Creating a Singly Linked List from Scratch in DSA C - Revision Summary

Recall & Review

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What is a singly linked list?

A singly linked list is a chain of nodes where each node holds data and a link (pointer) to the next node. The last node points to NULL, showing the end of the list.

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What does each node in a singly linked list contain?

Each node contains two parts: the data (value) and a pointer to the next node in the list.

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How do you create a new node in C for a singly linked list?

You define a struct with data and a pointer to the same struct type. Then use malloc to allocate memory for a new node.

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Why does the last node in a singly linked list point to NULL?

NULL marks the end of the list so we know there are no more nodes after it.

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What is the role of the 'head' pointer in a singly linked list?

The head pointer points to the first node of the list. It is the starting point to access all nodes.

What does the 'next' pointer in a singly linked list node point to?

A NULL always

B The previous node in the list

C The head of the list

D The next node in the list

The 'next' pointer always points to the next node in the list, or NULL if it is the last node.

How do you allocate memory for a new node in C?

A Using malloc() function

B Using free() function

C Using printf() function

D Using scanf() function

malloc() allocates memory dynamically for a new node.

What is the initial value of the 'next' pointer when creating a new node?

A NULL

B Head pointer

C Random memory address

D Data value

When a new node is created, its 'next' pointer is set to NULL to mark the end of the list.

Which part of the linked list stores the actual data?

A Tail pointer

B Next pointer

C Data field in the node

D Head pointer

The data field inside each node stores the actual value.

What does the head pointer represent in a singly linked list?

A The middle node in the list

B The first node in the list

C The last node in the list

D A temporary node

The head pointer points to the first node, which is the entry point to the list.

Explain how to create a singly linked list node from scratch in C.

Think about the structure and memory allocation steps.

Describe the role of the head pointer and next pointers in a singly linked list.

Consider how you move through the list starting from head.