Infosys Certified Scala Programmer

John is trying a pattern in Regular expression to get the output for the given code as "scar". Which code from the given option needs to be placed at Line1 to get the required output?

Note: Assume all necessary imports have been done

object RegExDemo {
  def main(args: Array[String]) {
  //Line 1
    val str = "Scam needs to be avoided so that it does not scare public"
    println((pattern findAllIn str).mkString(","))
  }
}

Find the output for the below code
val items=List("Chain ","Pin ","HairBand")
var details="NailPolish "
items.foreach((item:String)=>details+=item)
println(details)

What is the output of the following code ?

Note: Assume necessary imports have been done

object DemoApp extends App {
def findDivision(number: Int) =
Future {
5 / number
}
val response = findDivision(0)
response.onSuccess { case value => print(value) } //Line1
Thread.sleep(5)
}

Janet is working on Scala Future and map collection concept. Help Janet predict the output for the given code.

(Assume all the necessary imports have been done.)

object ScalaFuture extends App {
 val myList = Future{List('a', 2, "hey", 3)}
 
 val result = myList.map(x => x.apply(3).equals("hey"))
 result.onSuccess {
   case x => println(x)
 }
 result.onFailure {
   case y => println("Error")
 }
}

InfySkyWave is working on a Student portal to display the winner for a quiz contest conducted in various batches. Janet is working on the following incomplete code where collections with futures is used to retreive the details in an easier way. (Assume necessary imports have been done.)

object ScalaFutList extends App {
 val f: Future[List[String]] = Future {
   List("Sharon Levin Leon", "Sneha Sweta Sherin", "John Riya Mega")
 }
 //Line 1
 val result = Await.result(f1, Duration(2, "sec"))
 println(result)
}

What code should be placed at Line 1 to get the winners as shown below?

List(Sharon, Sneha, John)

Find the below given code
object Main
{
def main(args: Array[String]): Unit = {
val stud = new Student("Sharon", "John", 80)
println(stud.fName + "\t" + stud.lName + "\t" + stud.marks)
val stud2 = new Student("Rekha")
println(stud2.fName + "\t" + stud2.lName + "\t" + stud2.marks)
}

class Student(val fName: String, val lName: String, val marks: Int)
{
def this(fName: String)
{
// Line 1
println("\nStudent Marks")
}
}
}
Choose the option which should be placed at Line 1 to avoid compilation error?

Find the below code
class Apartment(color:String)
{
def col()=color
def disp()=color + "House"
}
John is analyzing the above code and the following statements has been derived. Choose the statement which is not valid?

Which of the following options will not compile and execute successfully?
I. var covid="Corona Test"
println(covid+"is a type of test")
II. val covid:String = "Corona Test"
println(covid+" a horse ");
III. val covid='Corona Test'
println(covid=covid+Test)
IV. var covid="Corona Test"
println("Covid :"+(covid=covid+" " +covid)

Have a close look at the following code snippets and identify the correct option

trait DeductTax {
def taxCalculation1()
def taxCalculation2() = { println("version1") }
}

class SalaryUtil() extends DeductTax {
override def taxCalculation1() = { println("given implementation") } //line1
override def taxCalculation2() = { println("version2") } //line2
}

Find the output for the below code

import scala.util.{Try, Success,Failure}

object Main extends App
{
def justTry(n:Int) ={ val tryMap=Map(0->Try(0),1->Try(1), 2->Try(2), 3->Try("3"))
Try(tryMap(n))
}
for(n<-2 to 4)
{
println(justTry(n).filter(y=>y.isFailure==false))
}
}