Scala Program - VIDYA VICHAR

Welcome to your Scala Program

What is the method to sort a list in Scala?

order()

sortList()

sort()

sorted()

None

Which method is used to check if a value exists in a list in Scala?

contains()

exists()

in()

has()

None

How do you create a list in Scala?

val myList = List(1, 2, 3)

create myList = [1, 2, 3]

var myList = [1, 2, 3]

val myList = Array(1, 2, 3)

None

How do you concatenate strings in Scala?

string1.concat(string2)

string1 ++ string2

string1 + string2

concatenate(string1, string2)

None

Which method is used to retrieve a value from a map in Scala?

find()

apply()

retrieve()

get()

None

Which keyword is used to create a subclass in Scala?

extends

subclass

inherits

extendsClass

None

How do you convert a string to an integer in Scala?

parseInt()

convertToInt()

toInt()

Integer.parse()

None

What is the method to check if a map contains a key in Scala?

isDefinedAt()

hasKey()

findKey()

contains()

None

How do you check for null values in Scala?

if (value == None)

if (value is null)

if (value equals null)

if (value == null)

None

10.

Which method is used to check the length of a string in Scala?

size

length

count

len

None

11.

How do you define a variable in Scala?

def variableName = value

let variableName = value

var variableName = value

value variableName = value

None

12.

How do you define a constant value in Scala?

val constantName = value

const constantName = value

final constantName = value

var constantName = value

None

13.

What is the file extension for Scala source files?

.scalaFile

.scala

.scal

.sc

None

14.

How do you define a singleton object in Scala?

class ObjectName

object ObjectName

singleton ObjectName

static ObjectName

None

15.

How do you define a map in Scala?

def myMap = ["key1": "value1", "key2": "value2"]

create myMap = ("key1" -> "value1", "key2" -> "value2")

var myMap = {"key1": "value1", "key2": "value2"}

val myMap = Map("key1" -> "value1", "key2" -> "value2")

None

16.

How do you define an anonymous function in Scala?

(parameters) => { ... }

create (parameters) => { ... }

function(parameters) { ... }

def (parameters) = { ... }

None

17.

How do you handle exceptions in Scala?

try { ... } catch { ... }

try { ... } except { ... }

begin { ... } catch { ... }

exception { ... }

None

18.

How do you create an instance of a class in Scala?

def obj = new ClassName()

val obj = new ClassName()

create obj = new ClassName()

var obj = new ClassName()

None

19.

How do you define a case class in Scala?

create class ClassName(parameters)

case class ClassName(parameters)

val class ClassName(parameters)

def class ClassName(parameters)

None

20.

How do you create a range in Scala?

new range(1, 10)

create range = 1 to 10

val range = range(1, 10)

val range = 1 to 10

None

21.

How do you create a function in Scala?

create functionName(parameters): ReturnType { ... }

function functionName(parameters): ReturnType { ... }

new functionName(parameters): ReturnType = { ... }

def functionName(parameters): ReturnType = { ... }

None

22.

Which method is used to access elements in a tuple in Scala?

get1, get2, get3

_1, _2, _3

item1, item2, item3

first, second, third

None

23.

How do you create a tuple in Scala?

create myTuple = (1, "Scala", true)

val myTuple = (1, "Scala", true)

val myTuple = Tuple(1, "Scala", true)

val myTuple = [1, "Scala", true]

None

24.

How do you loop over a range of numbers in Scala?

for (i in 1 to 10) { ... }

foreach (i <- 1 to 10) { ... }

while (i <= 10) { ... }

for (i <- 1 to 10) { ... }

None

25.

Which method is used to print output in Scala?

println()

write()

output()

printline()

None

26.

Which method is used to filter elements in a list in Scala?

select()

filter()

find()

where()

None

27.

How do you define a lazy value in Scala?

val valueName = lazy value

lazy val valueName = value

value lazy valueName = value

def valueName = value

None

28.

How do you define a trait in Scala?

trait = TraitName

trait TraitName

abstract TraitName

interface TraitName

None

29.

How do you define an immutable list in Scala?

val myList = Array(1, 2, 3)

def myList = List(1, 2, 3)

var myList = List(1, 2, 3)

val myList = List(1, 2, 3)

None

30.

How do you import a package in Scala?

require packageName

import packageName

include packageName

use packageName

None

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