Which of the following data structures can be efficiently used to implement a priority queue?
Binary Heap
Binary Search Tree
Hash Table
Doubly Linked List
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(n)
O(k)
O(log k)
O(1)
Which data structure is commonly used to implement a priority queue where efficient insertion and removal of the highest-priority element are crucial?
When implementing a circular queue, what happens when you try to enqueue an element into a full queue?
The oldest element is overwritten to make space
The enqueue operation is blocked until space becomes available
An error is thrown, preventing the operation
The queue dynamically resizes to accommodate the new element
In a circular queue implemented using an array, what is the purpose of the rear pointer?
To mark the beginning of the queue in the circular array.
To indicate the next available position for enqueuing an element.
To point to the element that was most recently enqueued.
To track the number of elements currently present in the queue.
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 hash function to index elements.
By dynamically allocating memory for each element.
By using a First-In, First-Out (FIFO) approach.
In a priority queue, elements with the same priority are dequeued in what order?
Random order
The order they were enqueued
It depends on the specific priority queue implementation
Sorted order based on an additional attribute
What is the time complexity of inserting an element into a binary heap-based priority queue in the worst-case scenario?
O(n log n)
O(log n)
In Dijkstra's algorithm, how does a priority queue help in finding the shortest path?
It keeps track of visited nodes to avoid cycles
It prioritizes nodes based on their distance from the source node
It stores all possible paths and their lengths
It optimizes the relaxation step by providing efficient updates
In a scenario simulating a print queue, where print jobs with higher priority should be executed first, which queue implementation is most suitable?
Circular queue
Deque (Double-ended queue)
Simple queue
Priority queue