Core java - Interview Questions and Answers for 'Overstock' | 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

   



Overstock.com


   




Core java - Interview Questions and Answers for 'Overstock' - 12 question(s) found - Order By Newest

Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback )
  Q1. Difference between == and .equals() ?Core Java
Anonymous
Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory.

x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object.

Sample code:

String x = new String("str");
String y = new String("str");

System.out.println(x == y); // prints false
System.out.println(x.equals(y)); // prints true

  Sample Code for equals

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


   Like      Discuss      Correct / Improve     java   string comparison   string   object class   ==    equals   object equality  operator     Ebay  Cerner  GuideWire  Expeditors Associate  Revature  SAIC  ValueLabs  Realty Redefined  Bank Of America  Capgemini  HCL Technologies  Goldman Sachs  Symmetric Corp  Backstop Solutions  Frontier  IQOR   Science  Vanguard  eClinicalWorks  Experticity  Blue Cross and Blue Shield of Kansas  ComTrade  Banja Luka  Overstock.com  Intrasoft International  IBM  Apex Systems  infoview technologies  Ebix  Cumulus Systems  Nakisa  United HealthGroup (UHG)  Sopra Steria  TrueCaller  Mphasis  Amdocs  T & A Hr Solutions  End2End Catalyst  Code Garage Tech  IQuest Management Consultants  Indianmesh pvt ltd  Netsmartz  Meander Software  UrbanPro.com  Netrovert Software  T & A Hr Solutions  Zscaler  Maven Wave Partners  Basware India  Emerson  GCE solutions  SmartData Enterprise  Shivark Virtual Academy  FinXera  Sampoorna Consultants  Samridhi  KKA Technologies  bebo technologies  Closeloop Technologies  DamcoSoft  Swar Yantra Technologies  SK VedaInfo Universal  Trantor Software  IT HAT Consulting  Kindlebit Solutions  Mann McGlynn  AmrtData Enterprises  Riconz Technologies  Embryo Software Solution  Corporate Stalwarts  Varite  Mirror Consultancy Service  Wing Global IT Service      basic        frequent

Try 6 Question(s) Test


  Q2. What is a Lambda Expression ? What's its use ?Core Java
Admin
info@buggybread.com
Ans. Its an anonymous method without any declaration.

Lambda Expression are useful to write shorthand Code and hence saves the effort of writing lengthy Code.

It promotes Developer productivity, Better Readable and Reliable code.

  Sample Code for lambda

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


   Like      Discuss      Correct / Improve     java   java8   lambda expression   architecture     Axxess  CACI  ZonOff  Dell India  Wellington Management  N26  Lithium Technologies  DST Systems  Overstock  Sofi  JP Morgan  HCL Technologies  Infosys  Wipro  Accenture  Eurofins  Yodlee  AvenData GmbH  Sapient Global Markets  Walmart  Ebay  Goldman Sachs  Foundation Software  HSBC Holdings  Wells Fargo  Marlabs  ZooPlus  Elastic Path  CardConnect  WealthFront  WorldAware  SpredFast  Mobileum  eGym  EnelX  Kroger  GFT Technoligies  Tyro Payments  Mindtree  KocharTech  Bharti Airtel      expert        frequent

Try 1 Question(s) Test


Very frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q3. What is the difference between ArrayList and LinkedList ?Core Java
admin
info@buggybread.com
Ans. Underlying data structure for ArrayList is Array whereas LinkedList is the linked list and hence have following differences -

1. ArrayList needs continuous memory locations and hence need to be moved to a bigger space if new elements are to be added to a filled array which is not required for LinkedList.

2. Removal and Insertion at specific place in ArrayList requires moving all elements and hence leads to O(n) insertions and removal whereas its constant O(1) for LinkedList.

3. Random access using index in ArrayList is faster than LinkedList which requires traversing the complete list through references.

4. Though Linear Search takes Similar Time for both, Binary Search using LinkedList requires creating new Model called Binary Search Tree which is slower but offers constant time insertion and deletion.

5. For a set of integers you want to sort using quicksort, it's probably faster to use an array; for a set of large structures you want to sort using selection sort, a linked list will be faster.

  Sample Code for ArrayList

  Sample Code for LinkedList

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


   Like      Discuss      Correct / Improve     collections   java   data structures   arraylist   linkedlist     Deutsche Bank  Overstock.com  HCL Technologies  Infosys  EBay  The Advisory Board Company  Accuity  JC Penney  Cerner  Chase  Amazon  Deloitte  Deegit  Tata Consultancy  Cognizant (CTS)  IBM  Accenture  Mindtree  ESRI  QwikCilver Solutions  TMC Bonds  GumGum  EMC  Yelp  Classteacher Learning System  FactSet  Simply Hired  SalesForce  Royall & Company  Indeed  eClinicalWorks  TravelClick  State Farm  Manhattan Associates  GoEuro  Veeva Systems  Ness Technologies  Marlabs  Rolta  Volante Technologies  Happiest Minds Technologies  Coviam  Velocify  zanox  SimplyHired  IDBI Intech  Wissen Infotech  Nike  OnDot  PexSupply  Pramati Technologies  Credit Agricole  Mastek  Six Dee Telecom  Accuity  Kellton Tech  conduent  citrix  NEC Technologies      Basic        frequent

Try 1 Question(s) Test


  Q4. Explain OOPs Core Java2017-06-13 08:25:45

Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features

1. Inheritance for Code Reuse
2. Abstraction for modularity, maintenance and agility
3. Encapsulation for security and protected
4. Polymorphism for flexibility and interfacing

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

   Like      Discuss      Correct / Improve     oops  oops features     Trimax IT Infrastructure & Services  Aricent  HCL Technologies   Tata Consultancy (TCS)  Infosys  Cognizant (CTS)  Capgemini  Blue Coat  Symantec  Deegit  Cerner   Verizon  Ancestry  Accenture  Lexis Nexis  Elsevier  Overstock  Sofi  DeCurtis  Appirio  GlobalLogic  Robert Bosch  Lexicon IT  Teleperformance  Ranosys Technologies  InfoObjects  LoginRadius  Pixere  GirnarSoft  In Time Tec  Konstant Infosolutions  Axtria  Infostretch  TatavaSoft  E2logyCroods Consolidates  Elegant MicroWeb  IndiaNIC Infotech  Surekha Technologies  Amnex InfoTechnologies  Wishtree Technologies  Apttus  Majesco  Techsosys  Virtusa  Gruppo Banca Sella  eNoah  Volante Technologies  Karomi  Urjanet  Full Creative  Uniphore Software Systems  Revature  Saggezza  DXC Technology  QBurst  Kott Software  Petrolink Services  RapidValue Solutions  Speridian Technologies  Fingent  Marlabs  Ixigo.com  Bravura Solutions  Amdocs  GSPANN Technologies  Healthkart  Hughes Systique  Prospecta  Fidelity  Mediology Software  Ksolves  InfoGain  Mindfire Solutions  Hays  R Systems  Netrix Technology  HexaView  PayTM  Suncore Microsystem  Remaxys  ANR Software  Impetus Technologies  WittyBrains  InnovationM  Diction Technology  Bhavna Corp  Bristlecone  Fiserv  Quovantis Technologies  InnovationM  Intelligrape Software  PayCraft  Nearbuy  WSE Group  Grappus  MAQ Software  JellyFish Technologies  SysArc Infomatix  MetricStream  Delhivery  Atidan  Experis  NICE  Dark Horse IT  VizExperts  CatalystOne  Syntel  BlackNGreen  InnoEye Technologies  Java R&D  QA InfoTech  HARMAN  Eli Global  Damco Solutions  LensKart  360 Degree  FlipKart  Egen Solutions  AppzCloud Technologies  TechAhead  Yamaha Motor Solutions  Quovantis Technologies  Adobe  Samsung Noida Lab  Lybrate  Novelvox  HSBC Holdings  Fluid AI  Nelito System  GoldenSource  Naaptol  Ashtech Infotech  Mobicule  Future Group  Calypso Technology  Skillnet Solutions  3i Infotech  Nucsoft  InteractCRM  Aurionpro Solutions  Hexaware Technologies  Ness Technologies  Cigniti Inc  ValueLabs  Magnaquest  Mphasis  IVY Comptech  Medlife.com  ServiceNow  Acclaris  Reliance Jio Infocomm  Bentley Systems  Erricson Worldwide  Hyland  Xpanxion  Cerner  Codeclouds IT Solutions  Procentris      basic        frequent


Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.
  Q5. Differences between abstract class and interface ?Core Java
Admin
info@buggybread.com
Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).

A class can extend single abstract class whereas it can implement multiple interfaces.

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


   Like      Discuss      Correct / Improve     java   classes   abstract class   interfaces     GlobalLogic  HCL Technologies  Tata Consultancy (TCS)  Infosys  Wipro  Mindtree  CapitalOne  Accenture  IBM India  Infoview Technologies  Salesforce  AT&T  United Health Group (UHG)  Verilogue  Amazon  Expeditors  Syntel  SalesForce  Cornerstone OnDemand  Expedia  OLA  NSF International  Copper Mobile  Think Future Technologies  MorphoTrust  Global Healthcare  Prodigious  Internet Brands  SciQuest  arvato Systems  iCIMS  Ideas2IT  virtusa polaris  Vitech Systems  Cognizant (CTS)  Speridian Technologies  Ojas Innovative Technologies  SWC Technology Partners  Cricbuzz  Jean Martin  Capgemini  Virtusa  ECI Telecom   Aptify   Crossover  ample softech  Metanoia software solutions  Overstock.com  Unic Sol India  Experis India  Intellect Design Arena  Sarathi Softech  Transorg Analytics  Cibersites India  Resource Weaver  Indium Software  Kone Elevator  Merkur Gaming  Prama Hikvision  Gurucul Solutions  e-Zest Solutions  ReadMind Info Services      basic        frequent


Very Frequently asked. Usually asked along with String Class related questions.
  Q6. What is an immutable class ?Core Java
Anonymous
Ans. Class using which only immutable (objects that cannot be changed after initialization) objects can be created.

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

   Like      Discuss      Correct / Improve     java   oops   immutable   immutable class   string class   basic interview question     Cognizant (CTS)  Hybris  YuMe  ebizAutos  Deloitte  HCL Technologies  Tata Consultancy (TCS)  Infosys  Accenture  Overstock.com  Elsevier  Endurance International Group  SynergisticIT  Verizon  Capgemini  Ebay      Basic        frequent

Try 2 Question(s) Test


Frequently asked at HCL Technologies ( Based on 3 feedback )
  Q7. Difference between Checked and Unchecked exceptions ?Core Java
Anonymous
Ans. Checked exceptions are the exceptions for which compiler throws an errors if they are not checked whereas unchecked exceptions are caught during run time only and hence can't be checked.

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

   Like      Discuss      Correct / Improve     java   exceptions   checked exceptions   unchecked exceptions   exception handling   basic interview question     Verilogue  F5 Network  Pegasystems  PegaSystems  SAP  Ciber  Conde Nast  Pramati Technologies  IBM  JP Morgan  HCL Technologies  Tata Consultancy (TCS)  Cognizant (CTS)  Cogent Infotech  MarketAxess  defense group  NETS INTERNATIONAL  Accenture  Integra Micro  ColdLight Solutions  Endeavor  Deloitte  Infosys  Jean Martin  Symantec  Ancestry  Overstock.com  Adobe  Ultimo  CRIF  Sapeins  Flexera  Sofi  Morgan Stanley  Barclays      basic        frequent

Try 1 Question(s) Test


Very Frequently asked. Favorite question in walkins and telephonic interviews. Usually among first few questions. Asked in different variants. Must know for intermediate and expert professionals.Among Top 10 frequently asked questions.
  Q8. What is rule regarding overriding equals and hashCode method ?Core Java
Admin
info@buggybread.com
Ans. A Class must override the hashCode method if its overriding the equals method.

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

   Like      Discuss      Correct / Improve     java   collections   hashcode  hash code   equals   collections     Cognizant (CTS)  CapitalOne  Tata Consultancy (TCS)  HCL Technologies  Deloitte  Wipro  Infosys  Sabre  Sophos   Tieto  Addteq  Priceline.com  Cisco Systems  Visa Inc  Vibrant Media  Audience Science  GT Nexus  OpenCrowd  Instinet  Kronos  Elsevier  IMC Financial  LG Mobile  Dun & Bradstreet  WBUT  codecentric  Satmetrix  Interactive Brokers  Roposo  SecureView  Azuga  Envestnet  Criteo  Skillz  MobileIron  Walmart  R Systems  Overstock.com  Verilogue  Goldstone Technologies  FatWire  LinkedIn  Southwest Airlines  Crossover for Work      intermediate        frequent

Try 1 Question(s) Test


 Q9. Is It Good to use Reflection in an application ? Why ?Core Java
Admin
info@buggybread.com
Ans. no, It's like challenging the design of application.

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

   Like      Discuss      Correct / Improve     java   reflection api   yes-no   architecture     Overstock.com      intermediate



Do you think these are the Best Java Frameworks ?

OpenXavaSPRING MVCApache StripesCheck everything
that is Best in Java

Click Here



Frequently asked these days as there are major changes in Java 8.
  Q10. What are new features introduced with Java 8 ?Core Java
Admin
info@buggybread.com
Ans. Lambda Expressions , Interface Default and Static Methods , Method Reference , Parameters Name , Optional , Streams, Concurrency.

  Sample Code for Lambda

  Sample Code for interface default

  Sample Code for Optional

  Sample Code for Streams

  Sample Code for java.time

  Sample Code for Predicate

  Sample Code for Consumer

  Sample Code for MapMerge

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

   Like      Discuss      Correct / Improve     java   java8   technical lead   technical architect     Kayak.com  Luxoft  Overstock.com  Span Infotech  Wealthfront  EMC  L&T Infotech  Vistana  Luxoft  GoodData  DreamWorks Animation  Cognizant (CTS)  Overstock   Nucleus      expert        frequent


Recently asked in Sophos
 Q11. Write a Method to get a map of words and their count by passing in the stringCore Java

Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?keyword=Method+to+get+a+map+of+words&category=code

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

   Like      Discuss      Correct / Improve     map  collections     Sophos  Overstock.com      intermediate


 Q12. How is String class unique ?Core Java2016-11-30 15:46:13

Ans. String class is immutable as well as final. Because of these properties , String objects offer many benefits

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 doesnt 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 its 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     immutable  immutability  String  string class     Overstock.com




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

Overstock.com: Very lengthy interview process. I think they ... Anonymous

X Close this

Help Us Improve.
Please share your
interview experience.

Company Name:   


Questions Asked: