Doubly linked list MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

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1. : What is a doubly linked list? (A) A data structure where each node points to the next node



2. : What is the time complexity of inserting an element at the beginning of a doubly linked list?



3. : Which of the following operations requires traversal in a doubly linked list?



4. : What is the time complexity of deleting the first element of a doubly linked list?



5. : In a doubly linked list, each node contains:



6. : How do you traverse a doubly linked list from the end to the beginning?



7. : Which of the following is the correct way to delete a node after a given node in a doubly linked list?



8. : What is the time complexity of searching for an element in a doubly linked list?



9. : How do you insert a new node after a given node in a doubly linked list?



10. : Which of the following is true about the head node in a doubly linked list?



11. : What is the time complexity of inserting an element at the end of a doubly linked list if the tail pointer is maintained?



12. : What is the key advantage of using a doubly linked list over a singly linked list?



13. : Which of the following operations is possible with a doubly linked list but not with a singly linked list?



14. : What is the time complexity of accessing the nth element in a doubly linked list?



15. : Which of the following statements is true about doubly linked lists?



16. : How do you find the length of a doubly linked list?



17. : In a doubly linked list, what is the term used for the last node?



18. : What happens if you try to delete a node from an empty doubly linked list?



19. : Which of the following best describes a node in a doubly linked list?



20. : How do you delete a doubly linked list?



 

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