Recall & Review
beginner
What does 'Delete Node at Beginning' mean in a linked list?
It means removing the first node of the linked list and updating the head pointer to the next node.
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beginner
What happens to the head pointer when you delete the first node in a linked list?
The head pointer is updated to point to the second node in the list, which becomes the new first node.
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intermediate
Why is it important to free the deleted node in C after deleting it from the linked list?
To release the memory allocated to that node and avoid memory leaks in the program.
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beginner
What should you check before deleting the first node in a linked list?
You should check if the list is empty (head is NULL) to avoid errors when deleting.
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beginner
In C, which function is used to free the memory of a deleted node?
The free() function is used to release the memory allocated to the node.
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What is the first step when deleting the first node of a linked list?
✗ Incorrect
The head pointer must be updated to the second node before freeing the first node.
What should you do if the linked list is empty when trying to delete the first node?
✗ Incorrect
If the list is empty (head is NULL), there is no node to delete.
After deleting the first node, what does the head pointer point to?
✗ Incorrect
The head pointer moves to the second node, which becomes the new first node.
Which C function is used to release memory of a deleted node?
✗ Incorrect
free() releases allocated memory to avoid leaks.
What happens if you forget to free the deleted node's memory?
✗ Incorrect
Not freeing memory causes memory leaks, wasting resources.
Explain step-by-step how to delete the first node in a singly linked list in C.
Think about what happens to the head pointer and memory.
You got /4 concepts.
Why is it important to update the head pointer before freeing the first node?
Consider what happens if head is freed first.
You got /4 concepts.