You have a queue implemented using a linked list. What is the time complexity of finding the kth element from the front of the queue?
O(log k)
O(n)
O(1)
O(k)
You are designing a system where elements are added and removed from both ends. Which data structure is the most suitable?
Deque
Queue
Binary Tree
Stack
How does a circular queue determine if it is full?
A separate variable keeps track of the number of elements
Front pointer equals rear pointer
Rear pointer reaches the end of the array
Front pointer is one position behind the rear pointer (considering wrapping)
What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Faster enqueue and dequeue operations
Easier to implement
Dynamic resizing to prevent overflow
Lower memory usage
Which real-world scenario is best represented using a priority queue?
Scheduling tasks in an operating system based on their priority levels
Managing a print queue where documents are printed in the order they are received
Storing a history of visited web pages in a browser
Maintaining a list of recently used applications
When implementing a circular queue, what happens when you try to enqueue an element into a full queue?
The queue dynamically resizes to accommodate the new element
The enqueue operation is blocked until space becomes available
An error is thrown, preventing the operation
The oldest element is overwritten to make space
How does a queue ensure that elements are processed in the order they were added?
By using a Last-In, First-Out (LIFO) approach.
By using a First-In, First-Out (FIFO) approach.
By dynamically allocating memory for each element.
By using a hash function to index elements.
Which of the following operations is NOT efficiently supported by a standard queue data structure?
Enqueue at the rear
Search for a specific element
Dequeue from the front
Get the front element
Which data structure is commonly used to implement a priority queue where efficient insertion and removal of the highest-priority element are crucial?
Doubly Linked List
Binary Search Tree
Hash Table
Binary Heap
In a circular queue implemented using an array, what is the purpose of the rear pointer?
To track the number of elements currently present in the queue.
To point to the element that was most recently enqueued.
To mark the beginning of the queue in the circular array.
To indicate the next available position for enqueuing an element.