You want to create a typealias JSONDictionary for a dictionary with String keys and Any values. Which code correctly defines this?

hard📝 Application Q8 of 15

Swift - Data Types

You want to create a typealias JSONDictionary for a dictionary with String keys and Any values. Which code correctly defines this?

Atypealias JSONDictionary = Dictionary<String>

Btypealias JSONDictionary = [String: Any]

Ctypealias JSONDictionary = [Any: String]

Dtypealias JSONDictionary = (String, Any)

Step-by-Step Solution

Solution:

Step 1: Recall dictionary type syntax
Swift dictionaries are defined as [KeyType: ValueType].
Step 2: Match required key and value types
Keys are String, values are Any, so [String: Any] is correct.
Final Answer:
typealias JSONDictionary = [String: Any] -> Option B
Quick Check:
Dictionary alias syntax = typealias Name = [Key: Value] [OK]

Quick Trick: Use [Key: Value] syntax for dictionary typealias [OK]

Common Mistakes:

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