Linear Data Structures MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 20, 2024

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

 

Data Structures MCQs

Basic Concepts

  1. Introduction to Data Structures
  2. Complexity Analysis MCQs

Linear Data Structures MCQs

  1. Arrays MCQs
  2. Linked Lists MCQs
  3. Stacks MCQs
  4. Queues MCQs

Non-Linear Data Structures MCQs

  1. Trees MCQs
  2. Heaps MCQs
  3. Graphs MCQs

Hashing MCQs MCQs

  1. Hash Tables

Sorting and Searching Algorithms MCQs 

  1. Sorting Algorithms MCQs
  2. Searching Algorithms MCQs

Miscellaneous

  1. Memory Management in data structures MCQs
  2. String Manipulation Algorithms MCQs
  1. Data Structures MCQs 1
  2. Data Structures MCQs 2
  3. Data Structures MCQs 3
  4. Data Structures MCQs 4
  5. Data Structures MCQs 5
  6. Stacks Solved MCQs
  7. Queues MCQs
  8. pointer mcqs
  9. Array MCQs