iOS Swift - Concurrency
You want to fetch user data and then fetch user posts sequentially using async/await. Which code snippet correctly does this?
You want to fetch user data and then fetch user posts sequentially using async/await. Which code snippet correctly does this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand sequential async calls
To fetch user then posts, each async call must be awaited before next.Step 2: Check each option
let user = await fetchUser() let posts = await fetchPosts(user.id) print(posts) correctly awaits both calls sequentially. let user = fetchUser() let posts = fetchPosts(user.id) print(posts) misses await. await let user = fetchUser() await let posts = fetchPosts(user.id) print(posts) uses invalid syntax. let user = await fetchUser() let posts = fetchPosts(user.id) print(posts) misses await on second call.Final Answer:
let user = await fetchUser() let posts = await fetchPosts(user.id) print(posts) -> Option CQuick Check:
await each sequentially [OK]
Quick Trick: Await each async call in order to run sequentially [OK]
Common Mistakes:
- Forgetting await on second async call
- Using invalid await let syntax
- Calling async functions without await
Master "Concurrency" in iOS Swift
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore iOS Swift Quizzes