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Interview Questions and Answers for 'Conduent' - 3 question(s) found - Order By Newest

Very frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q1. What is the difference between ArrayList and LinkedList ?Core Java
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

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   Like         Discuss         Correct / Improve     collections   java   data structures   arraylist   linkedlist   arraylist vs linkedlist     Asked in 61 Companies      Basic        frequent

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Related Questions

 If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ?
 In a Linked list with sorted numbers, insert a new numbers while maintaining the sort order.
  Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?
 Collections.sort can only be performed on ..

a. Set
b. List
c. Map
d. Any Collection implementation
 Is this a valid initialization ? Explain.

Collection<Collection> collection = new LinkedList<LinkedList>();
  What is the difference between List, Set and Map ?

or

What are the different Java Collections Interfaces ?
  Difference between Vector and ArrayList ?
  Overridden methods must have the same ...
  Which of the following doesn't extend Collection interface ?


Very frequently asked.Usually among first few questions.
  Q2. What is MVC ? Design
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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   Like         Discuss         Correct / Improve     j2ee   mvc   mvc design pattern   design pattern   struts   spring   web application   web frameworks   ebay     Asked in 60 Companies      basic        frequent

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Related Questions

  Explain Flow of Spring MVC ?
  What are the benefits of using Spring Framework ?
  Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ?
  What bean scopes does Spring support? Explain them.
  Which MVC is struts2 based on ?
  What are different modules of spring ?
  What is Spring configuration file?
  Q: What is default scope of bean in Spring framework?
  What is bean auto wiring?


Frequently asked in high end product companies. Frequently asked in Deloitte.
  Q3. How is Hashmap internally implemented in Java ?Core Java
Ans. https://www.quora.com/How-is-Hashmap-in-Java-implemented-internally-What-are-the-pros-and-cons-to-use-it-What-are-the-complexities-it-provides-for-insert-delete-and-lookup/answer/Anshudeep-Bajpai?srid=iwnK

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   Like         Discuss         Correct / Improve     hashmap  collections  hashmap internal implementation     Asked in 20 Companies      expert        frequent


Related Questions

  Difference between HashMap and Hashtable?
  Difference between TreeMap and HashMap ?
  Can you provide some implementation of a Dictionary having large number of words ?
  What is a ConcurrentHashMap ?
  Can we use null as a key for a map collection ?
  Which of the following collections stores its elements in insertion Order ?

a. HashMap
b. TreeMap
c. LinkedHashMap
d. LinkedMap
 Why HashTable has been deprecated ?
  Difference between Map and HashMap ?
  Can we add duplicate keys in a HashMap ? What will happen if we attempt to add duplicate values ?



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