App Development with Swift Review UPDATED ACTUAL Exam Questions and CORRECT Answers
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Course
App Development with Swift
Institution
App Development With Swift
App Development with Swift Review
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What are the three primary goals of swift? - CORRECT ANSWER- Safe, fast, expressive
What features of swift make it a "safe language" - CORRECT ANSWER- Type safety,
type inference, error handling, optionals.
...
App Development with Swift Review
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What are the three primary goals of swift? - CORRECT ANSWER- ✔✔Safe, fast, expressive
What features of swift make it a "safe language" - CORRECT ANSWER- ✔✔Type safety,
type inference, error handling, optionals.
Which of the following is a great environment for prototyping Swift code? - CORRECT
ANSWER- ✔✔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!"
Which of the following values would be best represented with a constant?
a. Player name
b. Player level
c. Player score
d. Player location - CORRECT ANSWER- ✔✔Player name
Which of the following would be best represented with a variable?
a. name
b. birthday
c. age
d. home address - CORRECT ANSWER- ✔✔age
,Which keyword is used to declare a constant? - CORRECT ANSWER- ✔✔let
Which keyword is used to declare a variable? - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔Most values never change
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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔12
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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔36
Identify the issue with the code snippet below:
let x = 14
let y = 2.5
let result = x * y - CORRECT ANSWER- ✔✔The code with not compile. x is a Int and y is
an Double.
What is the operator called when it has an arithmetic symbol in front of the equals sign = ?
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