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Interview Questions and Answers for 'Linkedin' - 7 question(s) found - Order By Newest

Frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q1. 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)
  Q2. 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. Usually asked in this format or as difference with interfaces / concrete classes.
  Q3. What is an abstract class ?Core Java2017-01-10 13:12:20

Ans. Abstract class is the class that is not supposed to be instantiated. The purpose of the class to only have extension to the derived class.

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   Like      Discuss      Correct / Improve     abstract class     Multivision  Starkey Hearing Technologies  Avaya  Tridium  LinkedIn  Acute Informatics      basic        frequent


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.
  Q4. What is rule regarding overriding equals and hashCode method ?Core Java
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Ans. A Class must override the hashCode method if its overriding the equals method.

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   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

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Frequently asked in high end product companies.
 Q5. Write code for LRU CacheCore Java2017-01-10 10:15:17

 This question was recently asked at 'United Health Group (UHG),Google,Zenefits,Amazon,Microsoft,SurveyMonkey,LinkedIn,Sanpdeal,MarkMonitor,Bloomberg'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     cache  LRU cache  coding  code     United Health Group (UHG)  Google  Zenefits  Amazon  Microsoft  SurveyMonkey  LinkedIn  Sanpdeal  MarkMonitor  Bloomberg      intermediate


 Q6. What is event bubbling ?JavaScript2017-05-20 15:30:41

Ans. LinkedIn

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   Like      Discuss      Correct / Improve     event bubbling  events     LinkedIn


 Q7. What is event handling ? What is event propagation ?JavaScript2017-05-20 15:32:05

Ans. LinkedIn

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   Like      Discuss      Correct / Improve     event habdling  event propagation  events     LinkedIn




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