What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Dynamic resizing to prevent overflow
Faster enqueue and dequeue operations
Lower memory usage
Easier to implement
How does a queue ensure that elements are processed in the order they were added?
By dynamically allocating memory for each element.
By using a First-In, First-Out (FIFO) approach.
By using a hash function to index elements.
By using a Last-In, First-Out (LIFO) approach.
In the context of Breadth-First Search (BFS), how does a queue help explore a graph?
It facilitates visiting all neighbors of a node before moving to the next level.
It stores the path from the source node to the current node.
It maintains a list of visited nodes to prevent cycles.
It ensures that nodes are visited in a depth-first manner.
In a priority queue, elements with the same priority are dequeued in what order?
It depends on the specific priority queue implementation
Random order
The order they were enqueued
Sorted order based on an additional attribute
You need to implement a queue using two stacks. What is the time complexity of the dequeue operation in the worst-case scenario?
O(n log n)
O(n)
O(1)
O(log n)
Which real-world scenario is best represented using a priority queue?
Scheduling tasks in an operating system based on their priority levels
Storing a history of visited web pages in a browser
Maintaining a list of recently used applications
Managing a print queue where documents are printed in the order they are received
When implementing a circular queue, what happens when you try to enqueue an element into a full queue?
The enqueue operation is blocked until space becomes available
The oldest element is overwritten to make space
An error is thrown, preventing the operation
The queue dynamically resizes to accommodate the new element
What happens when you dequeue from an empty circular queue?
An error is thrown
The queue becomes full
The front pointer moves to the next position
The operation has no effect
In Dijkstra's algorithm, how does a priority queue help in finding the shortest path?
It prioritizes nodes based on their distance from the source node
It keeps track of visited nodes to avoid cycles
It stores all possible paths and their lengths
It optimizes the relaxation step by providing efficient updates
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(k)