elements of programming interview python

Upon reaching the node we want to remove, we point the previous node to the node after the target node and remove the target node: removeNode(Node node)Ĭomparing Strings Represented as Linked Lists Interview Question What we have to do here is traverse the list, keeping track of the node previous from the node we want to remove. Let's take a look at the pseudo code: insertAtPosition(list, node, newNode) There are a few ways someone can ask you to do this: Let's start off with a simple task - inserting a node into a list. Insert an element (6) on the 2nd position in the following list: 2->4->5->3->7->0 Remove the 4th element from the following list: 2->4->5->3->7->0 Inserting and Removing Nodes Interview Question Need help studying for your interview? We recommend trying a service like Daily Coding Problem, which will email you practice questions daily.

Circular Linked Lists - Instead of containing a null pointer at the end of the list, the last node in these lists contains a pointer to the first node, making them circular.Īs the linked list is one of the most basic, and important, data structures in computer science, we've compiled a list of common interview questions regarding linked lists for this article.Doubly Linked Lists - This kind of Linked List contains both a pointer to the next, but also a pointer to the previous node in the list.The nodes in Singly Linked Lists contain a pointer to the next node in the list. Singly Linked Lists - A classic linked list, like the one shown in the picture above.

Elements of programming interview python