[Solved] What is wrong with this error handling code snippet? URLSession.shared.dataTask(with:... What is wrong with this error handling code snippet? | iOS Swift

iOS Swift - Networking

What is wrong with this error handling code snippet?

URLSession.shared.dataTask(with: url) { data, response, error in
  guard let error = error else {
    print("Error: \(error.localizedDescription)")
    return
  }
  print("Success")
}.resume()

Aerror is not optional and cannot be unwrapped

BThe guard statement logic is reversed; it should check error == nil

Cresume() is missing to start the task

Dprint statements are swapped but code runs fine

Step-by-Step Solution

Solution:

Step 1: Analyze guard statement logic
guard let error = error unwraps error if it exists, but the code treats it as an error case incorrectly.
Step 2: Correct logic for error handling
It should check if error == nil to proceed, else handle error.
Final Answer:
The guard statement logic is reversed; it should check error == nil -> Option B
Quick Check:
Guard logic must correctly check error presence [OK]

Quick Trick: Guard should check error == nil to continue success path [OK]

Common Mistakes:

Reversing guard condition logic
Assuming error is non-optional
Forgetting resume() disables task

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What is wrong with this error handling code snippet?

Step 1: Analyze guard statement logic

Step 2: Correct logic for error handling

Final Answer:

Quick Check:

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