Delete Node at Specific Position in DSA C - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to move the pointer to the head of the list.

DSA C

struct Node* current = [1];

Drag options to blanks, or click blank then click option'

Ahead

BNULL

Ctail

Dtemp

Attempts:

3 left

💡 Hint

Common Mistakes

Using NULL instead of head causes no traversal.

Using tail pointer will not start from the beginning.

We start from the head of the linked list to delete a node at a specific position.

2fill in blank

medium

Complete the code to move the pointer to the node before the one to delete.

DSA C

for (int i = 0; i < position - 1; i++) {
    current = current->[1];
}

Drag options to blanks, or click blank then click option'

Aparent

Bnext

Cchild

Dprev

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'prev' in singly linked list causes errors.

Using 'child' or 'parent' are invalid pointers here.

We move to the next node to reach the node before the one to delete.

3fill in blank

hard

Fix the error in updating the link to skip the deleted node.

DSA C

current->[1] = current->next->next;

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Aprev

Bchild

Cnext

Dparent

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'prev' causes compilation errors.

Using 'child' or 'parent' are invalid in this context.

We update current's next pointer to skip the node to delete.

4fill in blank

hard

Fill both blanks to correctly free the deleted node and update the list.

DSA C

struct Node* temp = current->[1];
current->[2] = temp->next;
free(temp);

Drag options to blanks, or click blank then click option'

Anext

Bprev

Cchild

Dparent

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'prev' causes errors in singly linked list.

Not freeing the node causes memory leaks.

We store the node to delete in temp, update current's next to skip it, then free temp.

5fill in blank

hard

Fill all three blanks to handle deleting the head node correctly.

DSA C

if (position == 0) {
    struct Node* temp = [1];
    [2] = [3]->next;
    free(temp);
}

Drag options to blanks, or click blank then click option'

Ahead

Dcurrent

Attempts:

3 left

💡 Hint

Common Mistakes

Not updating head causes list corruption.

Freeing before updating head causes access errors.

To delete the head node, store it in temp, move head to next node, then free temp.