Simulation 1Z0-809 Dumps 2021

NEW QUESTION 1
Given the code fragments:

and

What is the result?

• A. The program prints Run… and throws an exception.
• B. A compilation error occurs at line n1.
• C. Run…Call…
• D. A compilation error occurs at line n2.

Answer: B

NEW QUESTION 2
Given the code fragment: UnaryOperator<Integer> uo1 = s -> s*2; line n1
List<Double> loanValues = Arrays.asList(1000.0, 2000.0); loanValues.stream()
.filter(lv -> lv >= 1500)
.map(lv -> uo1.apply(lv))
.forEach(s -> System.out.print(s + “ “)); What is the result?

• A. 4000.0
• B. 4000
• C. A compilation error occurs at line n1.
• D. A compilation error occurs at line n2.

Answer: D

NEW QUESTION 3
Given:
class CheckClass {
public static int checkValue (String s1, String s2) { return s1 length() – s2.length();
}
}
and the code fragment:
String[] strArray = new String [] {“Tiger”, “Rat”, “Cat”, “Lion”}
//line n1
for (String s : strArray) { System.out.print (s + “ “);
}
Which code fragment should be inserted at line n1 to enable the code to print Rat Cat Lion Tiger?

• A. Arrays.sort(strArray, CheckClass : : checkValue);
• B. Arrays.sort(strArray, (CheckClass : : new) : : checkValue);
• C. Arrays.sort(strArray, (CheckClass : : new).checkValue);
• D. Arrays.sort(strArray, CheckClass : : new : : checkValue);

Answer: A

NEW QUESTION 4
Given the code fragment:

What is the result?

• A. 4000 : 2000
• B. 4000 : 1000
• C. 1000 : 4000
• D. 1000 : 2000

Answer: B

NEW QUESTION 5
Given the code fragment:

What is the result ?

• A. [X][X, X][X, X, X][X, X, X, X]
• B. [X, X]
• C. [X][X, X][X, X, X]
• D. [X, X][X, X, X, X]

Answer: A

NEW QUESTION 6
Given:

Which option fails?

• A. Foo<String, Integer> mark = new Foo<String, Integer> (“Steve”, 100);
• B. Foo<String, String> pair = Foo.<String>twice (“Hello World!”);
• C. Foo<Object, Object> percentage = new Foo<String, Integer>(“Steve”, 100);
• D. Foo<String, String> grade = new Foo <> (“John”, “A”);

Answer: A

NEW QUESTION 7
Given the code fragment:
String str = “Java is a programming language”; ToIntFunction<String> indexVal = str: : indexOf; //line n1 int x = indexVal.applyAsInt(“Java”); //line n2
System.out.println(x); What is the result?

• A. 1
• B. A compilation error occurs at line n1.
• C. A compilation error occurs at line n2.

Answer: A

NEW QUESTION 8
Which class definition compiles?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: A

NEW QUESTION 9
Given the code fragment:

Which modification enables the code to print Price 5 New Price 4?

• A. Replace line n2 with .map (n -> System.out.println (“New Price” + n –1)) and remove line n3
• B. Replace line n2 with .mapToInt (n -> n – 1);
• C. Replace line n1 with .forEach (e -> System.out.print (“Price” + e))
• D. Replace line n3 with .forEach (n -> System.out.println (“New Price” + n));

Answer: A

NEW QUESTION 10
Given the code fragment:

What is the result?

• A. A compilation error occurs at line n1.
• B. courseJava
• C. Javacourse
• D. A compilation error occurs at line n2.

Answer: A

NEW QUESTION 11
Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2; //line n1 System.out.println(val.apply(10, 10.5));
What is the result?

• A. 20
• B. 20.5
• C. A compilation error occurs at line n1.
• D. A compilation error occurs at line n2.

Answer: C

NEW QUESTION 12
Given the code fragment:
List<Integer> list1 = Arrays.asList(10, 20); List<Integer> list2 = Arrays.asList(15, 30);
//line n1
Which code fragment, when inserted at line n1, prints 10 20 15 30?

• A. Stream.of(list1, list2).flatMap(list -> list.stream()).forEach(s -> System.out.print(s + “ “));
• B. Stream.of(list1, list2).flatMap(list -> list.intStream()).forEach(s -> System.out.print(s + “ “));
• C. list1.stream().flatMap(list2.stream().flatMap(e1 -> e1.stream()).forEach(s -> System.out.println(s + “ “));
• D. Stream.of(list1, list2).flatMapToInt(list -> list.stream()).forEach(s -> System.out.print(s + “ “));

Answer: A

NEW QUESTION 13
Given:
public class Canvas implements Drawable { public void draw () { }
}
public abstract class Board extends Canvas { }
public class Paper extends Canvas { protected void draw (int color) { }
}
public class Frame extends Canvas implements Drawable { public void resize () { }
}
public interface Drawable { public abstract void draw ();
}
Which statement is true?

• A. Board does not compile.
• B. Paper does not compile.
• C. Frame does not compile.
• D. Drawable does not compile.
• E. All classes compile successfully.

Answer: E

NEW QUESTION 14
Given:
class Vehicle { int vno;
String name;
public Vehicle (int vno, String name) { this.vno = vno,;
this.name = name;
}
public String toString () { return vno + “:” + name;
}
}
and this code fragment:
Set<Vehicle> vehicles = new TreeSet <> (); vehicles.add(new Vehicle (10123, “Ford”)); vehicles.add(new Vehicle (10124, “BMW”)); System.out.println(vehicles);
What is the result?

• A. 10123 Ford10124 BMW
• B. 10124 BMW10123 Ford
• C. A compilation error occurs.
• D. A ClassCastException is thrown at run time.

Answer: D

NEW QUESTION 15
Given:
public final class IceCream { public void prepare() {}
}
public class Cake {
public final void bake(int min, int temp) {} public void mix() {}
}
public class Shop {
private Cake c = new Cake (); private final double discount = 0.25;
public void makeReady () { c.bake(10, 120); }
}
public class Bread extends Cake {
public void bake(int minutes, int temperature) {} public void addToppings() {}
}
Which statement is true?

• A. A compilation error occurs in IceCream.
• B. A compilation error occurs in Cake.
• C. A compilation error occurs in Shop.
• D. A compilation error occurs in Bread
• E. All classes compile successfully.

Answer: D

NEW QUESTION 16
Given the code fragment:

Which statement can be inserted into line n1 to print 1,2; 1,10; 2,20;?

• A. BiConsumer<Integer,Integer> c = (i, j) -> {System.out.print (i + “,” + j+ “; “);};
• B. BiFunction<Integer, Integer, String> c = (i, j) –> {System.out.print (i + “,” + j+ “; “)};
• C. BiConsumer<Integer, Integer, String> c = (i, j) –> {System.out.print (i + “,” + j+ “; “)};
• D. BiConsumer<Integer, Integer, Integer> c = (i, j) –> {System.out.print (i + “,”+ j+ “; “);};

Answer: B