What is traversal in the context of data structures?
a) Adding an element to the data structure
b) Removing an element from the data structure
c) Accessing and processing each element of the data structure
d) Sorting the elements of the data structure
Answer: c) Accessing and processing each element of the data structure
Which traversal technique visits the left subtree, then the root, and finally the right subtree in a binary tree?
a) Preorder traversal
b) Inorder traversal
c) Postorder traversal
d) Level order traversal
Answer: b) Inorder traversal
Which traversal method is used in depth-first search (DFS) of a graph?
a) Inorder traversal
b) Preorder traversal
c) Postorder traversal
d) Any of the above
Answer: d) Any of the above
In a linked list, which operation requires traversal to reach the desired position?
a) Insertion at the head
b) Deletion at the head
c) Insertion at the tail
d) All of the above
Answer: c) Insertion at the tail
What is the time complexity of traversing an array of size n?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: c) O(n)
Insertion Operations
What is the time complexity of inserting an element at the beginning of a singly linked list?
a) O(1)
b) O(n)
c) O(log n)
d) O(n^2)
Answer: a) O(1)
In an array, what is the time complexity of inserting an element at the end?
a) O(1)
b) O(n)
c) O(log n)
d) O(n^2)
Answer: a) O(1)
What is the time complexity of inserting an element at a specific position in an array of size n?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: c) O(n)
In a binary search tree (BST), what is the average time complexity of inserting an element?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: b) O(log n)
In a heap, what is the time complexity of inserting an element?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: b) O(log n)
Deletion Operations
What is the time complexity of deleting the first element of a singly linked list?
a) O(1)
b) O(n)
c) O(log n)
d) O(n^2)
Answer: a) O(1)
In an array, what is the time complexity of deleting an element from a specific position?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: c) O(n)
What is the time complexity of deleting an element from the end of an array of size n?
a) O(1)
b) O(n)
c) O(log n)
d) O(n^2)
Answer: a) O(1)
In a binary search tree (BST), what is the average time complexity of deleting an element?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: b) O(log n)
What is the time complexity of deleting the root element in a max heap?
a) O(1)
b) O(log n)
c) O(n)
d) O(n^2)
Answer: b) O(log n)
Combined Operations
Which data structure allows insertion, deletion, and traversal in O(1) time complexity?
a) Array
b) Singly linked list
c) Doubly linked list
d) None of the above
Answer: d) None of the above
Which of the following data structures supports O(1) time complexity for both insertion and deletion at the beginning?
a) Array
b) Stack
c) Queue
d) Singly linked list
Answer: d) Singly linked list
Which traversal method is typically used to display elements of a binary search tree in ascending order?
a) Preorder
b) Inorder
c) Postorder
d) Level order
Answer: b) Inorder
In which data structure does insertion and deletion take O(1) time but traversal takes O(n) time?
a) Stack
b) Queue
c) Linked list
d) Binary search tree
Answer: c) Linked list
What is the time complexity of inserting an element in the middle of a linked list?
a) O(1)
b) O(n)
c) O(log n)
d) O(n log n)
Answer: b) O(n)
Basic Concepts
Non-Linear Data Structures MCQs
Sorting and Searching Algorithms MCQs
- Data Structures MCQs 1
- Data Structures MCQs 2
- Data Structures MCQs 3
- Data Structures MCQs 4
- Data Structures MCQs 5
- Stacks Solved MCQs
- Queues MCQs
- pointer mcqs
- Array MCQs