Haskell Programming Interview Questions and Answers

Last updated on Feb 06, 2023
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Haskell Interview Questions

Most Frequently Asked Haskell Programming Interview Questions

Here in this article, we will be listing frequently asked Haskell Programming Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q1. What is Haskell & Why it is used for?

Haskell is a statically typed and purely function programming language, especially used for its built-in concurrency, easy integration with other languages and highly feature including libraries. The language is evolved to best evaluating expressions rather than executing instructions.

Q2. What are the advantages & disadvantages of Haskell programming?
S.no Advantages Disadvantages
1. Advance type safety compared to most mainstream languages Complicated interface
2. Includes type inference cryptic programs, sometimes complex understand
3. Offers high performance executable not suitable to make time critical applications
4. Quick prototype idea build due to the interactive environment High learning time
5. Highly expressive and concise syntax Lacks widespread implementation
6. Actively developed and improved  
Q3. What is the latest version of Haskell?

The latest version of Haskell is version 8.6.3, released in 2010. A group of develop is currently working on the next advance standard named “Haskell2020”.

Q4. What are Monads in Haskell?

In Haskell, Monad is a process to structure computations in terms of sequences and values of computations using those values. This allows the programmers to build up computations using sequential building blocks.

Q5. What are the types of polymorphism used in Haskell?
Q6. Write a program in Haskell to print “bestinterviewquestion.com.”
Q7. What are the kinds of operators used in Haskell?
There are five types of operators available in Haskell:
  • Addition Operator–Used for additional function
  • Subtraction Operator–Used for the subtraction operation
  • Multiplication Operator –Used for the multiplication operation
  • Division Operator –Used to divide two set of numbers between Haskell
  • Range / Sequence Operator –Special operator in Haskell denoted by "(..)". Used to declare a list with a sequence value.

Best Haskell interview questions to practice

Q8. What is lazy evaluation in Haskell?

It’s Haskell program evaluating method in which expressions are not evaluated when they are bound with variables, but the program evaluation is going to defer until their results are required by other computations.Simplifying it, this means call-by-name plus sharing, which is opposite to eager evaluation.

Q9. What is currying in Haskell?

In Haskell, currying is a fact where a function takes n arguments and returns it with a function with n-1 arguments. The fact works when only one argument is applied.

Q10. What is Zippers in Haskell?

Haskell Zippers are akin to cursors and allow users to traverse trees in an ordered manner. The usual operations of Zippers are up, down, right, left and edit. They are variant of a datatype and unfolds the type into its local context and its all direction extents.

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