[Solved] Given this Swift code snippet, what will be printed if the server returns a JSON with a "message" key? let data = ...... [String: Any], let message = json["message"] as? | iOS Swift

iOS Swift - Networking

Given this Swift code snippet, what will be printed if the server returns a JSON with a "message" key? let data = ... // JSON data from server if let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any], let message = json["message"] as? String { print(message) } else { print("No message") }

AThe value of the "message" key from the JSON

BNo message

CAn error message about JSON parsing

DNothing will print

Step-by-Step Solution

Solution:

Step 1: Analyze JSON parsing logic
The code tries to parse JSON and extract the "message" string key.
Step 2: Determine output if "message" key exists
If the key exists, it prints its value; otherwise, it prints "No message".
Final Answer:
The value of the "message" key from the JSON -> Option A
Quick Check:
JSON "message" key exists = print value [OK]

Quick Trick: If JSON key exists, print its value; else print fallback [OK]

Common Mistakes:

Confusing optional binding with forced unwrapping
Expecting error print without catch block
Assuming no output if key missing

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More iOS Swift Quizzes

[String: Any], let message = json["message"] as?

Step 1: Analyze JSON parsing logic

Step 2: Determine output if "message" key exists

Final Answer:

Quick Check:

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