1Z0-809 Online Practice Questions and Answers

Given the definition of the Vehicle class:

Class Vehhicle {

int distance; //line n1

Vehicle (int x) {

this distance = x;

}

public void increSpeed(int time) { //line n2

int timeTravel = time; //line n3

class Car {

int value = 0;

public void speed () {

value = distance /timeTravel;

System.out.println ("Velocity with new speed"+value+"kmph");

}

}

new Car().speed();

}

}

and this code fragment:

Vehicle v = new Vehicle (100);

A. increSpeed(60); What is the result?

B. Velocity with new speed

C. A compilation error occurs at line n1.

D. A compilation error occurs at line n2.

E. A compilation error occurs at line n3.

Given:

public class Counter {

public static void main (String[ ] args) {

int a = 10;

int b = -1;

assert (b >=1) : "Invalid Denominator";

int = a / b;

System.out.println (c);

}

}

What is the result of running the code with the -ea option?

A. -10

B. 0

C. An AssertionError is thrown.

D. A compilation error occurs.

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.

Which statement is true about java.time.Duration?

A. It tracks time zones.

B. It preserves daylight saving time.

C. It defines time-based values.

D. It defines date-based values.

Given the code fragments:

class TechName {

String techName;

TechName (String techName) {

this.techName=techName;

}

}

and

List tech = Arrays.asList (

new TechName("Java-"),

new TechName("Oracle DB-"),

new TechName("J2EE-")

);

Stream stre = tech.stream();

//line n1

Which should be inserted at line n1 to print Java-Oracle DB-J2EE-?

A. stre.forEach(System.out::print);

B. stre.map(a-> a.techName).forEach(System.out::print);

C. stre.map(a-> a).forEachOrdered(System.out::print);

D. stre.forEachOrdered(System.out::print);

Given: What is the result?

A. Bar Hello Foo Hello

B. Bar Hello Baz Hello

C. Baz Hello

D. A compilation error occurs in the Daze class.

Given the code fragment:

What is the result?

A. Word: why what when

B. Word: why Word: why what Word: why what when

C. Word: why Word: what Word: when

D. Compilation fails at line n1.

Given:

class Student {

String course, name, city;

public Student (String name, String course, String city) {

this.course = course; this.name = name; this.city = city;

}

public String toString() {

return course + ":" + name + ":" + city;

}

public String getCourse() {return course;}

public String getName() {return name;}

public String getCity() {return city;}

and the code fragment:

List stds = Arrays.asList(

new Student ("Jessy", "Java ME", "Chicago"),

new Student ("Helen", "Java EE", "Houston"),

new Student ("Mark", "Java ME", "Chicago"));

stds.stream()

.collect(Collectors.groupingBy(Student::getCourse))

.forEach(src, res) -> System.out.println(scr));

What is the result?

A. A compilation error occurs.

B. Java EE Java ME

C. [Java EE: Helen:Houston] [Java ME: Jessy:Chicago, Java ME: Mark:Chicago]

D. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago] [Java EE: Helen:Houston]

Given:

public class Counter {

public static void main (String[ ] args) {

int a = 10;

int b = -1;

assert (b >=1) : "Invalid Denominator";

int = a / b;

System.out.println (c);

}

}

What is the result of running the code with the 璬a option?

A. -10

B. 0

C. An AssertionError is thrown.

D. A compilation error occurs.

Given the code fragment:

List empDetails = Arrays.asList("100, Robin, HR", "200, Mary, AdminServices","101, Peter, HR");

empDetails.stream()

.filter(s-> s.contains("r"))

.sorted()

.forEach(System.out::println); //line n1

What is the result?

A. 100, Robin, HR 101, Peter, HR

B. E. A compilation error occurs at line n1.

C. 101, Peter, HR 200, Mary, AdminServices

D. 100, Robin, HR 200, Mary, AdminServices 101, Peter, HR