Applied online.

Two phone screens, where you are supposed to write working code in Coderpad.io. It is a little biased towards scripting languages, as there is no autocomplete or cosmetic compiler in languages like Java, C#, or C++. You have to have working solutions and code.

Got both questions correct but was slow to get going. Recruiters responded very fast.

Create a JSON-like object for representation and implement a flatten method to return a string-to-string mapping. (Implement from scratch, test, compile, and provide working code).

Example: {x:1, y:1, z:{a:1,b:2}} flattens to {x:1, y:1, "z.a":1, "z.b": 2}

Q2. Implement a rate limiter attribute/decoration/annotation on top of an API endpoint. It caps to N requests per minute with a rolling window. (Implement from scratch, test, compile, and provide working code).