Practice 1Z0-819 Exam Online

Question 1

Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?

A :

module PrintServiceProvider {

requires PrintServiceAPI;

exports org.printservice.spi;

}

B :

module PrintServiceProvider {

requires PrintServiceAPI;

provides org.printservice.spi.Print with

com.provider.PrintService;

}

C :

module PrintServiceProvider {

requires PrintServiceAPI;

uses com.provider.PrintService;

}

D :

module PrintServiceProvider {

requires PrintServiceAPI;

exports org.printservice.spi.Print with

D18912E1457D5D1DDCBD40AB3BF70D5D

com.provider.PrintService;

}

Answer: A

Question 2

Which is the correct order of possible statements in the structure of a Java class file?

A : class, package, import

B : package, import, class

C : import, package, class

D : package, class, import

E : import, class, package

Answer: B

Question 3

Why does this compilation fail?

A : The method Y. print (object) does not call the method super.print (object)

B : The method x. print (object) is not accessible to Y

C : In method x. print (Collection), system. Out :: prints is an invalid Java identifier.

D : The method print (object) and the method print (object...) are duplicates of each other.

E : The method Y. print (object...) cannot override the final method x.print (object....).

Answer: D

Question 4

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?

A : String result = fruits.stream().filter(f > f.contains(''n'')).findAny();

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

C : Optional<String> result = fruits.stream().filter(f > f.contains (''n'')).findFirst ();

D : Optional<String> result = fruits.stream().anyMatch(f > f.contains(''n''));

Answer: B

Question 5

Given:

and

What is the result?

A : A NullPointerException is thrown at run time.

B : The compilation fails.

C :

1

Null

null

D :

1

E : A ClassCastException is thrown at run time.

Answer: B

Name:	Java SE 11 Developer
Exam Code:	1Z0-819
Certification:	OPN Certified Specialist
Vendor:	Oracle
Total Questions:	263
Last Updated:	Apr 24, 2024

Oracle 1Z0-819