Kotlin fundamentals

1. The following code will print "Divisible by 5" if number is equal to 25.

   if (number % 10 == 0) {
     println("Divisible by 10")
   } else if (number == 5) {
     println("Divisible by 5")
   }
   

   true

   false

2. Which of the following conditions are satisfied when x = 5?

   Choose as many answers as you see fit.

   x == 5

   x in 1..5

   x is Int

   x % 5

3. Which is not a basic concept of object-oriented programming

   Abstraction

   Readability

   Inheritance

   Polymorphism

4. Which are the four visibility modifiers in Kotlin?

   public, private, protected, abstract

   static, override, internal, external

   private, protected, public, internal

   public, protected, static, internal

5. The ___ keyword is used to call a method from the parent class.

   this

   super

   parent

   self

6. A(n) ___ defines properties or methods that a class needs to implement.

   Delegate

   Generic type

   Interface

   Subclass

7. Which of the following is best represented by a nullable type?

   The number of followers (0 or more) in a social media app.

   An optional profile picture.

   A username that must be at least one character.

   A unique ID given to every user.

8. The ___ operator allows you to call a method only if the object is non-null.

   .

   !!

   ?:

   ?.

9. Which is not true of functions in Kotlin?

   A function can be changed to another data type, and vice versa.

   A function can be returned from another function.

   A function can take another function as a parameter.

   A function has a data type, such as (Int) -> Unit.

10. A function literal is another name for a ___

    Function type

    Lambda expression

    Function reference

    Trailing lambda

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