Scala Test 1
Which of the following expressions has the proper value?
List(1,2,3)flatMap(x=>List(x,4))
Explanation:
The correct value of the expression is List (1,4,2,4,3,4)
Scala is also known as:
Explanation:
Scala, also known as Scalable Language, is a multi-paradigm functional programming language that blends the functional and object-oriented programming paradigms.
Which of the following claims regarding Either is correct?
Explanation:
Either is a Scala function that works in the same way as an Option. The main difference is that with Either, it is possible to return a text that explains the instructions for the mistake that occurred. Either has two offspring, Right and Left, with Right being similar to the Some class and Left being similar to the None class.
Case classes are Left and Right. Is this statement true or false?
The statement is True
Choose the appropriate value from the following line of code:
"abcde" ensures that (_.length>3)
Correct answer abcde
Scala is a combination of the words:
Explanation:
Scala is a combination of the words'scalable' and 'language,' and it is notable for its ability to blend object-oriented and functional programming. Here are a few facts about Scala and why it is currently one of the most popular programming languages.
Which of the following claims about a functor in Scala is incorrect?
Explanation:
While developing in Scala, we regularly come across the phrase "functor." A functor is a very simple yet immensely powerful idea. A functor is a form of mapping between categories in theory.
Which of the following statements about Java and Scala is correct?
Explanation:
Java is a multi-platform, network-centric programming language, whereas Scala is a statically typed computer language. Scala supports modern concurrency using an actor paradigm, whereas Java supports concurrency with a thread-based architecture. Scala variables are immutable by default, but Java variables are mutable by default.
In the REPL, how do you halt execution?
Explanation:
You can exit a running REPL by using the key combination Ctrl + C and typing it twice. This sends the REPL the SIGINT, or interruption signal.
