What is the role of the 'front' pointer in a queue data structure?
It points to the element that has been in the queue the longest.
It points to the location where the next element will be added.
It keeps track of the total number of elements in the queue.
It determines if the queue is full or not.
If you were to design a system to handle customer service requests arriving through various channels, with each request needing to be addressed in the order it was received, which data structure would be most appropriate?
Binary Search Tree
Queue
Graph
Heap
Which of the following operations on a queue does NOT have a time complexity of O(1) in a standard implementation?
isEmpty
Enqueue
Searching for a specific element
Dequeue
In a queue data structure, what does the 'enqueue' operation perform?
Adds an element to the rear of the queue.
Removes and returns the element at the front of the queue.
Checks if the queue is empty.
Adds an element to the front of the queue.
Which of the following real-world scenarios can be effectively modeled using a queue?
Storing the browsing history in a web browser.
Handling customer service requests in a first-come, first-served manner.
Managing a priority-based task list.
Implementing an undo/redo functionality in a text editor.
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 the maximum number of elements in the queue is known in advance.
When memory usage needs to be tightly controlled.
When dynamic resizing and the potential for overflow are concerns.
In an array-based queue implementation, what happens when you dequeue from an empty queue?
The first element is removed.
The queue remains unchanged.
The last element is removed.
An underflow condition occurs.
Consider an array-based queue with 'front' at index 3 and 'rear' at index 7. After two dequeue operations, what will be the new value of 'front'?
5
2
1
6
What is the worst-case time complexity of searching for an element in a queue implemented using a linked list?
O(log n)
O(n log n)
O(n)
O(1)
What is the purpose of the 'front' pointer in an array implementation of a queue?
It points to the most recently added element.
It points to the next available empty location.
It tracks the total number of elements in the queue.