Kotlin Essentials and Its Advantages Over Java Quiz

1. Kotlin Language Origin

   Which programming language serves as the primary predecessor or inspiration for Kotlin's syntax?

   1. Java
   2. Python
   3. Ruby
   4. Swift
   5. Scala

2. Null Safety Feature

   What key feature in Kotlin helps prevent null pointer exceptions more effectively than Java?

   1. Null Safety
   2. Void Security
   3. Safe Casting
   4. Type Inference
   5. Auto Disposing

3. Default Parameters in Functions

   When defining functions in Kotlin, what feature allows you to provide default values for parameters, making method overloading for defaults less necessary compared to Java?

   1. Default Arguments
   2. Optional Types
   3. Variable Wrappers
   4. Lambda Calls
   5. Static Fields

4. Data Classes

   In Kotlin, the 'data class' keyword automatically provides functions like equals(), hashCode(), and toString(); which keyword serves a similar, but more manual, role in Java?

   1. class
   2. entity
   3. object
   4. record
   5. struct

5. Kotlin Code Conciseness

   Which advantage is commonly cited for Kotlin due to its ability to reduce boilerplate code compared to Java?

   1. Conciseness
   2. Laziness
   3. Verbosity
   4. Redundancy
   5. Obfuscation

6. Extension Functions

   What Kotlin feature allows you to add new functions to existing classes without modifying their source code?

   1. Extension Functions
   2. Helper Methods
   3. Global Imports
   4. Nested Macros
   5. Trait Injection

7. Interoperability

   Which of the following is true regarding Kotlin's ability to work in the same project as Java?

   1. Kotlin is fully interoperable with Java
   2. Kotlin cannot call Java code
   3. Kotlin projects require rewriting all Java classes
   4. Kotlin only compiles to a unique virtual machine
   5. Kotlin lacks type safety with Java objects

8. Smart Casts

   Kotlin provides a feature where type checks are followed automatically by type casts in certain cases; what is this feature called?

   1. Smart Casts
   2. Fast Casting
   3. Auto Casting
   4. Magic Casting
   5. Dynamic Types

9. Primary Constructor Usage

   Which Kotlin feature allows properties to be directly declared in the class header, unlike Java's separation of fields and constructors?

   1. Primary Constructor
   2. Header Builder
   3. Inline Interface
   4. Super Initializer
   5. Top Level Block

10. Immutability Promotion

    In Kotlin, what keyword is preferred to define immutable variables, encouraging safer code in comparison to Java’s common 'final' usage?

    1. val
    2. const
    3. let
    4. static
    5. fix