80+ Scala Interview Questions for Your Job

Scala Interview Questions for Your Job

Scala Interview Questions

1) What is Scala?

Scala is a broadly useful programming language. It underpins object-situated, useful and basic programming approaches. It is a solid static sort language. In Scala, everything is an article whether it is a capacity or a number. It was structured by Martin Odersky in 2004.

2) What are the highlights of Scala?

There are following highlights in Scala:
  • Type induction: In Scala, you don't require to make reference to information type and capacity return type unequivocally.
  • Singleton object: Scala utilizes a singleton object, which is basically class with just a single article in the source document.
  • Permanence: Scala utilizes unchanging nature idea. Changeless information oversees simultaneousness control which requires overseeing information.
  • Sluggish calculation: In Scala, calculation is languid naturally. You can announce a sluggish variable by utilizing the lethargic watchword. It is utilized to expand execution.
  • Case classes and Pattern coordinating: In Scala, case classes bolster design coordinating. Along these lines, you can compose progressively legitimate code.
  • Simultaneousness control: Scala gives a standard library which incorporates the performer demonstrate. You can compose simultaneousness code by utilizing the performing artist.
  • String insertion: In Scala, string introduction enables clients to install variable references straightforwardly in handled string literals.
  • Higher request work: In Scala, higher request work enables you to make work arrangement, lambda work or unknown capacity, and so forth.
  • Qualities: An attribute resembles an interface with fractional execution. In Scala, the quality is an accumulation of conceptual and non-theoretical strategies.
  • Rich arrangement of accumulation: Scala gives a rich arrangement of gathering library. It contains classes and attributes to gather information. These accumulations can be changeable or unchanging.

3) What are the Data Types in Scala?

Information types in Scala are much like Java in regards to their capacity, length, then again, actually in Scala there is no understanding of crude information types each sort is an article and begins with capital letter. A table of information types is given underneath.

4) What is design coordinating?

Example coordinating is a component of Scala. It works same as switch case in different dialects.

5) What is for-understanding in Scala?

In Scala, for circle is known with respect to cognizances. It tends to be utilized to emphasize, channel and return an iterated accumulation. The for-cognizance looks somewhat like a for-circle in basic dialects, then again, actually it develops a rundown of the aftereffects everything being equal.

6) What is the flimsy technique in Scala?

In Scala, there is no break explanation, however you can do it by utilizing break technique and bringing in Scala.util.control.Breaks._ bundle. It can break your code.

7) How to pronounce a capacity in Scala?

In Scala, capacities are top notch esteems. You can store work esteem, pass a capacity as a contention and return work as an incentive from other capacity. You can make a capacity by utilizing the def catchphrase. You should make reference to return sort of parameters while characterizing a capacity and return kind of a capacity is discretionary. In the event that you don't determine the arrival kind of a capacity, default return type is Unit.

Scala Function Declaration Syntax
def functionName(parameters : typeofparameters) : returntypeoffunction = {
/explanations to be executed}

8) Why do we use =(equal) administrator in Scala work?

You can make a capacity with or without = (level with) administrator. On the off chance that you use it, the capacity will return esteem. On the off chance that you don't utilize it, your capacity won't return anything and will work like the subroutine.
Precedent
object MainObject {
def main(args: Array[String]) {
var result = functionExample()/Calling capacity
println(result)
}
def functionExample() = {/Defining a capacity
var a = 10
a
}}

9) What is the Function parameter with a default an incentive in Scala?

Scala gives an element to allot default esteems to work parameters. It helps in the situation when you don't pass an incentive amid capacity calls. It utilizes default estimations of parameters.
Model
object MainObject {
def main(args: Array[String]) = {
var result1 = functionExample(15,2)/Calling with two qualities
var result2 = functionExample(15)/Calling with one esteem
var result3 = functionExample()/Calling with no esteem
println(result1+"\n"+result2+"\n"+result3)
}
def functionExample(a:Int = 0, b:Int = 0):Int = {/Parameters with default esteems as 0
a+b
}}

10) What is a capacity named parameter in Scala?

In Scala work, you can indicate the names of parameters while calling the capacity. You can pass named parameters in any request and can likewise pass esteems as it were.
Model
object MainObject {
def main(args: Array[String]) = {
var result1 = functionExample(a = 15, b = 2)/Parameters names are passed amid call
var result2 = functionExample(b = 15, a = 2)/Parameters request have changed amid call
var result3 = functionExample(15,2)/Only qualities are passed amid call
println(result1+"\n"+result2+"\n"+result3)
}
def functionExample(a:Int, b:Int):Int = {
a+b
}}

11) What is a higher request work in Scala?

Higher request work is a capacity that either accepts a capacity as a contention or returns a capacity. At the end of the day, we can say a capacity which works with capacity is known as a higher-request work.
Precedent
object MainObject {
def main(args: Array[String]) = {
functionExample(25, multiplyBy2)/Passing a capacity as parameter
}
def functionExample(a:Int, f:Int=>AnyVal):Unit = {
println(f(a))/Calling that work
}
def multiplyBy2(a:Int):Int = {
a*2
}}

12) What is work sythesis in Scala?

In Scala, capacities can be created from different capacities. It is a procedure of forming in which a capacity speaks to the use of two created capacities.
Precedent
object MainObject {
def main(args: Array[String]) = {
var result = multiplyBy2(add2(10))/Function arrangement
println(result)
}
def add2(a:Int):Int = {
a+2
}
def multiplyBy2(a:Int):Int = {
a*2
}}

13) What is Anonymous (lambda) Function in Scala?

A mysterious capacity is a capacity that has no name however fills in as a capacity. It is a great idea to make a mysterious capacity when you would prefer not to reuse it later. You can make unknown capacity either by utilizing ⇒ (rocket) or _ (underscore) special case in Scala.
Precedent
object MainObject {
def main(args: Array[String]) = {
var result1 = (a:Int, b:Int) => a+b/Anonymous capacity by utilizing => (rocket)
var result2 = (_:Int)+(_:Int)/Anonymous capacity by utilizing _ (underscore) special case
println(result1(10,10))
println(result2(10,10))
}}

14) What is a multiline articulation in Scala?

Articulations those are written in different lines are called multiline articulation. In Scala, be watchful while utilizing multiline articulations.
Precedent
def add1(a:Int, b:Int) = {
a+b}
The above program does not assess the total articulation and return b here.

15) What is work currying in Scala?

In Scala, the strategy may have various parameter records. At the point when a technique is called with a less number of parameter records, this will yield a capacity taking the missing parameter records as its contentions.
Model
object MainObject {
def add(a:Int)(b:Int) = {
a+b}
def main(args: Array[String]) = {
var result = add(10)(10)
println("10 + 10 = "+result)
var addIt = add(10)_
var result2 = addIt(3)
println("10 + 3 = "+result2)
}}

16) What is a nexted work in Scala?

In Scala, you can characterize the capacity of variable length parameters. It enables you to pass any number of contentions at the season of calling the capacity.
Model
object MainObject {
def add(a:Int, b:Int, c:Int) = {
def add2(x:Int,y:Int) = {
x+y
}
add2(a,add2(b,c))
}
def main(args: Array[String]) = {
var result = add(10,10,10)
println(result)
}}

17) What is an item in Scala?

The article is a genuine element. It contains state and conduct. PC, vehicle, wireless are this present reality objects. An article ordinarily has two qualities:
1) State: information estimations of an article are known as its state.
2) Behavior: usefulness that an article performs is known as its conduct.
The item in Scala is an occasion of a class. It is otherwise called runtime substance.

18) What is a class in Scala?

The class is a layout or a diagram. It is otherwise called an accumulation of objects of comparative kind.
In Scala, a class can contain:
  • Information part
  • Part strategy
  • Constructor
  • Square
  • Settled class
  • Superclass data, and so on.
Precedent
class Student{
var id:Int = 0;/All fields must be introduced
var name:String = invalid;
}
object MainObject{
def main(args:Array[String]){
var s = new Student()/Creating an item
println(s.id+" "+s.name);
}}

19) What is a mysterious article in Scala?

In Scala, you can make an unknown article. An article which has no reference name is called a mysterious item. It is a great idea to make an unknown item when you would prefer not to reuse it further.
Precedent
class Arithmetic{
def add(a:Int, b:Int){
var include = a+b;
println("sum = "+add);
}}
object MainObject{
def main(args:Array[String]){
new Arithmetic().add(10,10);
}}

20) What is a constructor in Scala?

