Oracle 1z0-819 Java SE 11 Developer Exam Practice Test

m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));

m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));

m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;

m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);

The Sportscar class is a subclass of Automobile and inherits its methods.

The Sportscar subclass cannot override setTurbo method from the superclass Automobile.

The Sportscar class is a superclass that has more functionality than the Automobile class.

The Sportscar class inherits the setTurbo method from the superclass Automobile.

final String getFirstLetter() { return A.toString(); }

static String getFirstLetter() { return Alphabet.values()[1].toString(); }

static String getFirstLetter() { return A.toString(); }

String getFirstLetter() { return A.toString(); }

@FunctionalInterface

interface InterfaceC {

public boolean equals(Object o);

int breed(int x);

int calculate(int x, int y);

}

@FunctionalInterface

interface InterfaceD {

int breed(int x);

}

@FunctionalInterface

interface InterfaceE {

public boolean equals(int i);

int breed(int x);

}

interface InterfaceA {

int GERM = 13;

public default int getGERM() { return GERM; }

}

interface InterfaceB {

int GERM = 13;

public default int getGERM() { return get(); }

private int get() { return GERM; }

public boolean equals(Object o);

int breed(int x);

map.forEach((k, v) -> set(v)));

set(map.values());

super.set(List map)

super.set(map.values());

set(map)

Replace public Color(int c) with private Color(int c).

Replace int c; with private int c;.

Replace int c; with private final int c;.

Replace enum Color implements Serializable with public enum Color.

Replace enum Color with public enum Color.

Option A

Option B

Option C

Option D

Take extra care

The program prints nothing.

Take extra care

Take extra care

An exception is thrown at runtime

A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

An implementation of country.countryDetails can be added to the main module.

To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.

To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.

It throws IllegalMonitorStateException.

It is subject to deadlock.

It is subject to livelock.

The code does not compile.

compilation error

0 5

6 13

5 12

Add extends GeneralException on line 1.

Add extends Exception on line 2.

Add extends SpecificException on line 1.

Add extends GeneralException on line 2.

Add extends Exception on line 1.

Add extends Exception on line 2.

Add extends Exception on line 1.

Add extends GeneralException on line 2.

6910 3

10126 3

3

6104 3

Option A

Option B

Option C

Option D

EUR -> 0.84

GBP -> 0.75

USD -> 1.00

CNY -> 6.42

The compilation fails.

CNY -> 6.42

EUR -> 0.84

GBP -> 0.75

USD -> 1.00

USD -> 1.00

GBP -> 0.75

EUR -> 0.84

CNY -> 6.42

s.replace(s.indexOf(“A”), s.indexOf(“C”), “Q”);

s.replace(s.indexOf(“B”), s.indexOf(“C”), “Q”);

s.replace(s.indexOf(“B”), s.indexOf(“B”), “Q”);

s.replace(s.indexOf(“A”), s.indexOf(“B”), “Q”);

Option A

Option B

Option C

Option D

Option E

Option A

Option B

Option C

Option D

Option

prefix + name

prefix + getName

new Main (} .prefix + new Main().name

prefix + Main, name

Main.prefix + Main.name

Main.prefix + Main.getName()

Code compiles but throws a runtime exception when run.

It prints 666.

The code compiles and runs successfully but with a wrong answer (i.e., a bug).

The code does not compile successfully.

nothing

It fails to compile.

0

A java.lang.IllegalArgumentException is thrown.

10

Move the entire Student class declaration to a separate Java file, Student.java.

Change line 2 to public Student(String classname).

Change line 1 to public class Student {.

Change line 3 to Student student = new Student(“Biology”);.

Change line 1 to static class Student {.

ab cd ef

An ArrayIndexOutOfBoundsException is thrown at runtime.

The compilation fails.

abc def

ad be cf

Add catch (L |N e).

Add catch (L |M N e).

Add catch (L e).

Add catch (N | L | M e).

Add catch (M |L e).

easier to understand the Java language

improves security and maintainability

easier to expose implementation details

improves application robustness

easier to build a custom runtime linking application modules and JDK modules

In Line 1, change the access modifier to privateprivate Person() {

In Line 1, change the access modifier to publicpublic Person() {

In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();

In Line 2, change the access modifier to protectedprotected class Main {

In Line 1, remove the access modifierPerson() {

null

nothing

It fails to compile.

java.lang.IllegalAccessException is thrown.

Student

jmod describe

java Hello.java

jdeps --list-deps

jar --show-module-resolution

java --show-module-resolution

Change Line 1 to an abstract class:public abstract class API {

Change Line 2 access modifier to protected:protected void checkValue(Object value)throws IllegalArgumentException;

Change Line 1 to a class:public class API {

Change Line 1 to extend java.lang.AutoCloseable:public interface API extends AutoCloseable {

Change Line 2 to an abstract method:public abstract void checkValue(Object value)throws IllegalArgumentException;

@Resource({“Customer1”, “Customer2”})

@Resource(value={{}})

@Resource

@Resource(“Customer1”)

@Resource()

1

The compilation fails at line

10

The compilation fails at line 16.

The compilation fails at line 13.

9

An exception is thrown at runtime.

3

6

Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);

Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);

Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);

Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );

Replace line 1with int sum = number.stream. parallel ( ). Reduce (0, (n, m) -> n + m);

jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.

jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.

The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.

The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

public void x() { }

public void z() { }

public void x() { }

protected void y() { super.y(); }

public void z() { }

void x() { }

public void y() { }

public void z() { }

void x() { super.y(); }

public void z() { }

void x() { }

public void z() { }

@Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3

@Override // position 2public void z() { } // position 3

implements A // position 1@Override // position 2

public void z() { } // position 3

01

0

1

The program prints nothing.

It prints 1 in the infinite loop.

[0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet

[0,0] = Red[1,0] = Black[2,0] = Blue

java.lang.ArrayIndexOutOfBoundsException thrown

[0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet