Online Access Free 1z0-830 Practice Test

Which of the following java.io.Console methods doesnotexist?

• A.reader()
• B.readLine(String fmt, Object... args)
• C.read()
• D.readLine()
• E.readPassword()
• F.readPassword(String fmt, Object... args)

Given:
java
DoubleSummaryStatistics stats1 = new DoubleSummaryStatistics();
stats1.accept(4.5);
stats1.accept(6.0);
DoubleSummaryStatistics stats2 = new DoubleSummaryStatistics();
stats2.accept(3.0);
stats2.accept(8.5);
stats1.combine(stats2);
System.out.println("Sum: " + stats1.getSum() + ", Max: " + stats1.getMax() + ", Avg: " + stats1.getAverage()); What is printed?

• A.Sum: 22.0, Max: 8.5, Avg: 5.5
• B.An exception is thrown at runtime.
• C.Compilation fails.
• D.Sum: 22.0, Max: 8.5, Avg: 5.0

Given:
java
sealed class Vehicle permits Car, Bike {
}
non-sealed class Car extends Vehicle {
}
final class Bike extends Vehicle {
}
public class SealedClassTest {
public static void main(String[] args) {
Class<?> vehicleClass = Vehicle.class;
Class<?> carClass = Car.class;
Class<?> bikeClass = Bike.class;
System.out.print("Is Vehicle sealed? " + vehicleClass.isSealed() +
"; Is Car sealed? " + carClass.isSealed() +
"; Is Bike sealed? " + bikeClass.isSealed());
}
}
What is printed?

• A.Is Vehicle sealed? false; Is Car sealed? true; Is Bike sealed? true
• B.Is Vehicle sealed? true; Is Car sealed? true; Is Bike sealed? true
• C.Is Vehicle sealed? false; Is Car sealed? false; Is Bike sealed? false
• D.Is Vehicle sealed? true; Is Car sealed? false; Is Bike sealed? false

Given:
var cabarets = new TreeMap<>();
cabarets.put(1, "Moulin Rouge");
cabarets.put(2, "Crazy Horse");
cabarets.put(3, "Paradis Latin");
cabarets.put(4, "Le Lido");
cabarets.put(5, "Folies Bergere");
System.out.println(cabarets.subMap(2, true, 5, false));
What is printed?

• A.{}
• B.{2=Crazy Horse, 3=Paradis Latin, 4=Le Lido}
• C.An exception is thrown at runtime.
• D.CopyEdit{2=Crazy Horse, 3=Paradis Latin, 4=Le Lido, 5=Folies Bergere}
• E.Compilation fails.

Given:
java
String colors = "red\n" +
"green\n" +
"blue\n";
Which text block can replace the above code?

• A.java
  String colors = """
  red
  green
  blue
  """;
• B.java
  String colors = """
  red \
  green\
  blue \
  """;
• C.java
  String colors = """
  red \s
  green\s
  blue \s
  """;
• D.java
  String colors = """
  red \t
  green\t
  blue \t
  """;
• E.None of the propositions