App Development with Swift Review Exam Questions and Answers 100% Solved

©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

App Development with Swift Review

Exam Questions and Answers 100%

Solved


What are the three primary goals of swift? - ✔✔Safe, fast, expressive

What features of swift make it a "safe language" - ✔✔Type safety, type

inference, error handling, optionals.

Which of the following is a great environment for prototyping Swift code? -

✔✔Playgrounds (not xcode, safari, or terminal)

What will the following code print to the console?

let helloWorld = "Hello, world!"

let helloPlayground = "Hello, playground!"

let goodbyePlayground= "Goodbye, playground!"



print("Testing, Testing, 1-2-3") - ✔✔"Testing, Testing, 1-2-3"

Which of the following values would be best represented with a constant?

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

a. Player name

b. Player level

c. Player score

d. Player location - ✔✔Player name

Which of the following would be best represented with a variable?

a. name

b. birthday

c. age

d. home address - ✔✔age

Which keyword is used to declare a constant? - ✔✔let

Which keyword is used to declare a variable? - ✔✔var

Which of the following is NOT a reason for declaring most values as

constants?

a. It is a best practice

b. The complier can make special optimizations for immutable values.

c. It is safer; developers can rely on a consistent value

d. Most values never change - ✔✔Most values never change

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

Using type inference, which of the following variables would be assigned in

a double type?

A. var state = "Rhode Island"

B. let country = "Belgium"

C. let population = 142000

D. let speedLimit = 75.0 - ✔✔let speedLimit = 75.0

Will the following code snippet compile? Why?

let number: Double = 3



a. Yes, because the compiler will assign the value 3.0 to number

b. Yes, because 3 is a double

c. No, because 3 is not a double - ✔✔Yes, because the compiler will assign

the value 3.0 to number

What is the value of myNumber at the end of the following code?

let x = 2

let y = 4

let z = 6



let myNumber = x + y + z - ✔✔12

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

What is the value of myNumber at the end of the following code?

let x = 2

let y = 4

let z = 6



let myNumber = x + y * z - ✔✔26

What is the value of myNumber at the end of the following code?

let x = 2

let y = 4

let z = 6

let myNumber = x * y - z - ✔✔2

What is the value of myNumber at the end of the following code?

let x = 2

let y = 4

let z = 6



let myNumber = (x + y) * z - ✔✔36

Identify the issue with the code snippet below:

let x = 14