📥 Queue – Data Structure Topics for Interviews

This section explores queue-based data structures including simple queues, circular queues, double-ended queues (deque), and priority queues. Learn about operations like enqueue, dequeue, peek, and their time complexities with step-by-step code breakdowns and real interview Q&A.

• • 1. What is a queue in data structures and how does it work
  • 2. What are the key properties of a queue
  • 3. What is the difference between a queue and a stack
  • 4. What are the types of queues in data structures
  • 5. What is a circular queue and why is it used
  • 6. How do you implement a queue using arrays
  • 7. How do you implement a queue using linked lists
  • 8. What is the time complexity of enqueue and dequeue operations
  • 9. What are the applications of queues in real-world programming
  • 10. What is a priority queue and how does it differ from a normal queue
  • 11. What is the difference between a deque and a queue
  • 12. How do you implement a priority queue using a heap
  • 13. What are the use cases of priority queues in computer science
  • 14. How does a double-ended queue (deque) work