[Solved] What will this Swift code print if the server returns JSON da... let task = URLSession.shared.dataTask(with: url) { data, _, error in if let data = data { print(String(data: data, encoding: .utf8) ?? | iOS Swift

iOS Swift - Networking

What will this Swift code print if the server returns JSON data successfully?

let url = URL(string: "https://api.example.com/data")!
let task = URLSession.shared.dataTask(with: url) { data, _, error in
  if let data = data {
    print(String(data: data, encoding: .utf8) ?? "No data")
  } else {
    print("Error")
  }
}
task.resume()

AThe JSON data as a string

BError

Cnil

DNothing prints

Step-by-Step Solution

Solution:

Step 1: Analyze the dataTask completion handler
If data is received, it converts data to a UTF-8 string and prints it.
Step 2: Understand the output when server returns JSON
The JSON data bytes convert to a readable string and print to console.
Final Answer:
The JSON data as a string -> Option A
Quick Check:
Data received = print JSON string [OK]

Quick Trick: If data exists, it prints as string [OK]

Common Mistakes:

Assuming print("Error") always runs
Expecting nil instead of string output
Thinking nothing prints without resume()

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What will this Swift code print if the server returns JSON data successfully?

Step 1: Analyze the dataTask completion handler

Step 2: Understand the output when server returns JSON

Final Answer:

Quick Check:

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