![]() What is a Queue?Ī Queue is a linear data structure that follows the First-In-First-Out (FIFO) principle, meaning that the first element added to the queue will be the first one to be removed. The primary operations on a stack are push (adding an element), pop (removing the top element), and peek (viewing the top element without removing it). What is a Stack?Ī Stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle, meaning that the last element added to the stack will be the first one to be removed. Merge the sorted halves back together and return the result.Ĭode language: PHP ( php ) 4. Recursively apply Merge Sort to both halves.Ĥ. ![]() If the array has one or zero elements, return the array (base case).ģ. The algorithm has a time complexity of O(log n).ġ. It repeatedly divides the search interval in half until the target value is found or the interval is empty. Explain the Binary Search algorithm.īinary Search is an efficient searching algorithm that works on sorted arrays or lists. In Java, the HashMap class is an implementation of a Hash Table. This allows for efficient insertion, deletion, and search operations with average-case time complexity of O(1). It uses a hash function to map keys to their corresponding indices in an array.
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