Verified 1Z0-819 dumps Q&As – 2025 Latest 1Z0-819 Download [Q80-Q104]

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Verified 1Z0-819 dumps Q&As – 2025 Latest 1Z0-819 Download

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To prepare for the Oracle 1Z0-819 exam, you can take advantage of a variety of resources, including official Oracle study materials, online courses, practice exams, and study groups. You can also gain practical experience by working on Java projects or contributing to open-source Java projects. By investing time and effort in preparing for the exam, you can increase your chances of passing the exam and earning the Oracle Certified Professional (OCP) credential in Java SE 11 Developer.

Q80. Given the code fragment:

You want to examine whether path is a directory.
Which code inserted on line 1 will accomplish this?

BasicFileAttributes attributes = Files isDirectory (path);

BasicFileAttributes attributes =Files.getAttribute (path, ”insdirectory”);

BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class

BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);

Q81. Given:

What is known about the Sportscar class?

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.

Q82. Given:

What is the result?

An exception is thrown at runtime.

Q83. Given the code fragment:

What is the result?

-1 : 2

2 : -1

2 : 3

3 : 0

Q84. Given:

What is the result?

The compilation fails.

abdf

abd

adf

abcd

Q85. Which two statements are true about Java modules? (Choose two.)

Modular jars loaded from –module-path are automatic modules.

Any named module can directly access all classes in an automatic module.

Classes found in -classpath are part of an unnamed module.

Modular jars loaded from -classpath are automatic modules.

If a package is defined in both the named module and the unnamed module, then the package in the unnamed module is ignored.

Q86. Given:

Which three classes successfully override printOne()? (Choose three.)

Option A

Option B

Option C

Option D

Option E

Option F

Q87. Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

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

set(map.values());

super.set(List<String> map)

super.set(map.values());

set(map)

Q88. Given:

Which statement on line 1 enables this code fragment to compile?

Function function = String::toUpperCase;

UnaryOperator function = s -> s.toUpperCase();

UnaryOperator<String> function = String::toUpperCase;

Function<String> function = m -> m.toUpperCase();

Q89. Given the code fragment:

Which “for” loop produces the same output?

Option A

Option B

Option C

Option D

Q90. Given:

What is the result?

An exception is thrown at runtime.

Q91. Which two interfaces are considered to be functional interfaces? (Choose two.)
@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);
}

Explanation/Reference:

Q92. Given:

What is the result?

The compilation fails.

abdf

abd

adf

abcd

Q93. Given:

What is required to make the Foo class thread safe?

No change is required.

Make the declaration of lock static.

Replace the lock constructor call with new ReentrantLock (true).

Move the declaration of lock inside the foo method.

Reference:
/how-to-make-java-class-thread-safe

Q94. A company has an existing Java app that includes two Java 8 jar files, sales-3.10. jar and clients-10.2.jar.
The jar file ,sales -8, 10, jar reference packages in clients -10.2 jar, but clients-10.2 jar does not reference packages in sales -8.10, jar.
They have decided to modularize clients-10.2.jar.
Which module-info. Java file would work for the new library version clients-10.3 jar?

Q95. Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

B cannot be abstract.

B is a subtype of A.

A cannot be abstract.

A cannot be final.

B cannot be final.

A is a subtype of B.

Q96. Given:

Which is true?

System.out is the standard output stream. The stream is open only when System.out is called.

System.in cannot reassign the other stream.

System.out is an instance of java.io.OutputStream by default.

System.in is the standard input stream. The stream is already open.

Q97. Given:

What is the result?

Orange Juice

The compilation fails.

Orange Juice Apple Pie Lemmon Ice Raspberry Tart

The program prints nothing.

Q98. Which two statements are true about a class that is marked @Deprecated?

There Is always another class that can be used Instead of the deprecated class.

Using the class will cause the Java compiler to give a warning.

The class cannot be extended.

The author of the class wants to discourage people from using the class in any way.

Using the class Is guaranteed to cause errors at runtime.

Q99. Given:

What is the result?

Take extra care

The program prints nothing.

Take extra care
Take extra care

An exception is thrown at runtime

Q100. Given:

Which statement is equivalent to line 1?

double totalSalary = list.stream().map(e > e.getSalary() * ratio).reduce (bo).ifPresent (p > p.doubleValue());

double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).sum;

double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);

double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).reduce(starts, bo);

Q101. Given:

What is the output?

300

Exception

200

100

Q102. Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

public List<Integer> foo(Set<CharSequence> m) { … }

public ArrayList<Number> foo(Set<CharSequence> m) { … }

public List<Integer> foo(TreeSet<String> m) { … }

public List<Integer> foo(Set<String> m) { … }

public List<Object> foo(Set<CharSequence> m) { … }

public ArrayList<Integer> foo(Set<String> m) { … }

Q103. Given:

What is required to make the Foo class thread safe?

No change is required.

Make the declaration of lock static.

Replace the lock constructor call with new ReentrantLock (true).

Move the declaration of lock inside the foo method.

Q104. Given:

What is the result?

234

2134

3241

214

Loading …

Oracle 1z1-819 (Java SE 11 Developer) Exam is a challenging exam that requires extensive preparation and study. It is important to have a solid understanding of Java programming concepts and to be familiar with the exam format and types of questions that you will encounter on the exam. With the right preparation and study materials, however, you can pass the exam and earn this valuable certification.

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Verified 1Z0-819 dumps Q&As – 2025 Latest 1Z0-819 Download [Q80-Q104]

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