Swift Programming Summary & Certification Exam

Earn your official Swift & iOS Developer Specialist Certificate

Demonstrate your comprehensive command of Swift constants, optionals, structs vs classes, protocols, closures, async/await, actors, and SwiftUI.

Key Apple Engineering Skills Evaluated

Immutability with let and optional unwrapping with guard let.

Value types (struct) copy-on-write vs reference types (class).

JSON serialization using the Codable protocol.

Error propagation with throwing functions and try?.

Modern async/await concurrency and thread-safe actors.

Declarative SwiftUI view hierarchies and @State.

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+15 XP

What is the primary difference between a `struct` and a `class` in Swift?