Scala Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Scala Interview Questions

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Explain the main difference between List and Stream in Scala Collection API? How do we prove that difference? When do we choose Stream?

What are the Popular Scala-Based Frameworks to develop RESTful Web Services or REST API?

What is function currying in Scala?

What are the popular MVC frameworks for Scala Language to develop Web Applications?

Mention the difference between an object and a class ?

What is the equivalent construct of Scala’s Option in Java SE 8? What is the use of Option in Scala?

What are the Scala variables?

What is the difference between :: and #:: in Scala? What is the difference between ::: and #::: in Scala?

Explain ‘Scala higher order’ functions?

What are the four types of scala identifiers ?

What is SBT? What is the best Build Tool to develop Play and Scala Applications?

What are option, some and none in scala?

Why scala prefers immutability?

How Scala supports both Highly Scalable and Highly Performance applications?

What is Option in Scala? What are Some and None? What is Option/Some/None Design Pattern in Scala?

Un-Answered Questions { Scala }

Explain pattern matching in scala through an example?

What is exception propagation in scala?

Please explain closure is scala?

Explain the difference between java and scala?

Difference between Scala’s Inner class and Java’s Inner class?

Explain streams in scala?

What is try catch in scala?

Give some examples of packages in scala?

Explain if-else-if terminology?

What is the current latest version of Scala?

Explain the difference between val and var in scala?

What are the four types of scala identifiers ?

Explain trait in scala and its uses?

What is the difference between apply and unapply methods in scala?

What is an ofdim method in scala?

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