COS2611 Assignment 3 memo 2024
UNISA 2024 COS2611-24-Y Assessment 3
QUIZ
Question 1
Match the following operations on a Binary Search Tree (BST) with their correct descriptions:
InsertionAdding a new node with a given value to the appropriate position in the BST while maintaining the BST properties.
Inorder
TraversalA process of visiting all nodes in a BST in ascending order of their values.
DeletionRemoving a node with a specific value from the BST while ensuring that the tree remains a valid BST.
SearchLooking for a node with a specific value in the BST and returning whether it exists or not.
Question 2
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Given the following sequence of numbers: [15, 7, 23, 4, 10, 18, 28], if you construct a binary search tree by inserting each
number in the given order, what would be the root of the resulting tree?
a. 15
b. 7
c. 23
d. 4
Clear my choiceQuestion 3
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Consider the BST:
If you perform an inorder traversal on this binary search tree, what would be the correct sequence of visited nodes?
a. 3, 5, 10, 15, 20, 25
b. 10, 5, 3, 20, 15, 25
c. 3, 5, 15, 10, 20, 25
d. 10, 5, 15, 20, 3, 25
Clear my choiceQuestion 4
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Consider the following binary search tree (BST):
If you want to delete the node with the value 7 while maintaining the BST properties, what would be the resulting tree?
a.
b.
c.
d.
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Question 5
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In the context of binary trees and tree traversal in C++, which traversal algorithm visits the nodes in the following order: left
subtree, root, right subtree?
a. Preorder traversal
b. Inorder traversal
c. Postorder traversal
d. Level-order traversal
UNISA 2024 COS2611-24-Y Assessment 3
QUIZQuestion 12
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Company XFiber, is requested by the municipality to install fiber in a new neighbourhood. The company is constrained to bury
the fiber cable only along certain paths. Some of the paths might be more expensive. The cost is represented as a weight on
the edge. You need to write a C++ program that will determine the minimum spanning tree that will represent the least
expensive path for laying the fiber cable.
To solve the above problem for Company XFibre, you may use AI (artificial intelligence) to help. As you are aware AI tools are
becoming a valuable tool to help programmers in saving valuable time in the development of code for specific problems. Use
an AI tool and generate C++ code that will implement Prim’s algorithm using ADT with a time complexity of O(n^2).
Before you continue, whatch this video:
After you have downloaded the code from the AI tool, you will need to make some changes. This is important that you add
the following in your code - without it - the project will not be marked.
1. Insert as a comment your student name and number.
2. Add as a comment the question(s) that you have asked the AI tool to generate the code.
3. Add as comments in your code, the updates and changes that you are making. This is important as the marker needs to
see your input, changes, and updates to the code to make it work for this case study.
Adapt the code to allow you to read from a text file the test data. To test your code, create a text file () as
displayed in the following image. The marker will use a different set of data to test your code. The code must read from
c:data
The first value represents the number of vertices, and the second value is the number of edges. The values thereafter
represent combinations of (vertex, edge, and weight).The output of your code should list the minimum spanning tree paths.
Example of output:
Save your C++ solution as A3P, and replace with your student number.
Upload the .cpp file.
The following rubric will be used in marking the project:Maximum file size: 50 MB, maximum number of files: 1
Files
You can drag and drop files here to add them.
Accepted file types
Text file .cpp
UNISA 2024 COS2611-24-Y Assessment 3
QUIZ
Question 6
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Match the following traversal methods with their descriptions:
Visits nodes in the order of root, left subtree, right subtree.Preorder Traversal
Visits nodes level by level, starting from the root.Breadth-First Traversal (BFS)
Visits nodes in the order of left subtree, root, right subtree.Inorder Traversal
Visits nodes in the order of left subtree, right subtree, root.Postorder Traversal
Explores as far as possible along each branch before backtracking.Depth-First Traversal (DFS)Question 7
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Given the directed graph with
vertex set V(G) = {0, 1, 2, 3, 4, 5} and
edge set E(G) = {(0,1), (1,2), (2,5), (3,1), (2,4), (4,3), (4,0)},
which of the following graphs correctly describe the relationship of the vertices for a directed graph?
a.
b.
c.
d.
Clear my choiceQuestion 8
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Given the directed graph with vertex set V(G) = {0, 1, 2, 3, 4, 5} and edge set E(G) = {(0,1), (1,2), (2,5), (3,1), (2,4), (4,3), (4,0)},
which of the following represents the adjacency matrix?
a.
b.
c.
d.
Clear my choiceQuestion 9
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Consider a scenario where you have a std::vectorint named numbers containing the values [10, 20, 30, 40, 50].
You need to use an iterator to find and print the sum of all the elements in the vector.
Which code snippet accomplishes this task correctly ?
a.
vectorint numbers = { 10,20,30,40,50 };
int sum = 0;
for (int num : numbers) {
sum += num;
}
b.
vectorint numbers = { 10,20,30,40,50 };
int sum = 0;
for (auto it = (); it != (); ++it) {
sum += *it;
}
c.
vectorint numbers = { 10,20,30,40,50 };
int sum = 0;
for (unsigned int i = 0; i (); ++i) {
sum += numbers[i];
}
d.
vectorint numbers = { 10,20,30,40,50 };
int sum = 0;
for (auto& num : numbers) {
sum += num;
}
Clear my choice
Question 10
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True or False?
In C++, iterators provide a way to access and manipulate the elements of a container without exposing the underlying data
structure.
True
FalseQuestion 11
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True or False?
In a connected graph, a minimal spanning tree is a subset of the original graph's edges that connects all the vertices while
having the lowest possible sum of edge weights.
True
False
Content preview
UNISA 2024 COS2611-24-Y Assessment 3
QUIZ
Started on Tuesday, 13 August 2024, 8:59 PM
State Finished
Completed on Wednesday, 14 August 2024, 9:20 PM
Time taken 1 day
Grade Not yet graded
Information
This is a compulsory assessment. You have one (1) attempt to complete the assessment. The system will automatically
upload your attempts when the due date and time is reached. The due date is 26 August 2024, 23:00.
Remember, the due date is the last date for submission and not the day on which you should start with the assessment.
There are 12 question in this assessment. Questions 1 - 11 are quiz questions. Question 12 is a practical project that you
have to complete and submit online.
Question 1
Correct
Mark 4.00 out of 4.00
Match the following operations on a Binary Search Tree (BST) with their correct descriptions:
Adding a new node with a given value to the appropriate position in the BST while maintaining the BST properties.
Insertion
Inorder A process of visiting all nodes in a BST in ascending order of their values.
Traversal
Removing a node with a specific value from the BST while ensuring that the tree remains a valid BST.
Deletion
Looking for a node with a specific value in the BST and returning whether it exists or not.
Search
Your answer is correct.
The correct answer is:
Insertion → Adding a new node with a given value to the appropriate position in the BST while maintaining the BST
properties.,
Inorder Traversal → A process of visiting all nodes in a BST in ascending order of their values.,
Deletion → Removing a node with a specific value from the BST while ensuring that the tree remains a valid BST.,
Search → Looking for a node with a specific value in the BST and returning whether it exists or not.
, Question 2
Correct
Mark 1.00 out of 1.00
Given the following sequence of numbers: [15, 7, 23, 4, 10, 18, 28], if you construct a binary search tree by inserting each
number in the given order, what would be the root of the resulting tree?
a. 15
b. 7
c. 23
d. 4
Your answer is correct.
The correct answer is:
15
Question 3
Correct
Mark 2.00 out of 2.00
Consider the BST:
If you perform an inorder traversal on this binary search tree, what would be the correct sequence of visited nodes?
a. 3, 5, 10, 15, 20, 25
b. 10, 5, 3, 20, 15, 25
c. 3, 5, 15, 10, 20, 25
d. 10, 5, 15, 20, 3, 25
Your answer is correct.
The correct answer is:
3, 5, 10, 15, 20, 25