How does a circular queue determine if it is full?
Front pointer equals rear pointer
Front pointer is one position behind the rear pointer (considering wrapping)
A separate variable keeps track of the number of elements
Rear pointer reaches the end of the array
What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Lower memory usage
Dynamic resizing to prevent overflow
Faster enqueue and dequeue operations
Easier to implement
In a circular queue implemented using an array, what is the purpose of the rear pointer?
To point to the element that was most recently enqueued.
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.
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 stores the path from the source node to the current node.
It facilitates visiting all neighbors of a node before moving to the next level.
It maintains a list of visited nodes to prevent cycles.
Which of the following operations is NOT efficiently supported by a standard queue data structure?
Get the front element
Enqueue at the rear
Dequeue from the front
Search for a specific element
You need to implement a queue using two stacks. What is the time complexity of the dequeue operation in the worst-case scenario?
O(1)
O(n log n)
O(log n)
O(n)
Which data structure is commonly used to implement a priority queue where efficient insertion and removal of the highest-priority element are crucial?
Binary Heap
Hash Table
Doubly Linked List
Binary Search Tree
In a priority queue implementation using a sorted array, what is the time complexity of the dequeue operation in the worst-case scenario?
What is the time complexity of inserting an element into a binary heap-based priority queue in the worst-case scenario?
What happens when you dequeue from an empty circular queue?
The operation has no effect
The queue becomes full
The front pointer moves to the next position
An error is thrown