1. Implement a queue using an array.
2. Implement a queue using a linked list.
3. Write a program to enqueue an element in a queue.
4. Write a program to dequeue an element from a queue.
5. Write a function to check if a queue is empty.
6. Write a function to check if a queue is full.
7. Implement a circular queue using an array.
8. Write a program to reverse a queue.
9. Write a program to find the front element of a queue.
10. Write a program to get the size of a queue.
11. Implement a queue using two stacks.
12. Write a function to display the elements of a queue.
13. Write a program to delete all elements from a queue.
14. Write a program to merge two queues.
15. Write a program to copy one queue to another.
16. Write a program to implement a priority queue.
17. Write a function to get the maximum element in a queue.
18. Write a function to get the minimum element in a queue.
19. Write a program to sort a queue using another queue.
20. Write a program to interleave two queues.
21. Write a function to rotate a queue by k positions.
22. Write a program to check if a queue is a palindrome.
23. Implement a queue with a fixed-size array.
24. Write a function to find the middle element of a queue.
25. Write a program to implement a deque (double-ended queue).
26. Write a program to implement a queue using recursion.
27. Write a program to print the first non-repeating character in a stream using a queue.
28. Write a function to get the last element of a queue.
29. Write a program to find the second largest element in a queue.
30. Write a program to reverse the first k elements of a queue.
31. Write a program to implement a queue of integers.
32. Write a program to implement a queue of strings.
33. Write a program to check if two queues are equal.
34. Write a program to generate binary numbers from 1 to n using a queue.
35. Write a program to generate the first n Fibonacci numbers using a queue.
36. Write a program to implement a queue with dynamic memory allocation.
37. Write a program to print the elements of a queue in reverse order using recursion.
38. Write a program to find the frequency of elements in a queue.
39. Write a program to rotate a queue in both directions.
40. Write a program to implement a queue with a priority level for each element.