On a clean sheet of paper, draw the three (3) types of linked list. Make sure the elements or nodes are related to each other.

Since I cannot draw images directly, I can describe how to represent the three types of linked lists graphically, and you can use this description to create your own drawings.

1. Singly Linked List

• Structure: Each node has two parts: data and a pointer to the next node.
• Representation:
  • Draw a series of boxes connected by arrows.
  • Each box should contain two sections: the data (e.g., 1, 2, 3) and an arrow pointing to the next box.
  • The last box should point to null or can be left without an arrow.

Example:

[ 1 | * ] -> [ 2 | * ] -> [ 3 | * ] -> null

2. Doubly Linked List

• Structure: Each node contains three parts: a pointer to the previous node, data, and a pointer to the next node.
• Representation:
  • Draw boxes similar to the singly linked list but include an back arrow for the previous pointer.
  • The first box should have a null for the previous pointer, and the last box should point back to null.

Example:

null <- [ * | 1 | * ] <-> [ * | 2 | * ] <-> [ * | 3 | * ] -> null

3. Circular Linked List

• Structure: Similar to the singly linked list, but the last node points back to the first node instead of pointing to null.
• Representation:
  • Draw the nodes in a circular fashion.
  • Ensure the last node’s next pointer points back to the first node.

Example:

[ 1 | * ] -> [ 2 | * ] -> [ 3 | * ] 
       ^                                  |
       |__________________________________|

By following the examples above, you should be able to sketch the three types of linked lists accurately on your sheet of paper.