[Q61-Q79] Exam Questions and Answers for 1z1-819 Study Guide Questions and Answers!

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Exam Questions and Answers for 1z1-819 Study Guide Questions and Answers!

Java SE 11 Developer Certification Sample Questions and Practice Exam

To pass the Oracle 1Z0-819 exam, candidates must demonstrate their proficiency in various areas, including Java classes, objects, and interfaces, Java data types, control flow statements, and exception handling. They are also expected to be knowledgeable in Java I/O fundamentals, functional programming, and concurrency. Additionally, candidates must be able to demonstrate their expertise in Java collections and generics, as well as their understanding of Java database connectivity (JDBC) APIs.

NEW QUESTION 61
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

Aman Tom Peter

Tom Aman Peter

Aman Peter Tom

Tom Peter Aman

NEW QUESTION 62
Given:
var fruits = List.of(“apple”, “orange”, “banana”, “lemon”);
You want to examine the first element that contains the character n. Which statement will accomplish this?

String result = fruits.stream().filter(f > f.contains(“n”)).findAny();

fruits.stream().filter(f > f.contains(“n”)).forEachOrdered(System.out::print);

Optional<String> result = fruits.stream().filter(f > f.contains (“n”)).findFirst ();

Optional<String> result = fruits.stream().anyMatch(f > f.contains(“n”));

NEW QUESTION 63
Given:

and

Which four identifiers from the Fooand Barclasses are visible at line 1? (Choose four.)

NEW QUESTION 64
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?

NEW QUESTION 65
Given the content:

What Is the result?
A)

B)

C)

D)

E)
User Username

Option A

Option B

Option C

Option D

Option

NEW QUESTION 66
Given:

Which expression when added at line 1 will produce the output of 1.17?

float z = (float)(Math.round((float)x/y*100)/100);

float z = Math.round((int)(x/y),2);

float z = Math.round((float)x/y,2);

float z = Math.round((float)x/y*100)/(float)100;

NEW QUESTION 67
Given:

You want to calculate the average of the Player’s score.
Which statement inserted on line 1 will accomplish this?

players.stream().average().orElse(0.0);

players.stream().mapToInt(a -> a.score).average().orElse(0.0);

players.stream().mapToDouble(a -> a.score).average();

players.stream().map(a -> a.score).average();

NEW QUESTION 68
Given:

When is the readObject method called?

before this object is deserialized

after this object is deserialized

before this object Is serialized

The method is never called.

after this object is serialized

NEW QUESTION 69
Given:

What prevents this code from compiling?

The calculateSurfaceAreamethod within Cylinder must be declared default.

Cylinderis not properly calling the Rectangle and Ellipseinterfaces’ calculateSurfaceArea methods.

Cylinderrequires an implementation of calculateSurfaceAreawith two parameters.

The calculateSurfaceAreamethod within Rectangle and Ellipserequires a publicaccess modifier.

NEW QUESTION 70
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

Only a module that requires the java.se module is permitted to require the java.sql module.

Any module that requires the java.se module does not need to require the java.sql module.

Any module that attempts to require the java.se module actually requires the java.sql module instead.

Any module that requires the java.sql module does not need to require the java.se module.

NEW QUESTION 71
Given these two classes:

And given this fragment:

Which describes the fragment?

It throws IllegalMonitorStateException.

It is subject to deadlock.

It is subject to livelock.

The code does not compile.

NEW QUESTION 72
Given:

After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?