java data structure interview questions

Here are some common data structure interview questions in Java:

1. What is the difference between an array and a linked list?
2. How does a hash table work?
3. How does a binary search tree work?
4. What is the difference between a stack and a queue?
5. How does a heap work?
6. What is the time complexity of inserting an element into a linked list, array, and hash table?
7. What is the time complexity of searching for an element in a linked list, array, and hash table?
8. What is the time complexity of deleting an element from a linked list, array, and hash table?
9. How do you implement a stack using a linked list or an array?
10. How do you implement a queue using a linked list or an array?

These questions can test your understanding of different data structures and their performance characteristics, as well as your ability to implement basic data structures using arrays and linked lists.