Q1. What is a pure function?
A1. A pure function is a function where the following conditions are met:
1) The Input solely determines the output.
2) The function does not change its input.
3) The function does not do anything else except computing the output.
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This extends Scala Functional Programming basics – pure functions, referential transparency, side effects, etc.
Q1. What is a first-class function?
A1. A first-class function is a function that can be treated like a value.
1) Can be assigned to a variable as a value can be assigned to a variable.
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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 Apache Spark programming to process Big Data. 70+ FAQ Bigdata & Hadoop interview questions &
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Q1. Given the below Person.scala file with Person.calss, what will be the output?
A1. It prints the below text as when a Scala class is instantiated the statements in the body are executed after the object is constructed via the constructor defined in the class signature itself as “Person(name: String,
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This extends the Scala Class Vs. Object and Companion object interview Q&As to implement the factory method.
Q1. What is a factory method pattern?
A1. It is an Object Oriented Programming design pattern to instantiate objects. For example,
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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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Let’s see how we can wire up functions with & without currying, and then touch on functional composition.
Without currying
Here are simple functions example that add, add10, multiply and multiplyBy10 without currying.
Output:
With currying & partial application with functional composition
Note: You can also do
Output:
What is Currying?…
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