In Scala, the constructor is certainly not an exceptional strategy. Scala gives essential and any number of assistant constructors. It is otherwise called default constructor.
In Scala, in the event that you don't indicate an essential constructor, the compiler makes a default essential constructor. Every one of the announcements of the class body treated as a major aspect of the constructor.
Scala Primary Constructor Example
class Student(id:Int, name:String){
def showDetails(){
println(id+" "+name);
}
}
object MainObject{
def main(args:Array[String]){
var s = new Student(101,"Rama");
s.showDetails()
}}

21) What is strategy over-burdening in Scala?

Scala gives strategy over-burdening highlight which enables us to characterize strategies for a similar name however having distinctive parameters or information types. It streamlines code. You can accomplish strategy over-burdening either by utilizing diverse parameter list or distinctive sorts of parameters.
Model
class Arithmetic{
def add(a:Int, b:Int){
var entirety = a+b
println(sum)
}
def add(a:Int, b:Int, c:Int){
var entirety = a+b+c
println(sum)
}}
object MainObject{
def main(args:Array[String]){
var a = new Arithmetic();
a.add(10,10);
a.add(10,10,10);
}}

22) What is this in Scala?

In Scala, this is a watchword and used to allude a present item. You can call case factors, strategies, constructors by utilizing this watchword.

23) What is Inheritance?

Legacy is an item situated idea which is utilized to reusability of code. You can accomplish legacy by utilizing expands watchword. To accomplish legacy, a class must stretch out to different class. A class which is expanded called super or parent class. A class which broadens class is called determined or base class.
Precedent
class Employee{
var salary:Float = 10000
}
class Programmer expands Employee{
var bonus:Int = 5000
println("Salary = "+salary)
println("Bonus = "+bonus)
}
object MainObject{
def main(args:Array[String]){
new Programmer()
}}

24) What is strategy superseding in Scala?

At the point when a subclass has a similar name strategy as characterized in the parent class, it is known as technique abrogating. At the point when subclass needs to give a particular execution to the strategy characterized in the parent class, it abrogates a technique from the parent class.
In Scala, you should utilize either abrogate watchword or supersede explanation to abrogate strategies from the parent class.
Model
class Vehicle{
def run(){
println("vehicle is running")
}}
class Bike broadens Vehicle{
abrogate def run(){
println("Bike is running")
}}
object MainObject{
def main(args:Array[String]){var b = new Bike()
b.run()}}

25) What is last in Scala?

Last watchword in Scala is utilized to forestall legacy of super class individuals into the determined class. You can proclaim the last factor, technique, and class too.
Scala Final Variable Example
class Vehicle{
last val speed:Int = 60
}
class Bike expands Vehicle{
supersede val speed:Int = 100
def show(){
println(speed)
}}
object MainObject{
def main(args:Array[String]){
var b = new Bike()
b.show()
}}

26) What is the last class in Scala?

In Scala, you can make a last class by utilizing the last catchphrase. A last class can't be acquired. On the off chance that you make a class last, it can't be broadened further.
Scala Final Class Example
last class Vehicle{
def show(){
println("vehicle is running")
}}
class Bike expands Vehicle{
supersede def show(){
println("bike is running")}
}
object MainObject{
def main(args:Array[String]){
var b = new Bike()
b.show()
}}

27) What is a theoretical class in Scala?

A class which is announced with the theoretical catchphrase is known as a conceptual class. A unique class can have conceptual techniques and non-dynamic strategies also. A unique class is utilized to accomplish reflection.
Precedent
theoretical class Bike{
def run()
}
class Hero expands Bike{
def run(){
println("running fine...")
}}
object MainObject{
def main(args: Array[String]){
var h = new Hero()
h.run()
}}

28) What is Scala Trait?

A characteristic resembles an interface with fractional execution. In Scala, the attribute is an accumulation of unique and non-conceptual strategies. You can make a quality that can have every single unique technique or some dynamic and some non-conceptual strategies.
Model
quality Printable{
def print()
}
class A4 broadens Printable{
def print(){
println("Hello")
}}
object MainObject{
def main(args:Array[String]){
var a = new A4()
a.print()
}}

29) What is a quality mixins in Scala?

In Scala, "quality mixins" signifies you can broaden any number of characteristics with a class or conceptual class. You can broaden just qualities or blend of attributes and class or characteristics and conceptual class.
It is important to keep up the request of mixins generally compiler tosses a mistake.
Model
quality Print{
def print()
}
unique class PrintA4{
def printA4()
}
class A6 broadens PrintA4 {
def print(){/Trait print
println("print sheet")
}
def printA4(){/Abstract class printA4
println("Print A4 Sheet")
}
}
object MainObject{
def main(args:Array[String]){
var a = new A6() with Print/You can likewise broaden quality amid article creation
a.print()
a.printA4()
}
}

30) What is the entrance modifier in Scala?

