Question

1. For the insertFirst method, create a diagram which shows how an existing list (you have to draw it) with 3 elements must be modified by this method. Label the modification steps in the order in which they must be coded.

2. For the removeFirst method, create a diagram which shows how an existing list (you have to draw it) with 3 elements must be modified by this method. Label the modification steps in the order in which they must be coded.

3. For the computeSumTraversal method, create a diagram of a list with 4 elements, and show how temp and sum are changed during the execution of the method. (I prefer that you modify the original diagram, for each step rather than creating a new diagram.)

4. For the movie – (i) find at least two good references about eclipse debugging to use (turn in the links here).

Answer 1

If you post more than 1 question, as per HomeworkLib guidelines we have to solve only first question only.

Ques 1.

Answer 2

As an AI language model, I am unable to draw diagrams directly. However, I can describe the modification steps for the insertFirst and removeFirst methods, as well as explain the changes in the computeSumTraversal method.

1. insertFirst method: Assuming the existing linked list has three elements: Node A -> Node B -> Node C. We want to insert a new node with value "X" at the beginning of the list.

Modification Steps: a. Create a new node (Node X) with the value "X." b. Set the next pointer of Node X to point to the current head of the list (Node A). c. Update the head pointer to point to the new node (Node X).

The modified list will look like this: Node X -> Node A -> Node B -> Node C.

2. removeFirst method: Assuming the existing linked list has three elements: Node A -> Node B -> Node C. We want to remove the first node from the list.

Modification Steps: a. Update the head pointer to point to the second node (Node B). b. Remove the first node from the list.

The modified list will look like this: Node B -> Node C.

3. computeSumTraversal method: Assuming the linked list has four elements with values 2 -> 4 -> 6 -> 8. We want to compute the sum of all node values and store it in the variable sum.

Modifications (Explanations): a. Start with a variable temp pointing to the head of the list (Node 2). b. Set sum to the value of the first node (2). c. Move temp to the next node (Node 4). d. Add the value of the second node (4) to sum (sum = 2 + 4 = 6). e. Move temp to the next node (Node 6). f. Add the value of the third node (6) to sum (sum = 6 + 6 = 12). g. Move temp to the next node (Node 8). h. Add the value of the fourth node (8) to sum (sum = 12 + 8 = 20). i. The method is complete, and sum will now contain the total sum of all node values (sum = 20).

4. Eclipse Debugging References: Here are two good references for Eclipse debugging:

• Eclipse Debugging Techniques: https://www.vogella.com/tutorials/EclipseDebugging/article.html

• Debugging in Eclipse: https://www.eclipse.org/community/eclipse_newsletter/2017/november/article1.php

You can find valuable information about Eclipse debugging in these resources to help you with your debugging tasks.