Core Java - Interview Questions and Answers for 'Hash collections' - 3 question(s) found - Order By Newest Q1. Name few Hash collections classes and interfaces ?
Ans. http://www.buggybread.com/2015/01/java-hash-collections-classes-and.html Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Related Questions What is the difference between ArrayList and LinkedList ? If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ? Difference between HashMap and Hashtable? Difference between TreeMap and HashMap ? Can you provide some implementation of a Dictionary having large number of words ? Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ? What is a ConcurrentHashMap ? Collections.sort can only be performed on .. Why HashTable has been deprecated ? Difference beween HashSet and TreeSet ? Q2. What is collision in hash collections ? Core Java
Ans. Collision is the situation when two different elements have the same Hash Code. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies intermediate frequent Related Questions What is the difference between ArrayList and LinkedList ? If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ? Can you provide some implementation of a Dictionary having large number of words ? In a Linked list with sorted numbers, insert a new numbers while maintaining the sort order. Design a Data Structure for a full text Search ? Write a program for LinkedList, with method to append node and traversing the list ? What is the difference between Data Type and Data Structure ? Do you see Class as a Data Type or Data Structure ? How to determine if the linked list has a cycle in it ? Which Data Structure should be used for Load Balancer ? Q3. Do you feel that its useless to define hashCode method for a class ? Core Java
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. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Related Questions Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object? Write a class and override the equals and hashcode method ? How many threads can access a concurrent hashmap when the hashcode is overridden and always returns a zero.
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