Push Using Linked List Node in DSA Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new node with the given data.

DSA Python

new_node = Node([1])

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

Adata

Bnext

Chead

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'next' instead of the data value.

Passing 'head' which is the start of the list, not the new data.

We pass the data value to the Node constructor to create a new node with that data.

2fill in blank

medium

Complete the code to link the new node to the current head of the list.

DSA Python

new_node.[1] = head

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

Adata

Bprev

Cvalue

Dnext

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'data' or 'value' instead of 'next'.

Trying to assign to 'prev' which is not used in singly linked list.

The 'next' pointer of the new node should point to the current head to insert it at the front.

3fill in blank

hard

Fix the error in updating the head to point to the new node.

DSA Python

head = [1]

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

Anew_node.next

BNone

Cnew_node

Dhead.next

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning head to new_node.next which skips the new node.

Assigning head to None which empties the list.

After linking, the head must be updated to the new node to reflect the new start of the list.

4fill in blank

hard

Fill both blanks to complete the push function that adds a new node at the front.

DSA Python

def push(head, data):
    new_node = Node([1])
    new_node.[2] = head
    head = new_node
    return head

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

Adata

Bnext

Cprev

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'prev' instead of 'next' for linking.

Passing wrong variable to Node constructor.

We create a new node with the data, link its next to head, then update head to new_node.

5fill in blank

hard

Fill all three blanks to complete the push function with variable names and pointer updates.

DSA Python

def push([1], [2]):
    new_node = Node([2])
    new_node.[3] = [1]
    [1] = new_node
    return [1]

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

Ahead

Bdata

Cnext

Dnew_node

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing variable names in parameters and inside function.

Using wrong pointer name instead of 'next'.

The function takes head and data, creates new_node with data, links new_node.next to head, updates head to new_node, and returns head.