In what scenario would using a deque NOT provide a significant performance advantage over a regular queue?
When implementing a job scheduling queue with different priority levels
When implementing a Least Recently Used (LRU) cache with a fixed size
When processing a stream of data in a First-In, First-Out (FIFO) manner
When elements need to be added and removed from both ends frequently
Consider two queues: Q1 implemented using a singly linked list and Q2 implemented using a circular array. Both queues currently hold n elements. What is the difference in time complexity for dequeuing all elements from Q1 and Q2?
Both have the same time complexity, O(n)
Q1 has O(n) complexity, Q2 has O(1) complexity
Q1 has O(n) complexity, Q2 has O(n^2) complexity
Q1 has O(n^2) complexity, Q2 has O(n) complexity
In a circular queue implemented using an array of size N, what is the most efficient way to check if the queue is full?
(rear + 1) % N == front
rear == N - 1
front == rear
front == 0
Which of the following algorithms does NOT inherently rely on a queue data structure?
Dijkstra's shortest path algorithm
Depth-first search
Level order traversal of a binary tree
Breadth-first search
Which queue implementation is generally preferred when you need to prioritize elements based on certain criteria, leading to elements being dequeued out of their standard FIFO order?
None of the above
Circular queue
Array-based queue
Linked list-based queue
What is a significant disadvantage of implementing a queue using a single linked list compared to a doubly linked list?
More complex implementation logic
Increased memory usage due to the extra 'next' pointer
Slower enqueue operations as the tail needs to be traversed
Inability to perform efficient dequeue operations
In the context of operating systems, which of the following is a common use case for a queue?
Storing frequently accessed data for faster retrieval
Scheduling processes for execution by the CPU
Managing the order of function calls in a program
Maintaining the order of packets in a network router
What type of memory allocation does a linked list-based queue primarily rely on?
Heap allocation
Stack allocation
Direct memory access
Static memory allocation
In a circular queue implemented using an array of size N, how many elements can the queue hold at any given time?
N + 1
N - 1
It depends on the data type of the elements
N
Consider a circular queue implemented using an array. If the front is at index 5 and the rear is at index 2 (with a valid queue configuration), what is the current size of the queue (assuming the array has a capacity greater than the queue size)?
3
4
Cannot be determined with the given information
7