Implement Currying using `bind` method

0-2 years experience

1. 1How would you use Function.prototype.bind to create a curried version of a simple add(a, b) function?
2. 2What will be the result when you call the curried add with one argument and then the second?
3. 3If you forget to return the bound function, what happens when you try to invoke the curried version?

2-5 years experience

1. 1We have a utility fetchData(url, options). Using bind, how would you expose a curried fetchDataCurried so callers can do fetchDataCurried(url)(options)?
2. 2A teammate reports that their curried function sometimes returns undefined when called with the second argument. What could be causing that bug?
3. 3Explain the trade‑offs of using bind for currying versus returning a manual closure in terms of readability and performance.

5-8 years experience

1. 1Our server‑side rendering pipeline builds a pipeline of functions curried with bind, and we see memory usage growing. What edge cases in bind‑based currying could cause leaks, and how would you mitigate them?
2. 2Design a reusable curry utility that works with any arity function and uses bind internally. How would you ensure it preserves this context and works with methods that rely on this?
3. 3If we need to send a partially applied function to a worker thread, what limitations does bind‑based currying have and how would you address them?

8+ years experience

1. 1We are migrating a legacy codebase that heavily uses manual partial application with bind to a functional library like Ramda. What architectural considerations and migration strategy would you propose to replace bind‑based currying while minimizing risk?
2. 2How would you evaluate the impact of replacing bind‑based currying on bundle size, tree‑shaking, and runtime performance across multiple teams?
3. 3In a micro‑frontend environment, different teams ship their own curry helper using bind. How would you enforce a consistent contract and avoid subtle bugs caused by differing bind semantics?