[Sep 21, 2024] Free Oracle 1z1-819 Exam Questions & Answer [Q124-Q142]

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[Sep 21, 2024] Free Oracle 1z1-819 Exam Questions and Answer

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Oracle 1z1-819 exam is a certification exam for Java developers who want to demonstrate their proficiency in Java SE 11 development. 1z1-819 exam is designed to test the knowledge and skills of developers in various areas, including Java syntax and constructs, object-oriented programming, concurrency, I/O and NIO API, JDBC API, and more. Candidates who pass 1z1-819 exam will earn the Oracle Certified Professional: Java SE 11 Developer certification.

To take the Oracle 1z1-819 exam, you must have a solid understanding of Java programming concepts, including object-oriented programming, data types, control structures, and error handling. You should also be familiar with the Java SE 11 API, including the core libraries and tools available for developing Java applications. Additionally, you should have experience working with Java development environments such as IntelliJ IDEA, Eclipse, or NetBeans.

NEW QUESTION 124
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

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.

NEW QUESTION 125
Given:

executed using this command:
java Myclass My Car is red
What is the output of this class?

Car–red–My

My–Car–is

My–is–java

java–Myclass–My

Myclass–Car–red

NEW QUESTION 126
Given:

Which is true?

The compilation fails due to an error in line 6.

The compilation succeeds.

The compilation fails due to an error in line 4.

The compilation fails due to an error in line 10.

The compilation fails due to an error in line 7.

The compilation fails due to an error in line 9.

The compilation fails due to an error in line 2.

NEW QUESTION 127
Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

Consumer consumer = msg -> { return System.out.print(msg); };

Consumer consumer = var arg > {System.out.print(arg);};

Consumer consumer = (String args) > System.out.print(args);

Consumer consumer = System.out::print;

NEW QUESTION 128
Given:

Which three are correct? (Choose three.)

b1.foo(li) prints Hello world!

f1.foo(li) prints Bonjour le monde!

f1.foo(li) prints Hello world!

f1.foo(li) prints Hola Mundo!

b1.foo(li) prints Bonjour le monde!

f2.foo(li) prints Hola Mundo!

f2.foo(li) prints Bonjour le monde!

b1.foo(li) prints Hola Mundo!

f2.foo(li) prints Hello world!

NEW QUESTION 129
Given:

What is the result?

An exception is thrown at runtime.

NEW QUESTION 130
Given the code fragment:

What is the result?

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

NEW QUESTION 131
Given the declaration:

Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)

@Resource({“Customer1”, “Customer2”})

@Resource(value={{}})

@Resource

@Resource(“Customer1”)

@Resource()

NEW QUESTION 132
A bookstore’s sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?

Option A

Option B

Option C

Option D

NEW QUESTION 133

A)

B)

C)

D)

Option A

Option B

Option C

Option D

NEW QUESTION 134
Which code fragment represents a valid Comparatorimplementation?

NEW QUESTION 135
Given:

What is the result?

6910 3

10126 3

6104 3

NEW QUESTION 136
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

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.

NEW QUESTION 137
Given:
jdeps -jdkinternals C:workspace4SimpleSecurityjarclasses.jar
Which describes the expected output?

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.

-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.

NEW QUESTION 138
Given:

Which two changes need to be made to make this class compile? (Choose two.)

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;

NEW QUESTION 139
Given:

Why does D cause a compilation error?

D inherits a() only from C.

D inherits a() from B and C but the return types are incompatible.

D extends more than one interface.

D does not define any method.

NEW QUESTION 140
Given:

Which two changes need to be made to make this class compile? (Choose two.)

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;

NEW QUESTION 141
Given:

Which two independent changes will make the Main class compile? (Choose two.)

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 {.

NEW QUESTION 142
Given:

What is the result?

An exception is thrown at runtime.

42=(x+y)=42

42=(x+y)=6

6=(x+y)=42

6=(x+y)=6

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[Sep 21, 2024] Free Oracle 1z1-819 Exam Questions & Answer [Q124-Q142]

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