13 questions for “Promises & async/await”

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Information Technology

13 questions in 2 technologies

#	Question	Technology	Topic	Level
1	How does async/await relate to Promises under the hood, and what does 'await' actually do to program execution? Node.js › Async Patterns	Node.js	Async Patterns	Intermediate
2	How do you catch errors from a Promise chain versus async/await? JavaScript › Error Handling	JavaScript	Error Handling	Intermediate
3	How does async/await map onto the microtask queue under the hood? JavaScript › Event Loop & Concurrency	JavaScript	Event Loop & Concurrency	Advanced
4	How were generators historically used to write asynchronous code before async/await existed? JavaScript › Iterators & Generators	JavaScript	Iterators & Generators	Advanced
5	How do you loop over an async iterable? JavaScript › Async Iterators & Streams	JavaScript	Async Iterators & Streams	Beginner
6	What is the difference between the microtask queue and the macrotask (task) queue? JavaScript › Event Loop & Concurrency	JavaScript	Event Loop & Concurrency	Intermediate
7	Why might Promise.all() be the wrong tool when consuming many async iterators? JavaScript › Async Iterators & Streams	JavaScript	Async Iterators & Streams	Advanced
8	How do you write an effective test for asynchronous code? JavaScript › Debugging, Testing & Tooling	JavaScript	Debugging, Testing & Tooling	Advanced
9	How do global error handlers like window.onerror and unhandledrejection work? JavaScript › Error Handling	JavaScript	Error Handling	Advanced
10	How do you implement a retry-with-backoff pattern around a function that might throw? JavaScript › Error Handling	JavaScript	Error Handling	Advanced

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