What are the differences between data structures?

What are the main differences between arrays and linked lists?

Arrays are fixed-size and allow random access, while linked lists are dynamic and allow efficient insertions/deletions.

Can you explain the advantages of using a hash table?

Hash tables provide average-case constant time complexity for lookups, making them very efficient for search operations.

What about trees? How do they differ from other structures?

Trees are hierarchical structures that allow for efficient searching, insertion, and deletion, especially in sorted data.

When should I use a stack instead of a queue?

Use a stack for LIFO (Last In, First Out) operations, like undo features, and a queue for FIFO (First In, First Out) tasks, like scheduling.