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DSA Pythonprogramming~10 mins

Insert at Middle Specific Position in DSA Python - Interactive Practice

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Practice - 5 Tasks
Answer the questions below
1fill in blank
easy

Complete the code to insert a new node at the given position in the linked list.

DSA Python
new_node.next = current[1]
Drag options to blanks, or click blank then click option'
A.prev
B.next.next
C.next
D.prev.next
Attempts:
3 left
💡 Hint
Common Mistakes
Using .prev instead of .next causes incorrect linking.
Skipping the next pointer leads to broken list connections.
2fill in blank
medium

Complete the code to move to the node just before the insertion position.

DSA Python
for _ in range([1] - 1):
    current = current.next
Drag options to blanks, or click blank then click option'
Aposition
Bpos
Cindex
Dcount
Attempts:
3 left
💡 Hint
Common Mistakes
Using an undefined variable like 'index' or 'count'.
Looping the wrong number of times.
3fill in blank
hard

Fix the error in the insertion code to correctly update the current node's next pointer.

DSA Python
current.next = [1]
Drag options to blanks, or click blank then click option'
Anew_node
Bnew_node.next
Ccurrent
DNone
Attempts:
3 left
💡 Hint
Common Mistakes
Assigning current.next to new_node.next breaks the link.
Assigning current.next to None removes the rest of the list.
4fill in blank
hard

Fill both blanks to complete the insertion logic inside the linked list.

DSA Python
new_node.next = current[1]
current[2] = new_node
Drag options to blanks, or click blank then click option'
A.next
B.prev
C.next.next
D.prev.next
Attempts:
3 left
💡 Hint
Common Mistakes
Using '.prev' breaks the forward link.
Mixing '.next' and '.prev' causes errors.
5fill in blank
hard

Fill all three blanks to create a function that inserts a node at a specific position in a singly linked list.

DSA Python
def insert_at_position(head, data, position):
    new_node = Node(data)
    if position == 0:
        new_node.next = head
        return new_node
    current = head
    for _ in range([1] - 1):
        current = current.next
    new_node.next = current[2]
    current[3] = new_node
    return head
Drag options to blanks, or click blank then click option'
Aposition
B.next
D.prev
Attempts:
3 left
💡 Hint
Common Mistakes
Using '.prev' instead of '.next' breaks the list.
Incorrect loop variable causes wrong insertion point.