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Interview Questions and Answers for 'Infoview technologies' - 16 question(s) found - Order By Newest

Very Very frequently asked. Among the first few questions in almost all interviews.Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys 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

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 Q2. Which of the following combination of keywords is illegal in Java ?

a. static and transient
b. transient and final
c. static and synchronized
d. abstract and final
Core Java
Anonymous
Ans. abstract and final

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Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 2 feedback ). Among first few questions in many interviews.
  Q3. 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 ).

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Frequently asked question for intermediate developers.
  Q4. What is Volatile keyword used for ?Core Java
Anonymous
Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached.

  Sample Code for volatile

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   Like      Discuss      Correct / Improve     java   oops   synchronization   volatile   java keywords     ABC Ltd   Ciena  Xchanging  Square  Infoview Technologies  HCL Technologies  EPAM  GrubHub  TeleMessage  TRUSTe  Informatica  Square  Medidata Solutions  Yellow Pages  eQ Technologic  Sutra Analytics  CustomerXPs  Globant  BB Holdings  Rakuten  Booking.com  BlackRock  Qualcomm  LSI Corporation  ARM Holdings  SpaceX  Toshiba  Peapod  Amadeus  Apptio  Tivo  EchoStar  HomeAway  Syscom Technologies  Aversan  Symantec  Samsung India  Axtria  Qualcomm  CGI Group      intermediate        frequent

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 Q5. Can static method access instance variables ?Core Java
Anonymous
Ans. Though Static methods cannot access the instance variables directly, They can access them using instance handler.

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   Like      Discuss      Correct / Improve     static   static method   java   oop   variables     Infoview Technologies      basic        frequent


Recently asked in Infoview Technologies.
 Q6. What is a Default Constructor ?Core Java
Anonymous
Ans. The no argument constructor provided by Java Compiler if no constructor is specified.

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   Like      Discuss      Correct / Improve     java   oops   constructor   default constructor     Infoview Technologies      Basic        frequent

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  Q7. Explain the challenging problems you faced recently and how you overcame it ?General

Ans. [Open Ended Answer]

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Must know at all levels. Among Top 10 frequently asked questions in Java. Very frequently asked to fresh graduates or less experienced professionals.
  Q8. What is Inheritance ?Core Java

Ans. Its a facility for code reuse and independent extension wherein a derived class inherits the properties of parent class.

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Frequently asked to Fresh graduates.
 Q9. Write a program to implement Binary search ?Core Java2016-10-18 10:49:58

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

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All these acronyms JDK,JRE,JVM etc are very frequently asked.
 Q10. Difference between JDK and JRE ?Core Java2016-06-11 11:35:18

Ans. JRE or Java Runtime Environment is the Java Virtual Machine on which class files are executed. It includes borwser plugins that facilitates execution of class files in browsers.

JDK or Java Development Kit includes JRE , compiler and development tools.

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 Q11. How do you manage source code in repository if you have multiple releases lined up and different teams are working on it? Tools2016-06-23 09:03:52

Ans. We creates separate branches for each project if development work is going on parallel and they are to be released at different times. Once the first release is done, we merge the branch changes into trunk. If they all have to go at one time, we usually would merge everything in the trunk itself.

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   Like      Discuss      Correct / Improve     scm  source code management  svn  version control  code repository  svn branch     IVTL InfoView Technologies


 Q12. What was the driving force to introduce default methods in Interfaces wef from Java 8 ?Core Java2016-07-14 14:36:49

Ans. Earlier any class implementing an interface was supposed to implement all methods declared in an interface. There was no place for optionally implementing all or subset of methods.Though we have abstract classes wherein we could have provided such a mechanism by declaring some methods as abstract while providing definition for some. But as Abstract classes have a body and are comparatively heavier than interfaces and interfaces associate closely to the concept of providing interfacing than abstract classes, Java might have though of providing optional implementation for default methods. This way same interface can be reused in variety of ways rather than making copies of an interface to suit different needs.

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   Like      Discuss      Correct / Improve     java 8   java8  interface default methods  default methods     Infoview Technologies  Oracle  Oracle Polska  Infosys  Tata Consultancy (TCS)  CEBS Worldwide


 Q13. What are Collection Classes ?Core Java2016-12-18 16:52:03

Ans. Collections in java is a framework of classes that provides an abstracted data structure to store and manipulate the group of objects. Each class is unique in the way it stores , search , sort and modify the elements.

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   Like      Discuss      Correct / Improve     collections  collection classes     Infoview Technologies      Basic        frequent


 Q14. Write a Program to print the positive and negative numbers separetlyCore Java2016-12-18 16:53:56

 This question was recently asked at 'Infoview Technologies'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     code  program  coding     Infoview Technologies


 Q15. Does java supports operator overloading ?2017-01-09 09:40:40

Ans. No

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   Like      Discuss      Correct / Improve          IVTL InfoView Technologies      basic


 Q16. Which class is the root class of all Exceptions in Java ?2017-01-09 09:41:53

Ans. Throwable

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   Like      Discuss      Correct / Improve          IVTL InfoView Technologies      basic        frequent




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