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

Scala Interview Questions

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What is the advantage of Scala?

What is Monad in Scala?

Does Scala support all Functional Programming concepts? Does Java 8 support all Functional Programming concepts?

What is case class? What is case object? What are the Advantages of case class?

What is a ‘Scala map’?

Like Java’s java.lang.Object class, what is the super class of all classes in Scala?

In Scala, Pattern Matching follows which Design Pattern? In Java, ‘isinstanceof’ operator follows which Design Pattern?

What is the usage of isInstanceOf and asInstanceOf methods in Scala? Is there anything similar concept available in Java?

What is Diamond Problem? How Scala solves Diamond Problem?

Is Scala an Expression-Based Language or Statement-Based Language? Is Java an Expression-Based Language or Statement-Based Language?

What is Primary Constructor? What is Secondary or Auxiliary Constructor in Scala?

What is the difference between statically typed and dynamically typed languages?

What is Null in Scala? What is null in Scala? What is difference between Null and null in Scala?

Is it a Language or Platform? Does it support OOP or FP?

What is REPL in Scala? What is the use of Scala’s REPL? How to access Scala REPL from CMD Prompt?

Un-Answered Questions { Scala }

What do you understand by apply and unapply methods in scala?

What is the use of tuples in scala?

What is list in scala collection?

Explain function currying in scala?

Does a Companion object access private members of it’s Companion class in Scala?

Does scala and java support call-by-name?

What are throws in scala?

Is scala good for data science?

What is scala map function?

Tell me some features which are supported by Java, but not by Scala and Vice versa?

What is a Companion Object in Scala? What is a Companion Class in Scala? What is the use of Companion Object in Scala?

Explain recursion through a program?

Explain how to create arrays?

Explain the access modifiers available in scala?

What is string interpolation in scala?

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