Access modifier is utilized to characterize openness of information and our code to the outside world. You can apply accessibly to class, characteristic, information part, part strategy, and constructor, and so on. Scala gives minimal availability to access to all. You can apply any entrance modifier to your code as indicated by your prerequisite.
In Scala, there are just three sorts of access modifiers.
  • No modifier
  • Ensured
  • Private

31) What is an exhibit in Scala?

In Scala, the exhibit is a blend of variable qualities. It is a file based information structure. It begins from 0 file to n-1 where n is the length of the cluster.
Scala exhibits can be conventional. That is to say, you can have an Array[T], where T is a sort parameter or conceptual sort. Scala exhibits are good with Scala successions - you can pass an Array[T] where a Seq[T] is required. Scala clusters likewise bolster all the grouping activities.
Precedent
class ArrayExample{
var arr = Array(1,2,3,4,5)/Creating single dimensional cluster
def show(){
for(a<-arr cluster="" components="" nbsp="" p="" raversing="">
println(a)
println("Third Element = "+ arr(2))/Accessing components by utilizing list
}}
object MainObject{
def main(args:Array[String]){
var a = new ArrayExample()
a.show()}

<-arr cluster="" components="" nbsp="" p="" raversing=""> 32) What is an ofDim strategy in Scala?

<-arr cluster="" components="" nbsp="" p="" raversing=""> Scala gives an ofDim strategy to make a multidimensional exhibit. The multidimensional exhibit is a cluster which stores information in network structure. You can make from two dimensional to three, four and a lot progressively dimensional exhibit as indicated by your need.
Model
class ArrayExample{
var arr = Array.ofDim[Int](2,2)/Creating multidimensional exhibit
arr(1)(0) = 15/Assigning esteem
def show(){
for(i<-0 1="" by="" circle="" components="" nbsp="" p="" raversing="" to="" utilizing="">
for(j<-0 1="" nbsp="" p="" to="">
print(" "+arr(i)(j))
}
println()
}
println("Third Element = "+ arr(1)(1))/Accessing components by utilizing record
}}
object MainObject{
def main(args:Array[String]){
var a = new ArrayExample()
a.show()}}

33) What is String in Scala?

In Scala, the string is a mix of characters, or we can say it is a succession of characters. It is record based information structure and uses a direct way to deal with store information into memory. The string is changeless in Scala like java.
Model
class StringExample{
var s1 = "Scala string model"
def show(){
println(s1)
}
}
object MainObject{
def main(args:Array[String]){
var s = new StringExample()
s.show()
}
}

34) What is string addition in Scala?

Beginning in Scala 2.10.0, Scala offers another component to make strings from your information. It is called string insertion. String interjection enables clients to insert variable references straightforwardly in prepared string literals. Scala gives three string insertion strategies: s, f and crude.
Precedent
class StringExample{
var pi = 3.14
def show(){
println(s"value of pi = $pi")
}}
object MainObject{
def main(args:Array[String]){
var s = new StringExample()
s.show()
}}

35) What does s strategy in Scala String insertion?

The s strategy for string interjection enables us to pass a variable in the string object. You don't have to utilize the + administrator to organize your yield string. This variable is assessed by the compiler and supplanted by esteem.
Model
class StringExample{
var s1 = "Scala string model"
def show(){
println(s"This is $s1")
}
}
object MainObject{
def main(args:Array[String]){
var s = new StringExample()
s.show()
}
}

36) What does f technique in Scala String interjection?

The f technique is utilized to organize your string yield. It resembles printf capacity of C language which is utilized to deliver organized yield. You can pass your factors of any kind in the print work.
Precedent
class StringExample{
var s1 = "Scala string precedent"
var adaptation = 2.12
def show(){
println(f"This is $s1%s, scala adaptation is $version%2.2f")
}
}
object MainObject{
def main(args:Array[String]){
var s = new StringExample()
s.show()
}
}

37) What does crude technique in Scala String insertion?

