What happens when you dequeue from an empty circular queue?
The front pointer moves to the next position
An error is thrown
The queue becomes full
The operation has no effect
In a scenario simulating a print queue, where print jobs with higher priority should be executed first, which queue implementation is most suitable?
Simple queue
Priority queue
Deque (Double-ended queue)
Circular queue
Which of the following situations is MOST likely to benefit from using a priority queue?
Implementing a Last-In-First-Out (LIFO) data structure
Performing a breadth-first search in a graph
Storing a collection of sorted integers
Managing tasks based on their urgency level
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 ensures that nodes are visited in a depth-first manner.
It maintains a list of visited nodes to prevent cycles.
It stores the path from the source node to the current node.
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(n)
O(log k)
O(1)
When implementing a circular queue, what happens when you try to enqueue an element into a full queue?
The queue dynamically resizes to accommodate the new element
The enqueue operation is blocked until space becomes available
An error is thrown, preventing the operation
The oldest element is overwritten to make space
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
What is the time complexity of inserting an element into a binary heap-based priority queue in the worst-case scenario?
O(log n)
O(n log n)
In a circular queue implemented using an array, what is the purpose of the rear pointer?
To track the number of elements currently present in the queue.
To indicate the next available position for enqueuing an element.
To mark the beginning of the queue in the circular array.
To point to the element that was most recently enqueued.
Which of the following operations is NOT efficiently supported by a standard queue data structure?
Search for a specific element
Get the front element
Dequeue from the front
Enqueue at the rear