Push Using Linked List Node in DSA C - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

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

DSA C

struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = [1];

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

Adata

BNULL

Cnode

Dnext

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning NULL or next pointer to data field.

Using an undefined variable instead of data.

We assign the given data value to the new node's data field.

2fill in blank

medium

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

DSA C

newNode->next = [1];

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

ANULL

Bhead

Cdata

DnewNode

Attempts:

3 left

💡 Hint

Common Mistakes

Setting next to NULL which breaks the list.

Setting next to newNode itself causing a cycle.

The new node's next pointer should point to the current head node.

3fill in blank

hard

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

DSA C

*head_ref = [1];

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

ANULL

Bdata

Chead

DnewNode

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning data or NULL to head_ref instead of newNode.

Assigning head which is old pointer, not new node.

The head pointer should be updated to point to the new node after insertion.

4fill in blank

hard

Fill both blanks to complete the push function that inserts a new node at the beginning.

DSA C

void push(struct Node** head_ref, int data) {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = [1];
    newNode->next = [2];
    *head_ref = newNode;
}

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

Adata

Bhead_ref

C*head_ref

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Using head_ref instead of *head_ref for next pointer.

Assigning NULL to next which loses the rest of the list.

Assign data to newNode->data and link newNode->next to the current head *head_ref.

5fill in blank

hard

Fill all three blanks to complete the push function with memory allocation, data assignment, and linking.

DSA C

void push(struct Node** head_ref, int data) {
    struct Node* newNode = (struct Node*)malloc(sizeof([1]));
    newNode->data = [2];
    newNode->next = [3];
    *head_ref = newNode;
}

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

ANode

Bdata

C*head_ref

Dstruct Node

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Node' without struct keyword in sizeof.

Assigning wrong variable to data or next pointers.

Allocate memory for struct Node, assign data to newNode->data, and link newNode->next to *head_ref.