What are some common data structure interview questions?

What are some common data structure interview questions I should prepare for?

Some common questions include: 1. Explain the difference between an array and a linked list. 2. What is a hash table? 3. How do you implement a stack using queues?

Can you explain the difference between an array and a linked list?

Sure! An array is a collection of elements stored at contiguous memory locations, while a linked list consists of nodes where each node points to the next, allowing for dynamic memory allocation.

What is a hash table and how does it work?

A hash table is a data structure that maps keys to values for efficient lookup. It uses a hash function to compute an index into an array of buckets or slots, from which the desired value can be found.

What are some real-world applications of data structures?

Data structures are used in various applications like databases (B-trees), web browsers (stacks for back/forward navigation), and social networks (graphs for connections).