NestJS · Junior · Question 47 of 75

Why are async methods common in Nest services?

1Async methods run on separate threads
2Nest requires every method to be async
✓Correct answer: Database and HTTP calls are asynchronous; handlers can return promises and Nest waits for them

Explanation

Controllers can return a promise or an Observable, and Nest sends the resolved value.

Further reading

NestJS: Controllers ↗

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