100+ FAQ Scala interview questions answered with code. Learn more about FP – 6 tips to transforming your thinking from OOP/imperative programming to functional programming (i.e. FP). Scala is very popular in Bigdata. 70+ FAQ Bigdata & Hadoop interview questions & answers with diagrams &
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This extends Q1 – Q5 Scala Functional Programming basics interview questions & answers
Q6. What is a curried function in Scala?
A6. Currying is the technique of transforming a function with multiple arguments into a function with just one argument,
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Q13. What are the different approaches in Scala to solve the following task?
Given numbers 1 to 6, and you need to extract out the odd numbers and double them, and finally print the result.
A13. There are 3 ways to solve the problem.
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Q19. What is the use of Tuples in Scala?
A19. A Tuple is an immutable collection that can hold objects of different types. In other words, it groups together logical collections of items without using a class. There are 22 Tuple class in Scala from Tuple1,
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Java has idioms like Try-Catch-Finally, Scala has idioms like 1) “Option-Some-None”, 2) Either-Left-Right 3) Try-Success-Failure.
Q27. How does Scala try to solve the problem of getting rid of null values & the “NullPointerException”?
A27. Scala provides its own type for representing optional values with “Option[A]”,
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Q33. What is a “Future” object in Scala? Is it an immutable object? A33. A Future is a holder object that holds a value (i.e. success scenario) or an exception (i.e. failure) which may become available at some point. Future represents the result of an asynchronous computation. … Read more...
