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Linked Lists

⛪ Computer Science and Engineering > Data Structure

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Q 1: Which of the following is true about a doubly linked list?

A It can only be traversed in one direction.
B It cannot be circular.
C It has better cache locality than a singly linked list.
D It can be traversed in both directions.

Q 2: What is a linked list?

A A collection of items that are sorted based on a specific criterion.
B A collection of items that are stored in contiguous memory locations.
C A collection of items that are connected by links or pointers.
D A collection of items that are stored in a random order.

Q 3: Which of the following is NOT a type of linked list?

A Singly linked list
B Doubly linked list
C Circular linked list
D Quad linked list

Q 4: What is the time complexity of inserting an element at the end of a singly linked list?

A O(1)
B O(n)
C O(log n)
D O(n log n)

Q 5: Which of the following operations can be performed efficiently on a linked list?

A Inserting an element in the middle of the list.
B Sorting the elements in the list.
C Accessing an element at a random index.
D Removing the first element in the list.

Q 6: In a doubly linked list, each node has how many pointers?

A None
B One
C Two
D Three

Q 7: Which of the following is an advantage of using a linked list over an array?

A Linked lists have a fixed size.
B Linked lists allow for efficient random access.
C Linked lists can be easily resized.
D Linked lists have better cache locality.

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

A O(1)
B O(n)
C O(log n)
D O(n log n)

Q 9: Which of the following operations can be performed efficiently on a circular linked list?

A Inserting an element at the beginning of the list.
B Removing the last element in the list.
C Accessing an element at a random index.
D Sorting the elements in the list.

Q 10: What is the time complexity of inserting an element at the beginning of a doubly linked list?

A O(1)
B O(n)
C O(log n)
D O(n log n)

Q 11: Which of the following is a disadvantage of using a linked list over an array?

A Linked lists require more memory than arrays.
B Linked lists do not allow for efficient random access.
C Linked lists cannot be easily resized.
D Linked lists have poor cache locality.

Q 12: What is the time complexity of deleting an element from a singly linked list?

A O(1)
B O(n)
C O(log n)
D O(n log n)

Q 13: Which of the following is NOT a common application of linked lists?

A Implementing a queue or stack
B Implementing a graph
C Implementing a hash table
D Implementing a string

Q 14: Which of the following is the correct way to traverse a linked list?

A Using a for loop
B Using a while loop
C Using recursion
D Using a do-while loop

Q 15: What is the purpose of a sentinel node in a linked list?

A To mark the end of the list
B To indicate the beginning of the list
C To store metadata about the list
D To help with memory management

Q 16: Which of the following is an example of a circular linked list?

A A list where each node has only one pointer to the next node
B A list where each node has two pointers, one to the next node and one to the previous node
C A list where the last node points to the first node
D A list where the first node points to the last node

Q 17: Which of the following is a disadvantage of using a singly linked list over a doubly linked list?

A Singly linked lists have poor cache locality.
B Singly linked lists require more memory than doubly linked lists.
C Singly linked lists cannot be circular.
D Singly linked lists do not allow for efficient traversal in both directions.

Q 18: What is the time complexity of inserting an element at a specific index in a singly linked list?

A O(1)
B O(n)
C O(log n)
D O(n log n)

Q 19: Which of the following is a valid way to implement a stack using a linked list?

A Add elements to the front of the list and remove elements from the back of the list.
B Add elements to the back of the list and remove elements from the front of the list.
C Add elements to the front of the list and remove elements from the front of the list.
D Add elements to the back of the list and remove elements from the back of the list.

Q 20: What is the time complexity of reversing a linked list?

A O(1)
B O(n)
C O(log n)
D O(n log n)