The crude strategy for string addition is utilized to deliver a crude string. It doesn't decipher extraordinary singe present in the string.
Model
class StringExample{
var s1 = "Scala \tstring \nexample"
var s2 = raw"Scala \tstring \nexample"
def show(){
println(s1)
println(s2)
}
}
object MainObject{
def main(args:Array[String]){
var s = new StringExample()
s.show()
}
}

38) What is exemption taking care of in Scala?

Exemption taking care of is an instrument which is utilized to deal with unusual conditions. You can likewise stay away from end of your program suddenly.
Scala makes "checked versus unchecked" exceptionally basic. It doesn't have checked special cases. All special cases are unchecked in Scala, even SQLException, and IOException.
Precedent
class ExceptionExample{
def divide(a:Int, b:Int) = {
a/b/Exception happened here
println("Rest of the code is executing...")
}}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample()
e.divide(100,0)
}}

39) What is attempt get in Scala?

Scala gives attempt and catch square to deal with the exemption. The attempt square is utilized to encase suspect code. The catch square is utilized to deal with special case happened in the attempt square. You can have any number of the attempt get hinder in your program as indicated by need.
Precedent
In this precedent, we have two cases in our catch handler. The main case will deal with just math type special case. The second case has a Throwable class which is a super-class in the special case progressive system. The second case can deal with a special case in your program. Now and then when you don't think about the kind of special case, you can utilize super-class.
class ExceptionExample{
def divide(a:Int, b:Int) = {
try{
a/b
var arr = Array(1,2)
arr(10)
}catch{
case e: ArithmeticException => println(e)
case ex: Throwable =>println("found an obscure exception"+ ex)
}
println("Rest of the code is executing...")
}
}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample()
e.divide(100,10)
}
}

40) What is at last in Scala?

The at last square is utilized to discharge assets amid special case. Assets might be a record, organize association, database association, and so forth. The at last square executes ensured.
Precedent
class ExceptionExample{
def divide(a:Int, b:Int) = {
try{
a/b
var arr = Array(1,2)
arr(10)
}catch{
case e: ArithmeticException => println(e)
case ex: Exception =>println(ex)
case th: Throwable=>println("found an obscure exception"+th)
}
finally{
println("Finaly square dependably executes")
}
println("Rest of the code is executing...")
}
}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample()
e.divide(100,10)
}
}

41) What is toss in Scala?

You can toss a special case expressly in your code. Scala gives toss watchword to toss a special case. The toss watchword for the most part used to toss a custom special case.
Precedent
class ExceptionExample2{
def validate(age:Int)={
if(age<18 nbsp="" p="">
toss new ArithmeticException("You are not qualified")
else println("You are qualified")
}
}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample2()
e.validate(10)
}
}

<18 nbsp="" p=""> 42) What is exemption proliferation in Scala?

<18 nbsp="" p=""> In Scala, you can proliferate the exemption in calling chain. At the point when a special case happens in any capacity, it searches for the handler. On the off chance that handler not accessible there, it advances to guest strategy and searches for handler there. On the off chance that handler exhibits there, handler get that exemption. On the off chance that the handler does not present, it moves to next guest strategy in calling chain. This entire procedure is known as exemption spread.

<18 nbsp="" p=""> 43) What are tosses in Scala?

<18 nbsp="" p=""> Scala gives tosses catchphrase to proclaiming the special case. You can proclaim a special case with strategy definition. It gives data to the guest work that this strategy may toss this exemption. It serves to guest capacity to deal with and encase that code in an attempt get square to maintain a strategic distance from strange end of the program. In Scala, you can either utilize tosses watchword or tosses comment to announce the exemption.
Model
class ExceptionExample4{
@throws(classOf[NumberFormatException])
def validate()={
"abc".toInt
}
}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample4()
try{
e.validate()
}catch{
case ex : NumberFormatException => println("Exception handeled here")
}
println("Rest of the code executing...")
}}

<18 nbsp="" p=""> 44) What is a custom exemption in Scala?

<18 nbsp="" p=""> In Scala, you can make your exemption. It is otherwise called custom exemptions. You should stretch out Exception class to while pronouncing custom special case class. You can make your message in custom class.
Model
class InvalidAgeException(s:String) broadens Exception(s){}
class ExceptionExample{
@throws(classOf[InvalidAgeException])
def validate(age:Int){
if(age<18 nbsp="" p="">
toss new InvalidAgeException("Not qualified")
}else{
println("You are qualified")
}}}
object MainObject{
def main(args:Array[String]){
var e = new ExceptionExample()
try{
e.validate(5)
}catch{
case e : Exception => println("Exception Occured : "+e)}
}}

45) What is an accumulation in Scala?

