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| Core java - Interview Questions and Answers for 'Sears' - 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 ) and Epam Systems | |||||||||||
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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 == vs equals equals vs ==  Asked in 294 Companies  basic  frequent | |||||||||||
 Try 6 Question(s) Test | |||||||||||
| Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant | |||||||||||
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| Ans. Object that can't be changed after instantiation. | |||||||||||
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| Discuss Correct / Improve java oops immutable immutability Asked in 27 Companies basic frequent | |||||||||||
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| Ans. public class BuggyBread { public static void main(String args[]) { System.out.println(factorial(5)); } private static int factorial(int number){ if(number == 1){ return 1; } else { return number * factorial(number - 1); } } } | |||||||||||
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| Discuss Correct / Improve recursion Asked in 25 Companies | |||||||||||
| Frequently asked in face to face interviews. | |||||||||||
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| Ans. int count = 15; int[] fibonacci = new int[count]; fibonacci[0] = 0; fibonacci[1] = 1; for(int x=2; x < count; x++){ fibonacci[x] = fibonacci[x-1] + fibonacci[x-2]; } for(int x=0; x< count; x++){ System.out.print(fibonacci[x] + " "); } | |||||||||||
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| Discuss Correct / Improve ebay fibonacci series Asked in 66 Companies basic frequent | |||||||||||
| Frequently asked to Fresh graduates. | |||||||||||
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| Ans. http://algs4.cs.princeton.edu/11model/BinarySearch.java.html | |||||||||||
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| Discuss Correct / Improve binary search search Asked in 5 Companies basic frequent | |||||||||||
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| Ans. Yes its useless if we are not going to use its objects within Hash collection, For example - HashSet , HashMap. HashCode is used internally by these collections for Search. | |||||||||||
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| Discuss Correct / Improve hashcode hash collections search | |||||||||||
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Which of the following statement is not true ?
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