2025 Latest 1Z0-819 dumps – Instant Download PDF [Q166-Q190]

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2025 Latest 1Z0-819 dumps – Instant Download PDF

Updated Verified 1Z0-819 Downloadable Printable Exam Dumps

Oracle 1Z0-819 exam is a certification exam designed specifically for Java developers who want to validate their skills and knowledge in Java SE 11 development. 1Z0-819 exam is one of the several exams offered by Oracle to certify Java developers, and it is a prerequisite for some advanced Java certifications.

Q166. Given:

What is the result?

At once 0

An indexOutofBoundsException is thrown at runtime.

Hat at store 4

At once 1

Hat at store 1

Q167. 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);

Q168. Given:

Which two are correct? (Choose two.)

Option A

Option B

Option C

Option D

Q169. 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

Q170. Given:

What is the result?

The compilation fails.
[0). D, | 1). i, | 2). a]

[). o, | 1). a, | 2).]

[0). o, | 1). i, | 2). r]

ArrayIndexOutOfBounds Exception is thrown at runtime.

Q171. Given:

What is the result?

WorkingUnknown

Unknown

TuesdayUnknown

The compilation fails.

Tuesday

Working

Q172. What is the result?

9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

9001: APPLICATION ERROR-9001-MyFile.txt
9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

9001: APPLICATION ERROR-9001-MyFile.txt

Compilations fails at Line 1.

Q173. Given:

What is the output?
banana orange apple lemon

—–
apple banana lemon orange
—–
—–

banana orange apple lemon
—–
apple banana lemon orange
—–

—–
—–

—–
banana orange apple lemon apple banana lemon orange
banana orange apple lemon apple banana lemon orange

—–
—–

Q174. Given the code fragment:

You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)

replace line 2 with public static synchronized void main(String[] args) {

replace line 1 with private volatile int count = 0;

replace line 3 with
synchronized(test) {
test.count++;
}

replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();

replace line 3 with
synchronized(test.count) {
test.count++;
}

Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164

Q175. Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

Option A

Option B

Option C

Option D

Option E

Q176. Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

Option A

Option B

Option C

Option D

Option E

Q177. Given the code fragment:
Which two code snippets inserted independently inside println method print Mondial:domainmodel? (Choose two.)

Main.prefix + Main.name

prefix + getName

Main.prefix + Main.getName()

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

prefix + name

prefix + Main.name

Q178. Given:

What is the result?

The compilation fails due to an error in line 4.

The compilation fails due to an error in line 3.

The compilation fails due to an error in line 2.

The compilation fails due to an error in line 1.

The compilation fails due to an error in line 5.

Q179. Given:

Which one is correct?

An IllegalThreadStateException is thrown at run time.

Three threads are created.

The compilation fails.

Four threads are created.

Q180. Given:

What is the result?

An exception is thrown at runtime.

Q181. Given:

What is the result?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

Q182. Given:

What is the result?

The compilation fails due to an error in line 1.

Q183. Which method throws an exception for not-a-number and infinite input values?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

Q184. Given:

What is the result?

is it 1

An IndexOutOfBoundsException is thrown at runtime.

is it 0

this is it 2

this is it 3

Q185. Given:

What is the result?

Ans: a

The compilation fails

Ans:

A java:util. NsuchElementException is thrown at runtime

Q186. Given:

And the command:
java Main Helloworld
What is the result ?

Input: Echo:

Input: Helloworld Echo: Helloworld

Input:
Then block until any input comes from System.in.

Input:
Echo: Helloworld

A NullPointerException is thrown at run time.

Q187. Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

Q188. Which two are functional interfaces? (Choose two.)

Option A

Option B

Option C

Option D

Option E

Q189. 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);

Q190. Given:

What is the result?

Good Morning, Potter

Good Night, Potter

Good Morning, Harry

Good Night, Harry

Loading …

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2025 Latest 1Z0-819 dumps – Instant Download PDF [Q166-Q190]

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