WGU C949 Data Structures and Algorithms Exam with complete solutions

A functions whose cost scales linearly with the size of the input - Answer- O(n) Iterating over a collection of data once often indicates an ______ algorithm. (alphabet for-loop example) - Answer- O(n) A functions whose cost scales logarithmically with the input size - Answer- O(log n) Which type of function works by breaking down large problem into smaller and smaller chunks? - Answer- O(log n) As the size of the input grows the cost of the algorithm does not increase at the same rate. The overall cost of performing an operation on 1,000,000 items is only twice that of performing the operation on 1,000 items. - Answer- O(log n) A function that exhibits quadratic growth relative to the input size - Answer- O(n^2) An example of this type of function is doubly nested loop - Answer- O(n^2) Which type of function gets really expensive really quickly? - Answer- O(n^2) A function that has two inputs that contribute to growth - Answer- O(nm) An example of this type of function is when there is a nested loop that iterates of two distinct collections of data - Answer- O(nm) Are Big-O cases used in the best or worst situations? - Answer- Worst Which statement is static? readonly Contact[] contacts = new Contact[]; readonly Contact contacts = new Contacts[100]; - Answer- readonly Contact contacts = new Contacts[100]; A container where data is stored in nodes consisting of a single data item and a reference to the next node - Answer- Linked List A ______ is a container where nodes of data are linked together into a list - Answer- Linked List Linking together complex nodes into a single structure - Answer- Linked List Each link in a chain for a linked lists is called a ______ - Answer- node What two things do nodes contain? - Answer- 1. the value 2. reference to next item in the list Give a coded example on how to create a 3 chained linked list of nodes. - Answer- Node head = new Node(1); head.Next = new Node(2); head.Next.Next = new Node(3); A list where we start at the first node and follow the chain of nodes iterating over each until we get to the end - Answer- Singly Linked List A list that builds on the singly linked list by adding reverse iteration. - Answer- Doubly Linked List Give a coded example on how to create a doubly linked list - Answer- Node node1 = new Node(1); Node node2 = new Node(2); Node node3 = new Node(3); node1.Next = node2; node2.Previous = node1; node2.Next = node3; node3.Previous = node2; The first and last nodes of a doubly linked list should have a value of ______ - Answer- null Adds a value to the beginning of the list - Answer- AddHead Adds a value at the end of the linked list - Answer- AddTail Finds the first node whose value equals the provided argument - Answer- Find Returns true if the specified value exists in the list, false othe