serially.

Durability means that when a transaction is committed it forms the permanent state of database.

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

   Like      Discuss      Correct / Improve     database  acid     CapitalOne   Tata Consultancy (TCS)  SilverRail Technologies  A9.com  Oracle  Sirius Computer Solutions      Intermediate

Try 1 Question(s) Test


  Q6. What is a Database Trigger ?Database2016-10-18 11:31:17

Ans. A trigger is a special kind of stored procedure that automatically gets executed upon an event in the database server.

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

   Like      Discuss      Correct / Improve     database   trigger     Cognizant (CTS)  Acclaris  RedMane  Oracle  Mediaocean  Monsanto  Synchronoss  Unbounded Solutions  Clover  Jabong.com      basic        frequent




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: