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

Search Interview Questions


 3180 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

   



Core java - Interview Questions and Answers for 'Indra' - 14 question(s) found - Order By Newest

  Q1. 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  Accenture India  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  Tech Mahindra  Patni Computers  L&T Infotech  Mphasis  Mindtree  Hexaware  Collabera  3i Infotech  IGate  Kpit Technologies  NIIT Technologies  Trianz  Persistent Systems  IT Asset  1-800 contacts      expert        frequent

Try 1 Question(s) Test


  Q2. What is a String Pool ?Core Java
Anonymous
Ans. String pool (String intern pool) is a special storage area in Java heap. When a string is created and if the string already exists in the pool, the reference of the existing string will be returned, instead of creating a new object and returning its reference.

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

   Like      Discuss      Correct / Improve     java   oops   string   string class   string pool   heap memory     SAS Institute  Ariba  GuideWire  Harbinger  Oracle  Virtusa  Knoa  Polaris  GuideWire  HCL Technologies  Tata Consultancy (TCS)  Infosys  Technologent  MphasiS  Harbinger Group  Kony  Evergent  NTT Data  VMware  Markit  Ariba  Tech Mahindra  Bureau Veritas  InfoStretch  PTC Software  Mindtree  Centre for Internet and Society (CIS)  Trimax IT Infrastructure & Services  City National Bank (CNB)      intermediate        frequent

Try 2 Question(s) Test


Basic and Very Frequently asked.
  Q3. 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  object oriented programming (oops)  oops concepts  oops concepts     Credit Suisse  Unbounded Solutions  Microsoft   Google  Purch  HCL Technologies  Tata Consultancy (TCS)  Wipro  Mathworks  Accenture  Accenture India  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  Accenture India  Tech Mahindra  Patni Computers  L&T Infotech  Mphasis  Mindtree  Hexaware  Collabera  3i Infotech  IGate  Kpit Technologies  NIIT Technologies  Trianz  Persistent Systems  IT Asset  FIA-US  VanGuard  General Atomics      Basic        frequent

Try 2 Question(s) Test


Very frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q4. What is a final method ?Core Java
Anonymous
Ans. Its a method which cannot be overridden. Compiler throws an error if we try to override a method which has been declared final in the parent class.

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

   Like      Discuss      Correct / Improve     java   oops   final   final method     Oracle  Intertek  HCL Technologies  Tata Consultancy (TCS)  Accenture  Accenture India   IBM  Goldman Sachs   TrueCar   Intertek RedMane   Antra  Flanders Software  Causecode Technologies  ING Direct  Intertek  Tudip Technologies  Finance One  Mphasis  #i Infotech  L&T Infotech  Tata Elxsi  State Farm  Cerner  Deegit  Infosys Technologies  Wipro  Mahindra Satyam  Global Logic  InfoGain  Cognizant (CTS)      basic        frequent

Try 1 Question(s) Test


Very Frequently asked to fresh graduates and less experienced. Favorite question in Walk in drives. Frequently asked in Indian Services companies.
  Q5. Difference between Overloading and Overriding ?Core Java
Anonymous
Ans. Overloading - Similar Signature but different definition , like function overloading.

Overriding - Overriding the Definition of base class in the derived class.

  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     java   oops   overloading   overriding   oops concepts   basic interview question     PC Technology  Cognizant (CTS)  Donlen   hybris Software  RedMane  Allerin Technologies  Gemalto  Allerin Technologies  HCL Technologies  Tata Consultancy (TCS)  Accenture  Accenture India  Infosys Technologies  Polaris  United Healthcare India  IBM India  Xchanging  American Express  Antra  Flipp  Computer Sciences Corporation (CSC)  Garmin  NetSuite  Donlen  Hudsons Bay  Techlogix  SevOne  Synactive  Oodles Technologies  FDM Group  Marlabs  RedMane Technology  Faichi Solutions  TD  Tech Mahindra  Shutterfly  Luxoft  PC Technology  CCC Information Services  State Farm  Raja Software  Mastek  EPAM  Morgan Stanley  SummitWorks  Sony  Citibank  Emtec  LowerMyBills  Consilience  Xavor  AllState  FasTrak  AmTrust Financial  Walt Disney  Ultramain Systems  International Turnkey Systems  Knoldus Software  CA Technologies  Amdocs  FDM Group  Hybris  Fidelity  United Health Group (UHG)  Bluewhale Solutions  Pegasystems  Revature   Innoplexus  Vanguard  AptSource  Perficient  Grapecity  Subex  QuintilesIMS  NimbleUser  Expeditors Associate  Sapient  HR Cloud  Summitworks  Jabong.com  Kony Labs  Price Waterhouse Coopers (PWC)      basic        frequent

Try 1 Question(s) Test


Frequently asked in Indian Service Companies. Tech Mahindra ( Based on 3 inputs ) and Infosys ( 3 inputs )
  Q6. What is the difference between List, Set and Map ?

or

What are the different Java Collections Interfaces ?
Core Java
Anonymous
Ans. List - Members are stored in sequence in memory and can be accessed through index.
Set - There is no relevance of sequence and index. Sets doesn't contain duplicates whereas multiset can have duplicates.
Map - Contains Key , Value pairs.

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

   Like      Discuss      Correct / Improve     java   collections   list   set   map     Cognizant (CTS)  Ebay   Infosys   HCL Technologies   Tech Mahindra  Cumulus Systems  Mindteck  American Express      basic        frequent

Try 1 Question(s) Test


Very frequently asked in HCL Tech ( Based of 4 inputs )
  Q7. Write a program to reverse a string iteratively and recursively ?Core Java
Admin
info@buggybread.com
Ans. Using String method -

new StringBuffer(str).reverse().toString();

Iterative -

public static String getReverseString(String str){
StringBuffer strBuffer = new StringBuffer(str.length);
for(int counter=str.length -1 ; counter>=0;counter--){
strBuffer.append(str.charAt(counter));
}
return strBuffer;
}

Recursive -

public static String getReverseString(String str){
if(str.length <= 1){
return str;
}
return (getReverseString(str.subString(1)) + str.charAt(0);
}

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


   Like      Discuss      Correct / Improve     java   string   reverse   stringbuffer   string class   code     HCL Technologies  Exelis  Mahindra Comviva  Fidelity National Information Services (FIS)   Genpact  Digite Infotech        frequent


  Q8. Explain static blocks in Java ?Core Java
Anonymous
Ans. A static initialization block is a normal block of code enclosed in braces, { }, and preceded by the static keyword. Here is an example:

static {
// whatever code is needed for initialization goes here
}

A class can have any number of static initialization blocks, and they can appear anywhere in the class body. The runtime system guarantees that static initialization blocks are called in the order that they appear in the source code.

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

   Like      Discuss      Correct / Improve     java   oops   static   static block     Daffodil  Visa Inc  Logica  DataMetica  Tech Mahindra  Nagarvision  3i infotech  CA Technologies  HexaView Technologies  Propellum Infotech  DataMetica  VMC Consulting  Tavant  Novelvox  InfoGain      basic        frequent


Frequently asked in face to face interviews.
  Q9. Write a program to print fibonacci series.Core Java

Ans. int count = 15;
int[] fibonacci = new int[count];
fibonacci[0] = 0;
fibonacci[1] = 1;
for(int x=2; x < count; x++){
fibonacci[x] = fibonacci[x-1] + fibonacci[x-2];
}

for(int x=0; x< count; x++){
System.out.print(fibonacci[x] + " ");
}

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

   Like      Discuss      Correct / Improve     ebay   fibonacci series     Manvish eTech  Belvedere Trading  King UK  FinaTel  Goldman Sachs  Enlighten Software  Misys  Mahindra Comviva  ZapCom  Nucleus Software Exports  Enlighten  Sears  Mahindra Satyam  Insperity  General Motors  AVIS e Solutions  Paddy Power Betfair  TurningCloud  Polestar Solutions  BlueWhale Solutions  CitiusTech  Zuhlke  Comcast  KGFSL  Quickr  Paramatrix Technologies  CalSoft  Ancestry.com  OnMobile Global  NBCUniversal  Inventum Technologies  Hughes Systique  Flextronics  Geometric Soft  Check Point Software Technologies  ZapLabs  Indecomm Global Services  HTC Global  Quovantis Technologies  Mobiloitte  Riktam Technologies  DMX Technologies  Mojo Networks  Tata Elxsi  Ciena  ServiceNow  EverBridge  LendingClub  Virtusa Polaris  West Corporation  Ebay  Walmart  HomeAway  AllClear ID  Quinnox Software  Acquity Group  Cadence Design Systems  SmartPrix  Leidos  Zoho  Varian Medical Systems  HealthSparq  karya technology  Canopy Tax  23AndMe      basic        frequent



Do you think these are the Best Java Frameworks ?

OpenXavaSPRING MVCApache StripesCheck everything
that is Best in Java

Click Here



 Q10. Write a program to calculate factorial of a number using recursionCore Java

Ans.

public class Factorial {
   public static void main(String[] args){
      int x = 5;
      
      System.out.println(calculateFactorial(x));
   
   }
   
   private static int calculateFactorial(int x){
      if(x==1){
         return 1;
      }
      return x * calculateFactorial(x-1);
   }
}

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

   Like      Discuss      Correct / Improve     factorial  calculate factorial  code  coding  recursion     Mahindra Comviva      basic


  Q11. What is a Destructor ? Do we have Destructors in Java ?Core Java

Ans. Destructor is used to de-allocate memory allocated by objects.

There are no destructors in Java. Alternatively, Java provides Automatic garbage collection i.e automatically releasing the un-referenced memory.

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

   Like      Discuss      Correct / Improve     destructor  garbage collection     Mahindra Comviva  Quinnox  MathWorks  Wipro  Publishers Clearing House (PCH)  Compro Technologies      Basic        frequent

Try 1 Question(s) Test


Frequently asked to Fresh graduates.
 Q12. Write a program to implement Binary search ?Core Java2016-10-18 10:49:58

Ans. http://algs4.cs.princeton.edu/11model/BinarySearch.java.html

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

   Like      Discuss      Correct / Improve     binary search  search     Cognizant (CTS)  Click Labs  Infoview Technologies  Mahindra Comviva  Acute Informatics      basic        frequent

Try 1 Question(s) Test


Usually asked to entry level software developers.
  Q13. Write a program to swap two variables without using thirdCore Java2017-01-19 15:38:34

Ans. public static void main(String[] args) {
   int num1 = 1;   
   int num2 = 2;
   num1 = num1^num2;
   num2 = num1^num2;
   num1 = num1^num2;
   System.out.print("num1 = " + num1 +", num2 = "+num2);
}

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

   Like      Discuss      Correct / Improve     code  coding     Deloitte  Colgate Palmolive  Tech Mahindra  SAP  Broadcom  Tata Consultancy (TCS)  Wipro  Gemalto  Time op  Nse Tech  Client Network Services  Monte Carlo  BrainMobi Technologies  Nokia  Minted LLC  Societe Generale  MetricStream  Sapient Global  HighRadius  Mindtree  Robert Bosch  Cypress Semiconductor  Tesco  NTT Data  Tejora Technologies  Saggezza  Elegant Microweb  AMD  Advanced Micro Devices  Tricon Infotech  Odessa Technologies  Aditi  Max Secure Software India  NetSuite  Volante Technologies  Subex Limited  Plintron Global Technology Solutions      basic        frequent


  Q14. What are the core OOPs concepts ?Core Java2017-02-06 16:15:55

Ans. Abstraction, Encapsulation, Polymorphism , Composition and Inheritance

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

   Like      Discuss      Correct / Improve     core oops concepts     Diebold Nixdorf  Sharekhan  Pepperfry  IRIS Business Services  Wind World  ZEDO  Loylty Rewardz Mngt  C2L Biz  Chenoa Information Services  Insolutions Global  Vakrangee Softwares  Celusion Technologies  Currencies Direct  Zenith System Solutions  Base Information Management  Exponentia DataLabs  Realty Redefined  Constaccent  Neoquant Solutions  Aureus Analytics  Planfirma Technologies  Pawaa Software  iBhejo  Fairfax County Virginia  American Conservation Experience  Hari Krishna Exports  Core Education & Technologies   Nishat Mills  Industrial Market Place  Krisnela Technologies  Swissclear Global  Samyak Software  Professional Access  Nexstep Infotech  Concerto Software  Viral Technologies  Silverwing Technologies  Gcom Software Inc  Accel Frontline  Atom Technologies  Blue Star Infotech  Cynapse  Datamatics Global Services  Flytxt Mobile Solutions  Persistent Systems  Onmobile Global  Trianz  Sasken  WNS Global Services  Wipro  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




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: