Recall & Review
beginner
What is a linked list?
A linked list is a chain of nodes where each node holds data and a link (pointer) to the next node. It is like a treasure hunt where each clue leads to the next.
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beginner
How do you find the length of a linked list?
Start at the first node and move to the next node one by one, counting each node until you reach the end (where the next pointer is NULL). The count is the length.
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beginner
What does the 'NULL' pointer represent in a linked list?
NULL means there is no next node. It marks the end of the linked list, like a 'The End' sign in a story.
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beginner
Why do we use a loop to get the length of a linked list?
Because we need to visit each node one by one until the end. A loop helps us repeat this step easily without missing any node.
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intermediate
What is the time complexity of getting the length of a linked list?
It is O(n), where n is the number of nodes. We must check each node once to count them all.
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What does the length of a linked list represent?
✗ Incorrect
The length is the count of all nodes in the linked list.
What condition tells us we reached the end of a linked list?
✗ Incorrect
The next pointer being NULL means no more nodes follow.
Which loop is commonly used to traverse a linked list?
✗ Incorrect
A while loop is used to move through nodes until NULL is found.
If a linked list has 5 nodes, what will the length function return?
✗ Incorrect
The length is the total number of nodes, which is 5.
What is the initial value of the count variable when finding length?
✗ Incorrect
Count starts at 0 before counting nodes.
Explain step-by-step how to find the length of a linked list.
Think of walking through a chain counting each link.
You got /5 concepts.
Why is it important to check for NULL when traversing a linked list?
NULL is like a stop sign on the path.
You got /4 concepts.