In the context of Breadth-First Search (BFS), how does a queue help explore a graph?
It maintains a list of visited nodes to prevent cycles.
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 ensures that nodes are visited in a depth-first manner.
Which of the following situations is MOST likely to benefit from using a priority queue?
Performing a breadth-first search in a graph
Storing a collection of sorted integers
Managing tasks based on their urgency level
Implementing a Last-In-First-Out (LIFO) data structure
Which real-world scenario is best represented using a priority queue?
Maintaining a list of recently used applications
Managing a print queue where documents are printed in the order they are received
Scheduling tasks in an operating system based on their priority levels
Storing a history of visited web pages in a browser
How can you prevent a queue implemented using a linked list from encountering an overflow condition?
Implement a check for available memory before each enqueue operation
Use a circular linked list
Linked list implementation inherently prevents overflow
Use a fixed-size array instead of a linked list
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 stores all possible paths and their lengths
It keeps track of visited nodes to avoid cycles
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(n)
O(k)
O(1)
O(log k)
Which of the following data structures can be efficiently used to implement a priority queue?
Doubly Linked List
Binary Heap
Binary Search Tree
Hash Table
Which of the following operations is NOT efficiently supported by a standard queue data structure?
Enqueue at the rear
Get the front element
Search for a specific element
Dequeue from the front
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(log n)
In a priority queue, elements with the same priority are dequeued in what order?
It depends on the specific priority queue implementation
Sorted order based on an additional attribute
Random order
The order they were enqueued