Scala in 100 Seconds

Scala is a language that combines object-oriented and functional programming paradigms, designed by Martin Odursky. It is known for its concise syntax and ability to interoperate with Java. Scala's features include type inference, immutability, and functional programming constructs like higher-order functions and monads. The language is used in large-scale applications like Apache Spark and LinkedIn. To start with Scala, one needs to install the JVM and Scala compiler, and use SBT for building projects. Scala's functional features help in writing concise and safe code, reducing common issues like null pointer exceptions.

What is one of the main reasons Scala is considered scalable?

• It can only be used for small projects.

• It is not compatible with Java.

• It is designed to work with large-scale analytics engines like Apache Spark.

• It does not support object-oriented programming.

How does Scala handle the common Java issue of null pointer exceptions?

• By throwing an error immediately.

• By ignoring null values.

• By using the Option type to safely represent objects.

• By converting nulls to zeros.

Which of the following is a feature of Scala's functional programming?

• Everything is treated as a value.

• Variables are always mutable.

• Type inference is not supported.

• Statements and expressions are distinct.

What is the purpose of pattern matching in Scala?

• To make code less readable.

• To avoid using functions.

• To handle exceptions.

• To create concise and readable code.

What foundational skills are important for mastering functional programming in Scala?

• A strong foundation in math and problem-solving.

• Knowledge of multiple programming languages.

• Familiarity with database management.

• Experience with web development.