18 Questions
What purpose do type aliases serve in Scala?
Improve code readability
In Scala, what is the recommended approach for using if statements as per the text?
Only inside a function
How can exceptions and print statements be used in functional programming in Scala?
Wrap side effects outside the functional programming core
Which of the following is NOT part of the functional programming core in Scala?
For loops
What is the purpose of companions objects in Scala?
Provide a mechanism to associate methods with a class without using inheritance
Which of the following best describes the apply method in Scala?
A special method that is called when an object is called like a function
What is the purpose of the apply method in Scala?
To create a new object of a class
What type of equality checks do case classes in Scala automatically provide?
Value-based equality checks
What is one of the functional programming principles provided by case classes in Scala?
Immutability
What method in Scala is used to directly call a function defined using the 'def' keyword?
No method is used
What is a major difference between a class and a case class in Scala?
Case classes automatically provide immutability
Which of the following is a common Scala term for a companion object of a class?
Singleton
What happens when you call a class or object with function-like syntax in Scala?
It invokes the apply method implicitly.
Which of the following can have an apply method in Scala?
Classes, objects, and traits.
What is the primary purpose of a companion object in Scala?
To hold utility functions related to a class.
How do constructors in Scala differ from those in object-oriented programming languages?
They can return values.
What is the purpose of the createInstance function in the provided code?
To create an instance of MyClass with a sequential integer.
What does the val seqInt: Int declaration in the MyClass constructor do?
It creates an immutable integer field for the MyClass instances.
Learn about the apply method in Scala classes or objects and how it is invoked implicitly when using function-like syntax. Explore how traits can have apply methods and how to handle sequential IDs in Scala code by wrapping it around core functional programming concepts.
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