WGU C949 Objective Assessment 2026/2027 Data Structures and Algorithms I Version 2 Questions and

WGU C949 Objective Assessment ( 2026/2027) Data Structures and Algorithms I Version 2 Questions and Answers

WGU C949 Objective Assessment (

2026/2027) Data Structures and Algorithms I

Version 2 Questions and Answers

Q: Which data structure is used to implement a priority queue?

a. Queue b. Stack c. Heap

d. Linked List

Answer:

Heap

Q: Which sorting algorithm has the best worst-case time complexity of O(n log n)?

a. Bubble Sort b. Merge Sort

c. Selection Sort

d. Insertion Sort

Answer:

Merge Sort

Q: In a binary search tree (BST), what is the property of the right child compared to the parent

node?

a. It is greater than the parent node. b. It is less than the parent node.

c. It is equal to the parent node.

d. There is no specific relationship.

Answer:

It is greater than the parent node.

Q: Which data structure is suitable for implementing a stack?

a. Array

b. Linked List c. Hash Table

d. Heap

Answer:

Linked List

Q: Which algorithm is used to find the minimum spanning tree in a weighted graph?

a. Breadth-First Search (BFS)

b. Depth-First Search (DFS)

c. Dijkstra's Algorithm

d. Prim's Algorithm

Answer:

Prim's Algorithm

Q: Which data structure allows efficient insertion, deletion, and retrieval op- erations with a

time complexity of O(1)?

a. Array

b. Linked List c. Hash Table

d. Stack

Answer:

Hash Table

Q: Which sorting algorithm works by repeatedly finding the maximum ele- ment and moving it

to the end?

a. Bubble Sort b. Quick Sort

c. Insertion Sort

d. Merge Sort

Answer:

Bubble Sort

Q: Which data structure is used to represent a hierarchical relationship be- tween elements with

a single parent and multiple children?

a. Stack b. Queue

c. Linked List d. Tree

Answer:

Tree

Q: Which algorithm is used to traverse a binary tree in a post-order manner?

a. Depth-First Search (DFS)

b. Breadth-First Search (BFS)

c. Preorder Traversal

d. Postorder Traversal

Answer:

Postorder Traversal

Q: What is the purpose of analyzing algorithms?

a. To understand their implementation details b. To determine their runtime complexity

c. To optimize their memory usage

d. To improve their user interface

Answer:

To determine their runtime complexity

Q: Which of the following is NOT a characteristic of an algorithm?

a. Finiteness

b. Determinism c. Adaptability

d. Input and Output

Answer:

Adaptability

Q: What is the worst-case time complexity of a linear search algorithm?

a. O(1)

b. O(log n)

c. O(n)

d. O(n^2)