InterviewAiHubScala Interview Questions
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What is Scala and how does it differ from Java?
Scala is a modern, multi-paradigm programming language that combines functional and object-oriented features.
It compiles to JVM bytecode and is fully interoperable with Java.
Scala is more expressive, concise, and type-safe than Java.
It supports higher-order functions, pattern matching, and immutable data structures by default.
It is used in big data, distributed systems, and functional programming.
What is the difference between vals and vars in Scala?
In Scala, val defines immutable values, while var allows reassignment.
Immutability is encouraged for thread safety and functional programming.
Values are preferred in functional programming, while variables are used when state changes are needed.
Understanding immutability helps write safer, more maintainable code.
It is a core principle in functional programming and preferred in functional codebases.
What is pattern matching in Scala?
Pattern Matching is a powerful functional construct in Scala for conditionals and extracting data from case classes and ADTs (algebraic data types).
It resembles a switch-case but is more expressive, supporting type-based matching and destructuring of case class fields.
It is used in functional programming, data extraction, and error handling.
Pattern matching improves code readability and expressiveness in functional codebases.
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