In a circular queue implemented using an array of size 5, the front is at index 3, and the rear is at index 1. What happens after two dequeue operations?
The front moves to index 1, and the rear moves to index 4.
The front moves to index 0, and the rear remains at index 1.
The front moves to index 0, and the rear moves to index 4.
The queue becomes empty.
If a queue is implemented using a fixed-size array, what condition leads to a 'queue overflow' situation?
Trying to access an element beyond the queue's capacity.
Trying to sort the elements in the queue.
Trying to add an element to a full queue.
Trying to remove an element from an empty queue.
What is the primary disadvantage of using an array to implement a queue?
High memory usage
Complex implementation
Inefficient search operations
Fixed size limitation
When would it be more advantageous to use a linked list implementation of a queue over an array-based implementation?
When dealing with a small, fixed number of elements.
When dynamic resizing and the potential for overflow are concerns.
When the maximum number of elements in the queue is known in advance.
When memory usage needs to be tightly controlled.
What is the worst-case time complexity of searching for an element in a queue implemented using a linked list?
O(n)
O(1)
O(n log n)
O(log n)
How do you efficiently handle the situation where the array representing the queue becomes full?
Delete the oldest element.
Resize the array to accommodate more elements.
Use a linked list instead of an array.
Stop accepting new elements.
What is the purpose of the 'front' pointer in an array implementation of a queue?
It points to the next available empty location.
It tracks the total number of elements in the queue.
It points to the most recently added element.
It points to the element that has been in the queue the longest.
What is the primary characteristic that distinguishes a queue from other linear data structures?
Elements are added at one end and removed from the other.
It is a sorted data structure.
Elements are added and removed from the same end.
It allows for random access of elements.
In a queue data structure, what does the 'enqueue' operation perform?
Adds an element to the rear of the queue.
Adds an element to the front of the queue.
Removes and returns the element at the front of the queue.
Checks if the queue is empty.
Which real-world scenario best exemplifies the use of a queue data structure?
Finding the shortest route between two points
Managing a list of students sorted alphabetically
Storing a family tree with ancestors and descendants
Tracking the order of tasks assigned to a CPU