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
An error is thrown, preventing the operation
The queue dynamically resizes to accommodate the new element
The oldest element is overwritten to make space
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(k)
O(log k)
O(n)
O(1)
In a priority queue, elements with the same priority are dequeued in what order?
Random order
It depends on the specific priority queue implementation
Sorted order based on an additional attribute
The order they were enqueued
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 Dijkstra's algorithm, how does a priority queue help in finding the shortest path?
It stores all possible paths and their lengths
It optimizes the relaxation step by providing efficient updates
It keeps track of visited nodes to avoid cycles
It prioritizes nodes based on their distance from the source node
What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Easier to implement
Faster enqueue and dequeue operations
Dynamic resizing to prevent overflow
Lower memory usage
In the context of Breadth-First Search (BFS), how does a queue help explore a graph?
It ensures that nodes are visited in a depth-first manner.
It facilitates visiting all neighbors of a node before moving to the next level.
It maintains a list of visited nodes to prevent cycles.
It stores the path from the source node to the current node.
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
Managing a print queue where documents are printed in the order they are received
Maintaining a list of recently used applications
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 track the number of elements currently present in the queue.
To point to the element that was most recently enqueued.
Which of the following situations is MOST likely to benefit from using a priority queue?
Storing a collection of sorted integers
Managing tasks based on their urgency level
Performing a breadth-first search in a graph
Implementing a Last-In-First-Out (LIFO) data structure