Non-Linear Data Structures MCQs

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1. : What is a non-linear data structure?
(A) Data elements are arranged in a sequential manner
(B) Data elements are arranged in a hierarchical manner
(C) Data elements are not arranged in a sequence
(D) None of the above

2. : Which of the following is an example of a non-linear data structure?
(A) Array
(B) Stack
(C) Tree
(D) Queue

3. : What type of tree has a maximum of two children per node?
(A) Binary Tree
(B) AVL Tree
(C) B-Tree
(D) Red-Black Tree

4. : What is the time complexity of searching for an element in a balanced binary search tree?
(A) O(n)
(B) O(log n)
(C) O(n log n)
(D) O(1)

5. : Which of the following traversal methods is used for trees?
(A) Linear Search
(B) Pre-order
(C) Random Access
(D) None of the above

6. : What is the height of a binary tree with n nodes in the worst case?
(A) O(log n)
(B) O(n)
(C) O(n log n)
(D) O(1)

7. : In a binary search tree, the left subtree of a node contains only nodes with values…
(A) Greater than the node
(B) Equal to the node
(C) Less than the node
(D) None of the above

8. : Which of the following trees is self-balancing?
(A) Binary Tree
(B) B-Tree
(C) AVL Tree
(D) None of the above

9. : What is the primary characteristic of a heap?
(A) Every node has at most two children
(B) It is a complete binary tree
(C) The parent node is always larger than its children (Max Heap)
(D) All of the above

10. : What is the time complexity for inserting an element in a binary heap?
(A) O(1)
(B) O(log n)
(C) O(n)
(D) O(n log n)

11. : What is the maximum number of nodes at level k in a binary tree?
(A) k
(B) 2^k
(C) 2^(k-1)
(D) 2k

12. : Which of the following is a characteristic of a B-Tree?
(A) Nodes can have multiple children
(B) It is always a binary tree
(C) It is unbalanced
(D) None of the above

13. : What type of tree allows for efficient searching and insertion in logarithmic time?
(A) Binary Tree
(B) Binary Search Tree
(C) AVL Tree
(D) All of the above

14. : What is the primary purpose of a trie data structure?
(A) Storing integers
(B) Storing strings efficiently
(C) Sorting numbers
(D) None of the above

15. : What is the worst-case time complexity for searching in a binary search tree?
(A) O(log n)
(B) O(n)
(C) O(n log n)
(D) O(1)

16. : Which traversal method visits all nodes of a binary tree?
(A) Pre-order
(B) In-order
(C) Post-order
(D) All of the above

17. : What is the main difference between a binary tree and a binary search tree?
(A) Number of children per node
(B) Order of elements
(C) Height
(D) None of the above

18. : What is the average-case time complexity for deleting a node from a binary search tree?
(A) O(n)
(B) O(log n)
(C) O(n log n)
(D) O(1)

19. : In a red-black tree, what is the maximum height relative to the number of nodes?
(A) log n
(B) 2 log n
(C) n
(D) n log n

20. : What type of tree is used in databases to allow fast data retrieval?
(A) Binary Tree
(B) B-Tree
(C) AVL Tree
(D) Red-Black Tree

21. : What is the primary characteristic of a leaf node in a tree?
(A) It has no children
(B) It has two children
(C) It can only have one child
(D) None of the above

22. : Which data structure is best suited for implementing priority queues?
(A) Stack
(B) Queue
(C) Heap
(D) Linked List

23. : What is the main advantage of a self-balancing binary search tree?
(A) Faster insertion
(B) Lower memory usage
(C) Maintains O(log n) height
(D) Simplicity

24. : Which of the following is true for a full binary tree?
(A) All nodes have zero or two children
(B) All nodes have one child
(C) It has a height of n
(D) None of the above

25. : What is the depth of a binary tree?
(A) Number of nodes
(B) Number of edges from the root to the deepest leaf
(C) Number of leaves
(D) None of the above

26. : In a binary search tree, the in-order traversal will yield elements in…
(A) Random order
(B) Descending order
(C) Ascending order
(D) None of the above

27. : Which of the following is NOT a property of a binary search tree?
(A) The left child is less than the parent
(B) The right child is greater than the parent
(C) All children must be leaf nodes
(D) Both A and B

28. : What is the time complexity of a level-order traversal of a binary tree?
(A) O(n)
(B) O(log n)
(C) O(n log n)
(D) O(n^2)

29. : Which of the following trees is used for efficient searching, insertion, and deletion?
(A) Binary Tree
(B) AVL Tree
(C) Red-Black Tree
(D) Both B and C

30. : What is the maximum number of edges in a binary tree with n nodes?
(A) n
(B) n-1
(C) 2n
(D) 2n-1

31. : In a trie, each node represents…
(A) A character
(B) A word
(C) A number
(D) A string

32. : Which of the following is true about B-trees?
(A) They are always binary trees
(B) They allow for efficient searching and insertion
(C) They have a variable number of children per node
(D) Both B and C

33. : What is the main purpose of a binary heap?
(A) Storing sorted data
(B) Implementing a priority queue
(C) Searching for elements
(D) None of the above

34. : Which of the following is NOT true about an AVL tree?
(A) It is a type of binary search tree
(B) It is always balanced
(C) It can have nodes with up to two children
(D) It can have varying heights

35. : What is the main disadvantage of using a binary search tree?
(A) Requires a lot of memory
(B) Can become unbalanced
(C) Limited searching capabilities
(D) Cannot handle duplicates

36. : What type of tree is used for maintaining a sorted dataset?
(A) Binary Tree
(B) Binary Search Tree
(C) AVL Tree
(D) All of the above

Data Structures MCQs

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Hash Tables

Sorting and Searching Algorithms MCQs

Miscellaneous

Non-Linear Data Structures MCQs
By: Prof. Dr. Fazal Rehman | Last updated: May 15, 2025

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