Recall & Review
beginner
What does 'Traversal Forward' mean in a doubly linked list?
Traversal Forward means moving from the first node (head) to the last node (tail) by following the 'next' pointers in the list.
Click to reveal answer
beginner
What does 'Traversal Backward' mean in a doubly linked list?
Traversal Backward means moving from the last node (tail) to the first node (head) by following the 'prev' pointers in the list.
Click to reveal answer
intermediate
Why is a doubly linked list suitable for both forward and backward traversal?
Because each node has two pointers: one to the next node and one to the previous node, allowing easy movement in both directions.
Click to reveal answer
beginner
In C, which pointers do you use to traverse forward and backward in a doubly linked list node?
Use the 'next' pointer to traverse forward and the 'prev' pointer to traverse backward.
Click to reveal answer
beginner
What is the stopping condition when traversing forward in a doubly linked list?
Stop when the current node is NULL, meaning you reached the end of the list.
Click to reveal answer
Which pointer do you follow to move backward in a doubly linked list?
✗ Incorrect
The 'prev' pointer points to the previous node, so following it moves backward.
What is the first node called in a doubly linked list?
✗ Incorrect
The first node is called the head.
When traversing forward, what indicates the end of the list?
✗ Incorrect
The 'next' pointer being NULL means no more nodes ahead.
Which traversal direction starts at the tail node?
✗ Incorrect
Backward traversal starts at the tail and moves to the head.
In C, how do you access the next node from a current node pointer 'curr'?
✗ Incorrect
Use 'curr->next' to access the next node pointer in C.
Explain how you would traverse a doubly linked list forward and print each node's data.
Think about moving from the first node to the last using the next pointers.
You got /4 concepts.
Describe the steps to traverse a doubly linked list backward and why this is possible.
Remember the special pointer that points to the previous node.
You got /4 concepts.