Oracle 1Z0-819 Exam Actual Questions

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SKU: 1Z0-819
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The questions for 1Z0-819 were last updated on Oct 2, 2024.

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Question No. 1

Given:

Taking into account that the order of the elements is unpredictable, what is the output?

A{am=2, first=1, mismatch=1, second=2}

B{mismatch=2, am=2, first=1, second=1}

C{l=mismatch, 2=am}

D{mismatch=1, am=2, first=1, second=1}

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Correct Answer: D

Question No. 2

Given these declarations:

and these two code fragments:

Fragment 1:

Fragment 2:

Which code fragment is preferred and why?

AFragment 1 because it is shorter.

BFragment 2 because it prevents SQL injection.

CFragment 2 because it explicitly specifies the SQL types of the column values.

DFragment 1 because it is more performant.

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Correct Answer: B

Question No. 3

Given:

How many LocalDate objects are created in this example?

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Correct Answer: A

Question No. 4

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();

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Correct Answer: B

Question No. 5

Which two expressions create a valid Java Path instance? (Choose two.)

APaths.get('foo')

BPaths.getPath('too')

CPath.get(new URI('file:///domains/oracle/test.txt'))

Dnew Path('foo')

EPaths.get(URL.create('file:///domains/oracle/test.txt'))

Show Answer

Correct Answer: A, E

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