Scala perguntas e respostas de entrevista
Pergunta 21. Explain the 'zip' method in Scala collections.
The 'zip' method in Scala collections combines two collections element-wise, creating a new collection of pairs. If the original collections have different lengths, the resulting collection will have the length of the shorter one.
Pergunta 22. What is the purpose of the 'implicit parameter' in Scala?
An implicit parameter is a parameter marked with the 'implicit' keyword. It allows the compiler to automatically provide a value for the parameter if there is an implicit value of the corresponding type in scope.
Pergunta 23. What is Scala and why is it used?
Scala is a programming language that combines object-oriented and functional programming. It is used for building scalable and concise applications on the Java Virtual Machine (JVM).
Pergunta 24. Explain the difference between val and var in Scala.
val is a keyword used for defining immutable variables, while var is used for defining mutable variables.
Pergunta 25. What is the significance of 'Option' in Scala?
'Option' is used to represent optional values. It can either be 'Some(value)' if a value is present or 'None' if the value is absent.
Mais uteis segundo os usuarios:
- What is a higher-order function?
- Explain the 'yield' keyword in Scala.
- Explain the difference between val and var in Scala.
- What is the purpose of the 'case' keyword in Scala?
- What are the advantages of using the 'Option' type over null in Scala?