Describe a situation where you improved a process

Tell me about a time you had to make a decision with incomplete data

Design a file storage system like Dropbox

Tell me about a time you had to make a decision with incomplete data

Design a search autocomplete system

Serialize and deserialize a binary tree

Design an e-commerce checkout flow

Tell me about a time you mentored someone

Implement a trie with autocomplete

How do you approach learning a new technology?