Scala gives a rich arrangement of accumulation library. It contains classes and attributes to gather information. These accumulations can be changeable or permanent. You can utilize them as indicated by your prerequisite.

46) What is navigable in Scala accumulation?

It is a characteristic and used to cross gathering components. It is a base characteristic for all Scala accumulations. It contains the strategies which are regular to all accumulations.

47) What does Set in Scala gathering?

It is utilized to store special components in the set. It doesn't keep up any request for putting away components. You can apply different activities on them. It is characterized in the Scala.collection.immutable bundle.
Precedent
In this precedent, we have made a set. You can make a vacant set too. We should perceive how to make a set.
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
val set1 = Set()/A vacant set
val amusements = Set("Cricket","Football","Hocky","Golf")/Creating a set with components
println(set1)
println(games)
}}

48) What does SortedSet in Scala gathering?

In Scala, SortedSet broadens Set attribute and gives arranged set components. It is valuable when you need arranged components in the Set gathering. You can sort number qualities and string too.
It is a quality, and you can apply every one of the strategies characterized in the navigable characteristic and Set attribute.
Model
import scala.collection.immutable.SortedSet
object MainObject{
def main(args:Array[String]){
var numbers: SortedSet[Int] = SortedSet(5,8,1,2,9,6,4,7,2)
numbers.foreach((element:Int)=> println(element))
}}

49) What is HashSet in Scala accumulation?

HashSet is a fixed class. It broadens AbstractSet and permanent Set quality. It utilizes hash code to store components. It neither keeps up inclusion request nor sorts the components.
Model
import scala.collection.immutable.HashSet
object MainObject{
def main(args:Array[String]){
var hashset = HashSet(4,2,8,0,6,3,45)
hashset.foreach((element:Int) => println(element+" "))
}}

50) What is BitSet in Scala?

Bitsets are sets of non-negative numbers which are spoken to as factor estimate varieties of bits stuffed into 64-bit words. The biggest number put away in it decides the memory impression of a bitset. It expands Set quality.
Model
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var numbers = BitSet(1,5,8,6,9,0)
numbers.foreach((element:Int) => println(element))
}}

51) What is ListSet in Scala accumulation?

In Scala, ListSet class executes permanent sets utilizing a rundown based information structure. In ListSet class components are put away inside in a turned around inclusion request, which implies the most up to date component is at the leader of the rundown. This accumulation is reasonable just for few components. It keeps up addition request.
Precedent
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var listset = ListSet(4,2,8,0,6,3,45)
listset.foreach((element:Int) => println(element+" "))
}}

52) What is Seq in Scala gathering?

Seq is a characteristic which speaks to filed groupings that are ensured permanent. You can get to components by utilizing their lists. It keeps up inclusion request of components.
Successions bolster numerous techniques to discover events of components or subsequences. It restores a rundown.
Precedent
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var seq:Seq[Int] = Seq(52,85,1,8,3,2,7)
seq.foreach((element:Int) => print(element+" "))
println("\nAccessing component by utilizing record")
println(seq(2))
}}

53) What is Vector in Scala gathering?

Vector is a universally useful, permanent information structure. It gives irregular access of components. It is appropriate for a huge gathering of components. It expands a unique class AbstractSeq and IndexedSeq quality.
Precedent
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var vector:Vector[Int] = Vector(5,8,3,6,9,4)/Or
var vector2 = Vector(5,2,6,3)
var vector3 = Vector.empty
println(vector)
println(vector2)
println(vector3)
}}

54) What is List in Scala Collection?

The List is utilized to store requested components. It expands LinearSeq attribute. It is a class for changeless connected records. This class is helpful for rearward in-first-out (LIFO), stack-like access designs. It looks after request, can contain copies components.
Precedent
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var list = List(1,8,5,6,9,58,23,15,4)
var list2:List[Int] = List(1,8,5,6,9,58,23,15,4)
println(list)
println(list2)
}}

55) What is the Queue in the Scala Collection?

Line executes an information structure that permits embeddings and recovering components in a first-in-first-out (FIFO) way.
In Scala, Queue is executed as a couple of records. One is utilized to embed the components and second to contain erased components. Components are added to the primary rundown and expelled from the second rundown.
Model
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var line = Queue(1,5,6,2,3,9,5,2,5)
var queue2:Queue[Int] = Queue(1,5,6,2,3,9,5,2,5)
println(queue)
println(queue2)
}}

56) What is a stream in Scala?

