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Capgemini


   




Interview Questions and Answers for 'Capgemini' - 27 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

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  Q2. 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

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 Q3. What will this code print ?

String a = new String ("TEST");
String b = new String ("TEST");
if(a == b) {
System.out.println ("TRUE");
} else {
System.out.println ("FALSE");
}
Core Java
Anonymous
Ans. FALSE. == operator compares object references, a and b are references to two different objects, hence the FALSE. .equals method is used to compare string object content.

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Frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q4. What are the methods of Object Class ?Core Java
Anonymous
Ans. clone() - Creates and returns a copy of this object.

equals() - Indicates whether some other object is "equal to" this one.

finalize() - Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

getClass() - Returns the runtime class of an object.

hashCode() - Returns a hash code value for the object.

toString() - Returns a string representation of the object.

notify(), notifyAll(), and wait() - Play a part in synchronizing the activities of independently running threads in a program.

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Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)
  Q5. Describe, in general, how java's garbage collector works ?Core Java
Anonymous
Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.

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Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.
  Q6. 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.

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  Q7. Difference between Vector and ArrayList ?Core Java
Anonymous
Ans. Vectors are synchronized whereas Array lists are not.

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Very frequently asked.Usually among first few questions.
  Q8. What is MVC ? Design
Anonymous
Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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Very Frequently asked. Usually asked along with String Class related questions.
  Q9. 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.

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Very frequently asked if being interviewed for hibernate. Frequently asked in Tata Consultancy (TCS) and Overstock.com
  Q10. Difference between load and get ?Hibernate
Admin
info@buggybread.com
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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  Q11. 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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  Q12. what is the difference between collections class vs collections interface ?Core Java
Admin
info@buggybread.com
Ans. Collections class is a utility class having static methods for doing operations on objects of classes which implement the Collection interface. For example, Collections has methods for finding the max element in a Collection.

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 Q13. What is Criteria in Hibernate ?Hibernate
Admin
info@buggybread.com
Ans. Criteria is a simplified API for retrieving entities by composing Criterion objects.

For example - session.createCriteria(Employee.class).add( Restrictions.like("name", "A%") ).list();

will return all employee objects having name starting with A.

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 Q14. Have you ever had any conflict with the team member (like disagreement on some design decision ) and How you reacted to it ? General2016-11-30 15:55:39

Ans. [Open Ended Answer]

This is a very sensitive question and should be dealt with caution. Just simply saying that you never had any disagreement will present you as dumb team member. Showing your self as too aggressive in such decisions will present you as a trouble maker. You should present a situation where you had an argument / disagreement but eventually you and your team mates mutually found a way out of it.

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 Q15. What is the use of Synchronized block ?Core Java

Ans. The goal of a synchronised block is to achieve mutual exclusion i.e at one time, the segment of the code should be executed by single thread only and hence the lock needs to be retrieved before executing the segment and then released.

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 Q16. Write code for constructor overloadingCore Java

Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?&category=code&searchOption&keyword=965

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  Q17. Difference between Array and ArrayList ?Core Java2016-12-15 14:13:12

Ans. <a href="http://javahungry.blogspot.com/2015/03/difference-between-array-and-arraylist-in-java-example.html" rel="nofollow">http://javahungry.blogspot.com/2015/03/difference-between-array-and-arraylist-in-java-example.html</a>

  Sample Code for ArrayList

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 Q18. What is a Webdriver ?Testing2017-02-02 08:25:41

Ans. Selenium WebDriver is a tool for automating web application testing.It helps in replicating the manual tester behavior like keyboard entry, mouse events etc and then matching the output against the expected.

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 Q19. Is ICICI netbanking using webservices?Web Service2017-10-13 09:21:39

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


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 Q20. What is abstraction ?2017-10-13 09:23:38

Ans. Abstraction is a process of hiding the implementation details and describing only the functionality to the user.

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 Q21. Explain JVM architecture.Core Java2017-12-26 10:12:51

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


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 Q22. How one dao Implementation object (singleton) can handle multiple requests?Design Pattern2018-01-05 15:26:31

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


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   Like      Discuss      Correct / Improve     singleton     Capgemini


 Q23. Can we modify a list while iterating it ?Core Java2018-01-30 18:25:33

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


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 Q24. What are the ways to break singleton pattern ?Design2018-04-08 11:16:57

Ans. If we don't have double checked locking, it can be broken easily through multi threaded access.

Through Reflection.

If multiple class loaders are loading the class.

If the class is serializable or cloneable.


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   Like      Discuss      Correct / Improve     singleton     Capgemini      expert


 Q25. What sets you apart from other developers ?

or

What are the distinguished qualities you have ?
General2018-07-19 21:15:01

 This question was recently asked at 'AECOM, Zillow,Tuff Shed,Mobiquity,Unbounce,Globe Co,Aequilibrium,Salesforce,QQ Solutions,Accenture,HCL Technologies,Integration Point,JDS Development Group,Intellinet,Dice,Link advantage,Indecomm Global Services,Schneider Electric,Regus,Golden State Warriors,WhatFix,MobileNow,Systemax,BASF,Mouser Electronics,Steinhafels,Yardi Systems,Colliers International,Nintendo of America,Morgan Stanley,Capgemini'.This question is still unanswered. Can you please provide an answer.


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 Q26. What is reentrant lock ?2018-10-19 14:32:18

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


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 Q27. Explain Hibernate caching mechanismHibernate2018-11-14 12:53:50

 This question was recently asked at 'Infosys,Sabre,Sapient,HCL Technologies,Thomson Reuters,Capgemini,FINRA,abhra,Ephesoft,Ananth Technologies,Verizon,Azuga,UrbanPro,Indecomm Global Services,The Digital Group,mPHATEK systems,Cakesoft Technologies,GoldenSource Corporation,Synechron,Clear2Pay,Rigil,Azuga,GGK Technologies system'.This question is still unanswered. Can you please provide an answer.


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