Scala Interview Questions And Answers

Scala Interview Questions list for experienced

  1. Explain what is Scala?
  2. What is a 'Scala set'? What are methods through which operation sets are expressed?
  3. What is a 'Scala map'?
  4. What is the advantage of Scala?
  5. In what ways Scala is better than other programming language?
  6. What are the Scala variables?
  7. Mention the difference between an object and a class ?
  8. What is recursion tail in scala?
  9. What is 'scala trait' in scala?
  10. When can you use traits?
  11. What is Case Classes?
  12. What is the use of tuples in scala?
  13. What is function currying in Scala?
  14. What are implicit parameters in Scala?
  15. What is a closure in Scala?
  16. What is Monad in Scala?
  17. What is Scala anonymous function?
  18. What is the difference between var and value?
  19. What are option, some and none in scala?
  20. How can you format a string?
  21. Why scala prefers immutability?
  22. What are the four types of scala identifiers ?
  23. What are the different types of Scala literals?

Scala interview questions and answers on advance and basic Scala with example so this page for both freshers and experienced condidate. Fill the form below we will send the all interview questions on Scala also add your Questions if any you have to ask and for apply in Scala Tutorials and Training course just send a mail on info@pcds.co.in in detail about your self.

Top Scala interview questions and answers for freshers and experienced

What is Scala ?

Answer : Scala is a general purpose programming language principally targeting the Java Virtual Machine. Designed to express common programming patterns in a concise, elegant, and type-safe way, it fuses both imperative and functional programming styles. Its key features are: advanced static type system with type inference; function types; pattern-matching; implicit parameters and conversions; operator overloading; full interoperability with Java; concurrenc

Questions : 1 :: Explain what is Scala?

Scala is an object functional programming and scripting language for general software applications designed to express solutions in a concise...View answers

Questions : 2 :: What is a 'Scala set'? What are methods through which operation sets are expressed?

Scala set is a collection of pairwise elements of the same type.  Scala set does not contain any duplicate elements.  There are two kinds of sets, mutable and...View answers

Questions : 3 :: What is a 'Scala map'?


Scala map is a collection of key or value pairs.  Based on its key any value can be retrieved.  Values are not unique but keys are unique in the...View answers

Questions : 4 :: What is the advantage of Scala?

a)      Less error prone functional style b)      High maintainability and productivity c)       High...View answers

Questions : 5 :: In what ways Scala is better than other programming language?

a)      The arrays uses regular generics, while in other language, generics are bolted on as an afterthought and are completely separate but have overlapping...View answers

Questions : 6 :: What are the Scala variables?


Values and variables are two shapes that come in Scala. A value variable is constant and cannot be changed once assigned.  It is immutable, while a regular variable, on the other hand,...View answers

Questions : 7 :: Mention the difference between an object and a class ?

A class is a definition for a description.  It defines a type in terms of methods and composition of other types.  A class is a blueprint of the object. While, an object is a...View answers

Questions : 8 :: What is recursion tail in scala?

‘Recursion’ is a function that calls itself. A function that calls itself, for example, a function ‘A’ calls function ‘B’, which calls the function...View answers

Questions : 9 :: What is 'scala trait' in scala?


‘Traits’ are used to define object types specified by the signature of the supported methods.  Scala allows to be partially implemented but traits may not have constructor...View answers

Questions : 10 :: When can you use traits?

There is no specific rule when you can use traits, but there is a guideline which you can consider. a)      If the behaviour will not be reused, then make it a...View answers

Questions : 11 :: What is Case Classes?

Case classes provides a recursive decomposition mechanism via pattern matching, it is a regular classes which export their constructor parameter. The constructor parameters of case classes...View answers

Questions : 12 :: What is the use of tuples in scala?

Scala tuples combine a fixed number of items together so that they can be passed around as whole. A tuple is immutable and can hold objects with different types, unlike an array or...View answers

Questions : 13 :: What is function currying in Scala?

Currying is the technique of transforming a function that takes multiple arguments into a function that takes a single argument Many of the same techniques as language like Haskell and LISP...View answers

Questions : 14 :: What are implicit parameters in Scala?

  Implicit parameter is the way that allows parameters of a method to be “found”.  It is similar to default parameters, but it has a different mechanism for finding...View answers

Questions : 15 :: What is a closure in Scala?

A closure is a function whose return value depends on the value of the variables declared outside the...View answers

Questions : 16 :: What is Monad in Scala?

A monad is an object that wraps another object. You pass the Monad mini-programs, i.e functions, to perform the data manipulation of the underlying object, instead of manipulating the...View answers

Questions : 17 :: What is Scala anonymous function?

In a source code, anonymous functions are called ‘function literals’ and at run time, function literals are instantiated into objects called function values.  Scala...View answers

Questions : 18 :: What is the difference between var and value?

In scala, you can define a variable using either a, val or var keywords.  The difference between val and var is,  var is much like java declaration, but val is little...View answers

Questions : 19 :: What are option, some and none in scala?

'Option’ is a Scala generic type that can either be ‘some’ generic value or none.  ‘Queue’ often uses it to represent primitives that may be...View answers

Questions : 20 :: How can you format a string?

To format a string, use the .format () method, in scala you can use Val formatted=  “%s %i”.format...View answers

Questions : 21 :: Why scala prefers immutability?

Scala prefers immutability in design and in many cases uses it as default. Immutability can help when dealing with equality issues or concurrent...View answers

Questions : 22 :: What are the four types of scala identifiers ?

The four types of identifiers are a)      Alpha numeric identifiers b)      Operator identifiers c)      ...View answers

Questions : 23 :: What are the different types of Scala literals?

The different types of literals in scala are a)      Integer literals b)      Floating point...View answers
More Question

Ask your interview questions on Scala

Write Your comment or Questions if you want the answers on Scala from Scala Experts
Name* :
Email Id* :
Mob no* :
Question
Or
Comment* :
 





Disclimer: PCDS.CO.IN not responsible for any content, information, data or any feature of website. If you are using this website then its your own responsibility to understand the content of the website

--------- Tutorials ---