You want to fetch data from multiple URLs concurrently and combine the results. Which approach using TaskGroup is best?

hard📝 Application Q8 of 15

iOS Swift - Concurrency

You want to fetch data from multiple URLs concurrently and combine the results. Which approach using TaskGroup is best?

AUse withTaskGroup to add a task for each URL fetch, then collect and combine results asynchronously

BCreate a single Task that fetches URLs one by one synchronously

CUse multiple Tasks without TaskGroup and combine results immediately

DFetch URLs sequentially inside a TaskGroup without adding tasks

Step-by-Step Solution

Solution:

Step 1: Understand concurrency for multiple fetches
Using withTaskGroup allows concurrent fetching by adding a task per URL.
Step 2: Combine results after all tasks complete
Collecting results asynchronously ensures efficient parallel fetching and combination.
Final Answer:
Use withTaskGroup to add a task for each URL fetch, then collect and combine results asynchronously -> Option A
Quick Check:
TaskGroup enables concurrent fetch and combine [OK]

Quick Trick: Add a task per URL in TaskGroup for parallel fetch [OK]

Common Mistakes:

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