Oracle 1Z0-819 Practice Questions| TestInsights

Question 1

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

module?

Amodule PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
}

Bmodule PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}

Cmodule PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
}

Dmodule PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
}

Correct : A

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Amodule PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
}

Bmodule PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}

Cmodule PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
}

Dmodule PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
}

Question 2

Why would you choose to use a peek operation instead of a forEach operation on a Stream?

Ato process the current item and return void

Bto remove an item from the end of the stream

Cto process the current item and return a stream

Dto remove an item from the beginning of the stream

Correct : C

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Ato process the current item and return void

Bto remove an item from the end of the stream

Cto process the current item and return a stream

Dto remove an item from the beginning of the stream

Question 3

Given:

What is the output?

AShort value 25

BThe compilation fails due to an error in line 1.

CByte value 25

DObject value 25

Correct : B

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AShort value 25

BThe compilation fails due to an error in line 1.

CByte value 25

DObject value 25

Question 4

Given:

What is the output?

A1 2 [1, 2, 3, four] 3 four

B1 2 [1, 2, 3, 4] 3 4

C1 2 [1, 2, 3, 4] 3 four

D1 2 [1, 2, 3, four] 3 4

Correct : B

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A1 2 [1, 2, 3, four] 3 four

B1 2 [1, 2, 3, 4] 3 4

C1 2 [1, 2, 3, 4] 3 four

D1 2 [1, 2, 3, four] 3 4

Question 5

Given:

You want to calculate the average of the Player's score.

Which statement inserted on line 1 will accomplish this?

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

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

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

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

Correct : B

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

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

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

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

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