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| Interview Questions and Answers for 'Naggaro' - 4 question(s) found - Order By Rating | ||||
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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 108 Companies  Basic  frequent | ||||
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| Ans. Hashcode is used for bucketing in Hash implementations like HashMap, HashTable, HashSet etc. The value received from hashcode() is used as bucket number for storing elements. This bucket number is the address of the element inside the set/map. when you do contains() then it will take the hashcode of the element, then look for the bucket where hashcode points to and if more than 1 element is found in the same bucket (multiple objects can have the same hashcode) then it uses the equals() method to evaluate if object are equal, and then decide if contain() is true or false, or decide if element could be added in the set or not. | ||||
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| Ans. private static boolean isPalindrome(String str) { if (str == null) return false; StringBuilder strBuilder = new StringBuilder(str); strBuilder.reverse(); return strBuilder.toString().equals(str); } | ||||
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| Discuss Correct / Improve java string stringbuilder stringbuilder string class code palindrome Asked in 38 Companies Basic frequent | ||||
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| Ans. JPA or Java Persistence API is a standard specification for ORM implementations whereas Hibernate is the actual ORM implementation or framework. | ||||
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Static Polymorphic in Java is achieved through .. 
