What happens when you dequeue from an empty circular queue?
An error is thrown
The front pointer moves to the next position
The queue becomes full
The operation has no effect
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 mark the beginning of the queue in the circular array.
To indicate the next available position for enqueuing an element.
To point to the element that was most recently enqueued.
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
The order they were enqueued
Random order
What is the key advantage of using a linked list implementation for a queue over an array-based implementation?
Dynamic resizing to prevent overflow
Easier to implement
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?
O(log n)
O(1)
O(n)
O(n log n)
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 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?
4
2
3
1
You are designing a system where elements are added and removed from both ends. Which data structure is the most suitable?
Queue
Binary Tree
Stack
Deque
How does a circular queue determine if it is full?
A separate variable keeps track of the number of elements
Front pointer is one position behind the rear pointer (considering wrapping)
Front pointer equals rear pointer
Rear pointer reaches the end of the array
Which of the following data structures can be efficiently used to implement a priority queue?
Binary Search Tree
Hash Table
Binary Heap
Doubly Linked List