Scala Programming Interview Questions and Answers

Scala (scalable language) is a general-purpose programming language providing support for functional programming and a strong static type system. Designed to be concise, many of Scala’s design decisions aimed to address criticisms of Java. Scala is a pure object-oriented language in the sense that every value is an object. Types and behavior of objects are described by classes and traits. Classes are extended by sub classing and a flexible mixing-based composition mechanism as a clean replacement for multiple inheritance. Scala is also a functional language in the sense that every function is a value. Scala provides a lightweight syntax for defining anonymous functions, it supports higher-order functions, it allows functions to be nested, and supports currying. Scala’s case classes and its built-in support for pattern matching model algebraic types used in many functional programming languages. Singleton objects provide a convenient way to group functions that aren’t members of a class.class. Furthermore, Scala’s notion of pattern matching naturally extends to the processing of XML data with the help of right-ignoring sequence patterns, by way of general extension via extractor objects. In this context, for comprehensions are useful for formulating queries. These features make Scala ideal for developing applications like web services.

Scala is created by Martin Odersky (the father of javac), influenced by Java, Ruby, Smalltalk, ML, Haskell, and Erlang and was first released in 2003. It’s being used in the busiest websites like Twitter, LinkedIn, Tumblr, Netflix, and etc. present version of Scala 2.13.4/ 19 November 2020 is now available.

Scala Interview Questions

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