Async Patterns interview questions

1. A.a standard way to cancel async operations like fetch or timers via a shared signal
2. B.running independent async tasks concurrently and awaiting all of their results
3. C.deeply nested callbacks that hurt readability, mitigated by promises and async/await
4. D.a rejected promise with no catch handler, which can terminate the process

Answer + AI explanation with Pro

1. A.Callback hell
2. B.util.promisify
3. C.AbortController
4. D.Graceful shutdown

Answer + AI explanation with Pro

1. A.Callback hell — running independent async tasks concurrently and awaiting all of their results
2. B.Callback hell — a standard way to cancel async operations like fetch or timers via a shared signal
3. C.Callback hell — deeply nested callbacks that hurt readability, mitigated by promises and async/await
4. D.Callback hell — wraps a Node callback-style function so it returns a promise

Answer + AI explanation with Pro

1. A.running independent async tasks concurrently and awaiting all of their results
2. B.wraps a Node callback-style function so it returns a promise
3. C.deeply nested callbacks that hurt readability, mitigated by promises and async/await
4. D.a rejected promise with no catch handler, which can terminate the process

Answer + AI explanation with Pro

1. A.Graceful shutdown
2. B.Unhandled rejection
3. C.util.promisify
4. D.Parallel with Promise.all

Answer + AI explanation with Pro

1. A.util.promisify — deeply nested callbacks that hurt readability, mitigated by promises and async/await
2. B.util.promisify — a rejected promise with no catch handler, which can terminate the process
3. C.util.promisify — a standard way to cancel async operations like fetch or timers via a shared signal
4. D.util.promisify — wraps a Node callback-style function so it returns a promise

Answer + AI explanation with Pro

1. A.wraps a Node callback-style function so it returns a promise
2. B.running independent async tasks concurrently and awaiting all of their results
3. C.deeply nested callbacks that hurt readability, mitigated by promises and async/await
4. D.a rejected promise with no catch handler, which can terminate the process

Answer + AI explanation with Pro

1. A.AbortController
2. B.util.promisify
3. C.Unhandled rejection
4. D.Parallel with Promise.all

Answer + AI explanation with Pro

1. A.Unhandled rejection — closing servers and connections on SIGTERM before the process exits
2. B.Unhandled rejection — running independent async tasks concurrently and awaiting all of their results
3. C.Unhandled rejection — a rejected promise with no catch handler, which can terminate the process
4. D.Unhandled rejection — a standard way to cancel async operations like fetch or timers via a shared signal

Answer + AI explanation with Pro

1. A.closing servers and connections on SIGTERM before the process exits
2. B.deeply nested callbacks that hurt readability, mitigated by promises and async/await
3. C.running independent async tasks concurrently and awaiting all of their results
4. D.wraps a Node callback-style function so it returns a promise

Answer + AI explanation with Pro

1. A.Graceful shutdown
2. B.Parallel with Promise.all
3. C.AbortController
4. D.Unhandled rejection

Answer + AI explanation with Pro

1. A.Parallel with Promise.all — deeply nested callbacks that hurt readability, mitigated by promises and async/await
2. B.Parallel with Promise.all — wraps a Node callback-style function so it returns a promise
3. C.Parallel with Promise.all — a rejected promise with no catch handler, which can terminate the process
4. D.Parallel with Promise.all — running independent async tasks concurrently and awaiting all of their results

Answer + AI explanation with Pro

1. A.deeply nested callbacks that hurt readability, mitigated by promises and async/await
2. B.closing servers and connections on SIGTERM before the process exits
3. C.running independent async tasks concurrently and awaiting all of their results
4. D.a rejected promise with no catch handler, which can terminate the process

Answer + AI explanation with Pro

1. A.Graceful shutdown
2. B.Unhandled rejection
3. C.util.promisify
4. D.Parallel with Promise.all

Answer + AI explanation with Pro

1. A.Graceful shutdown — a standard way to cancel async operations like fetch or timers via a shared signal
2. B.Graceful shutdown — wraps a Node callback-style function so it returns a promise
3. C.Graceful shutdown — closing servers and connections on SIGTERM before the process exits
4. D.Graceful shutdown — running independent async tasks concurrently and awaiting all of their results

Answer + AI explanation with Pro

1. A.wraps a Node callback-style function so it returns a promise
2. B.closing servers and connections on SIGTERM before the process exits
3. C.deeply nested callbacks that hurt readability, mitigated by promises and async/await
4. D.a standard way to cancel async operations like fetch or timers via a shared signal

Answer + AI explanation with Pro

1. A.AbortController
2. B.Unhandled rejection
3. C.Parallel with Promise.all
4. D.util.promisify

Answer + AI explanation with Pro

1. A.AbortController — running independent async tasks concurrently and awaiting all of their results
2. B.AbortController — a standard way to cancel async operations like fetch or timers via a shared signal
3. C.AbortController — closing servers and connections on SIGTERM before the process exits
4. D.AbortController — wraps a Node callback-style function so it returns a promise

Answer + AI explanation with Pro