In the context of Breadth-First Search (BFS), how does a queue help explore a graph?
It stores the path from the source node to the current node.
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 ensures that nodes are visited in a depth-first manner.
How can you prevent a queue implemented using a linked list from encountering an overflow condition?
Use a circular linked list
Linked list implementation inherently prevents overflow
Implement a check for available memory before each enqueue operation
Use a fixed-size array instead of a linked list
Which real-world scenario is best represented using a priority queue?
Storing a history of visited web pages in a browser
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
Maintaining a list of recently used applications
What happens when you dequeue from an empty circular queue?
An error is thrown
The operation has no effect
The front pointer moves to the next position
The queue becomes full
What is the time complexity of inserting an element into a priority queue implemented using a binary heap (in the average case)?
O(1)
O(n)
O(log n)
O(n log n)
In a circular queue implemented using an array of size 5, if the front is at index 3 and the rear is at index 1, how many elements are present in the queue?
2
4
1
3
You need to implement a queue using two stacks. What is the time complexity of the dequeue operation in the worst-case scenario?
What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Easier to implement
Dynamic resizing to prevent overflow
Lower memory usage
Faster enqueue and dequeue operations
What is the time complexity of inserting an element into a binary heap-based priority queue in the worst-case scenario?
Which data structure is commonly used to implement a priority queue where efficient insertion and removal of the highest-priority element are crucial?
Hash Table
Binary Heap
Doubly Linked List
Binary Search Tree