Data structure


The queue is an abstract data type, in which the element is inserted into the tail, and delete from the head. It stores the items using First in first out principle (FIFO). The queue can be implemented using an array or linked list. The enqueues insert an item to the tail. The dequeue removes the item from the head.

Hash table uses key and value for storing the elements. If the key has duplicate value, it may lead to hashing Collision. Separate Chaining is one of name collision solution. It is a scheme which each position in the hash table has a list to handle collisions.