What is the primary characteristic of a linear data structure?
A) Elements are stored in a non-sequential manner
B) Each element is connected to one or two elements
C) Elements are stored in a sequential manner
D) None of the above
Answer: C) Elements are stored in a sequential manner
Which of the following is an example of a linear data structure?
A) Tree
B) Graph
C) Stack
D) None of the above
Answer: C) Stack
What is the time complexity for accessing an element in an array?
A) O(n)
B) O(log n)
C) O(1)
D) O(n^2)
Answer: C) O(1)
Which linear data structure follows the Last In First Out (LIFO) principle?
A) Queue
B) Stack
C) Array
D) Linked List
Answer: B) Stack
In a queue, elements are added at the…
A) Front
B) Middle
C) Back
D) Any position
Answer: C) Back
What type of linked list allows traversal in both directions?
A) Singly Linked List
B) Circular Linked List
C) Doubly Linked List
D) None of the above
Answer: C) Doubly Linked List
Which of the following operations has a time complexity of O(1) in a stack?
A) Pop
B) Search
C) Traverse
D) Insert
Answer: A) Pop
What is the space complexity of a linked list with n nodes?
A) O(1)
B) O(n)
C) O(n^2)
D) O(log n)
Answer: B) O(n)
Which data structure is used to implement a function call stack?
A) Queue
B) Array
C) Stack
D) Linked List
Answer: C) Stack
What is the worst-case time complexity for searching in a linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n log n)
Answer: B) O(n)
Which operation is typically NOT performed on a queue?
A) Enqueue
B) Dequeue
C) Peek
D) Push
Answer: D) Push
What is the main advantage of using a linked list over an array?
A) Faster access time
B) Dynamic size
C) Simplicity
D) Better memory locality
Answer: B) Dynamic size
Which of the following is NOT a characteristic of a circular linked list?
A) Last node points to the first node
B) Can be singly or doubly linked
C) Has a fixed size
D) Allows continuous traversal
Answer: C) Has a fixed size
What is the primary disadvantage of using an array as a data structure?
A) Fast access time
B) Fixed size
C) Random access
D) Sequential access
Answer: B) Fixed size
Which of the following is a characteristic of a stack?
A) First In First Out
B) Last In First Out
C) Allows random access
D) Can grow in size dynamically
Answer: B) Last In First Out
What is the time complexity for inserting an element at the beginning of a linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: A) O(1)
Which of the following operations has a time complexity of O(n) in a singly linked list?
A) Insertion at the head
B) Insertion at the tail
C) Deletion from the head
D) Searching for an element
Answer: D) Searching for an element
What is the space complexity of a stack with n elements?
A) O(1)
B) O(n)
C) O(n^2)
D) O(log n)
Answer: B) O(n)
Which of the following data structures allows for insertion and deletion from both ends?
A) Stack
B) Queue
C) Deque
D) Array
Answer: C) Deque
What is the average time complexity for searching in a stack?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: B) O(n)
What type of data structure is used for implementing a breadth-first search?
A) Stack
B) Queue
C) Array
D) Linked List
Answer: B) Queue
In a priority queue, elements are dequeued based on their…
A) Insertion order
B) Value
C) Size
D) Position
Answer: B) Value
Which of the following best describes a doubly linked list?
A) Nodes can be traversed in one direction only
B) Nodes contain a pointer to both the next and previous nodes
C) It has a fixed number of nodes
D) None of the above
Answer: B) Nodes contain a pointer to both the next and previous nodes
What is the main disadvantage of a stack?
A) Limited size
B) Random access
C) LIFO order
D) Complexity
Answer: A) Limited size
Which of the following operations in a queue has a time complexity of O(1)?
A) Enqueue
B) Dequeue
C) Both A and B
D) None of the above
Answer: C) Both A and B
What is the time complexity for traversing a linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: B) O(n)
In which data structure can you insert and delete elements at both ends?
A) Stack
B) Queue
C) Circular Linked List
D) Deque
Answer: D) Deque
What is the primary purpose of a stack?
A) To store data in a sorted manner
B) To manage function calls
C) To allow random access to elements
D) To manage tasks in a specific order
Answer: B) To manage function calls
What is the time complexity for deleting the last element in a singly linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: B) O(n)
Which of the following is NOT a type of linear data structure?
A) Array
B) Linked List
C) Graph
D) Stack
Answer: C) Graph
What is the main characteristic of a queue?
A) Elements are processed in a random order
B) It follows the LIFO principle
C) It follows the FIFO principle
D) It allows duplicate elements
Answer: C) It follows the FIFO principle
What is the maximum number of elements in a stack of size n?
A) n
B) n+1
C) 2n
D) Unlimited
Answer: A) n
Which data structure is more memory efficient for large datasets?
A) Array
B) Linked List
C) Stack
D) Queue
Answer: B) Linked List
What is the time complexity for accessing an element in a linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: B) O(n)
What is a key advantage of a circular linked list?
A) Simplicity
B) Efficient memory usage
C) Continuous traversal without NULL checks
D) None of the above
Answer: C) Continuous traversal without NULL checks
What is the time complexity of removing an element from the front of a queue?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: A) O(1)
Which of the following describes a stack’s behavior?
A) First In First Out
B) Last In First Out
C) Both A and B
D) None of the above
Answer: B) Last In First Out
What is the space complexity of an array of size n?
A) O(1)
B) O(n)
C) O(n^2)
D) O(log n)
Answer: B) O(n)
What is the primary operation of a stack?
A) Enqueue
B) Dequeue
C) Push and Pop
D) Insert and Delete
Answer: C) Push and Pop
What is the time complexity of inserting an element at the end of a doubly linked list?
A) O(1)
B) O(n)
C) O(log n)
D) O(n^2)
Answer: A) O(1)
Which of the following is a disadvantage of using arrays?
A) Dynamic sizing
B) Faster access time
C) Wasted memory due to fixed size
D) Easy to implement
Answer: C) Wasted memory due to fixed size
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