Traversal and Printing a Linked List in DSA C - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of traversing a linked list?

To visit each node in the linked list one by one, usually to read or process the data stored in each node.

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In a singly linked list, how do you move from one node to the next during traversal?

By following the 'next' pointer/reference stored in the current node to reach the next node.

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What condition is used to stop traversing a linked list?

When the current node pointer becomes NULL, meaning there are no more nodes to visit.

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Why is it important to check if the head of the linked list is NULL before traversal?

Because a NULL head means the list is empty, so there are no nodes to traverse or print.

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What is the output format when printing a linked list like 1 -> 2 -> 3 -> NULL?

It shows the data in each node separated by arrows (->) pointing to the next node, ending with NULL to indicate the list end.

What does the 'next' pointer in a linked list node represent?

A The address of the next node

B The data stored in the node

C The address of the previous node

D The size of the node

The 'next' pointer stores the address of the next node in the list, allowing traversal.

When traversing a linked list, what indicates you have reached the end?

A The current node's data is zero

B The current node's next pointer is NULL

C The current node's next pointer points to head

D The current node is the first node

A NULL next pointer means there is no next node, so traversal ends.

Which of these is the correct way to start traversing a linked list?

A Start from the last node

B Start from the middle node

C Start from the head node

D Start from a NULL pointer

Traversal always starts from the head node of the linked list.

What happens if you try to traverse a linked list with a NULL head?

A You traverse all nodes

B You traverse nodes in reverse

C You traverse only the last node

D You get an error or no output because the list is empty

A NULL head means the list is empty, so traversal cannot proceed.

How do you print the data of each node during traversal?

A Print the data and move to the next node until NULL

B Print only the head node data

C Print the data of the last node only

D Print the data in reverse order

You print each node's data and move to the next node until you reach NULL.

Explain step-by-step how to traverse and print all elements of a singly linked list.

Think about visiting each node one by one until the end.

Describe what the output looks like when printing a linked list with nodes containing 5, 10, and 15.

Visualize the chain of nodes connected by arrows.