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| General - Interview Questions and Answers for 'Cerner' - 5 question(s) found - Order By Newest | |||||||||||||||||||||||||||
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| 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 protection 4. Polymorphism for flexibility and interfacing | |||||||||||||||||||||||||||
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 Discuss Correct / Improve  oops oops features  Asked in 235 Companies  basic  frequent | |||||||||||||||||||||||||||
 Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. | |||||||||||||||||||||||||||
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| 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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| Discuss Correct / Improve collections java data structures arraylist linkedlist Asked in 61 Companies Basic frequent | |||||||||||||||||||||||||||
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| 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 | |||||||||||||||||||||||||||
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| Discuss Correct / Improve polymorphism object oriented programming (oops) oops concepts oops concepts Asked in 107 Companies Basic frequent | |||||||||||||||||||||||||||
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| Ans. [Open Ended Answer] | |||||||||||||||||||||||||||
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| Discuss Correct / Improve elsevier open ended questions overstock.com cerner Asked in 15 Companies frequent | |||||||||||||||||||||||||||
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| Ans. [Open Ended Answer] The objective of the question is to check how efficient one is in the language so that appropriate level questions are asked. Don't tell too high number if you are being interviewed for a junior or mid level position as the interviewer may throw advance level questions. | |||||||||||||||||||||||||||
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What will be the output of exceuting main method ?
