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| Interview Questions and Answers for 'Experis' - 6 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 ) | |||||
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| 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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 Discuss Correct / Improve  java string comparison string object class == equals object equality operator  Asked in 292 Companies  basic  frequent | |||||
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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 237 Companies basic frequent | |||||
| Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews. | |||||
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| 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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| Discuss Correct / Improve java classes abstract class interfaces Asked in 80 Companies basic frequent | |||||
| Very frequently asked. Usually difference between String,StringBuffer and StringBuilder is asked in different variations. | |||||
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| Ans. StringBuffer is synchronized whereas StringBuilder is not. | |||||
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| Discuss Correct / Improve java string stringbuffer string class stringbuilder synchronized basic interview question infosys technologies Asked in 17 Companies basic frequent | |||||
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| Ans. https://www.geeksforgeeks.org/check-for-balanced-parentheses-in-an-expression/ | |||||
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| Discuss Correct / Improve string code coding Asked in 14 Companies | |||||
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| Ans. Abstraction, Encapsulation, Polymorphism , Composition and Inheritance | |||||
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| Discuss Correct / Improve core oops concepts Asked in 65 Companies basic frequent | |||||
Which of the following statement is not true ?