The stream is a lethargic rundown. It assesses components just when they are required. This is a component of Scala. Scala bolsters sluggish calculation. It builds the execution of your program.
Precedent
object MainObject{
def main(args:Array[String]){
val stream = 100 #:: 200 #:: 85 #:: Stream.empty
println(stream)
}}

57) What does Map in Scala Collection?

The guide is utilized to store components. It stores components in sets of key and qualities. In Scala, you can make a guide by utilizing two different ways either by utilizing comma isolated sets or by utilizing rocket administrator.
Model
object MainObject{
def main(args:Array[String]){
var map = Map(("A","Apple"),("B","Ball"))
var map2 = Map("A"- >"Aple","B"- >"Ball")
var emptyMap:Map[String,String] = Map.empty[String,String]
println(map)
println(map2)
println("Empty Map: "+emptyMap)
}}

58) What does ListMap in Scala?

This class executes changeless maps by utilizing a rundown based information structure. You can make void ListMap either by calling its constructor or utilizing ListMap.empty technique. It keeps up addition request and returns ListMap. This accumulation is appropriate for little components.
Precedent
import scala.collection.immutable._
object MainObject{
def main(args:Array[String]){
var listMap = ListMap("Rice"- >"100","Wheat"- >"50","Gram"- >"500")/Creating listmap with components
var emptyListMap = new ListMap()/Creating a vacant rundown map
var emptyListMap2 = ListMap.empty/Creating an unfilled rundown map
println(listMap)
println(emptyListMap)
println(emptyListMap2)
}}

59) What is a tuple in Scala?

A tuple is an accumulation of components in the arranged structure. On the off chance that there is no component present, it is called a void tuple. You can utilize a tuple to store any information. You can store comparative kind of blending type information. You can restore numerous qualities by utilizing a tuple in capacity.
Precedent
object MainObject{
def main(args:Array[String]){
var tuple = (1,5,8,6,4)/Tuple of whole number qualities
var tuple2 = ("Apple","Banana","Gavava")/Tuple of string esteems
var tuple3 = (2.5,8.4,10.50)/Tuple of buoy esteems
var tuple4 = (1,2.5,"India")/Tuple of blend type esteems
println(tuple)
println(tuple2)
println(tuple3)
println(tuple4)
}
}

60) What is a singleton object in Scala?

Singleton object is an item which is proclaimed by utilizing object catchphrase rather by class. No article is required to call strategies proclaimed inside a singleton object.
In Scala, there is no static idea. So Scala makes a singleton item to give a section point to your program execution.
Model
object Singleton{
def main(args:Array[String]){
SingletonObject.hello()/No compelling reason to make object.
}}
object SingletonObject{
def hello(){
println("Hello, This is Singleton Object")
}}

61) What is a buddy object in Scala?

In Scala, when you have a class with indistinguishable name from a singleton object, it is known as a friend class and the singleton object is known as a sidekick object. The sidekick class and its friend object both must be characterized in a similar source document.
Precedent
class ComapanionClass{
def hello(){
println("Hello, this is Companion Class.")
}}
object CompanoinObject{
def main(args:Array[String]){
new ComapanionClass().hello()
println("And this is Companion Object.")
}}

62) What are case classes in Scala?

Scala case classes are simply ordinary classes which are permanent of course and decomposable through example coordinating. It utilizes the equivalent strategy to look at occurrence basically. It doesn't utilize the new watchword to instantiate the item.
Model
case class CaseClass(a:Int, b:Int)
object MainObject{
def main(args:Array[String]){
var c = CaseClass(10,10)/Creating object of case class
println("a = "+c.a)/Accessing components of case class
println("b = "+c.b)
}}

63) What is document taking care of in Scala?

Document taking care of is a system for dealing with record activities. Scala furnishes predefined techniques to manage the record. You can make, open, compose and read the document. Scala gives a total bundle scala.io to record taking care of.
Precedent
import scala.io.Source
object MainObject{
def main(args:Array[String]){
val filename = "ScalaFile.txt"
val fileSource = Source.fromFile(filename)
for(line<-filesource .getlines="" nbsp="" p="">
println(line)
}
fileSource.close()
}}