1Z0-819 by Oracle Actual Free Exam Q&As

Question 1

Given:
Automobile.java

Car.java

What must you do so that the code prints 4?

A. Replace the code in line 2 with Car ob = new Car(); B. Add @Override annotation in line 2. C. Remove the parameter from wheels method in line 3. D. Remove abstract keyword in line 1.

Discussion 0

Correct Answer: B Vote an answer

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Question 2

var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

A. double avg = numbers.stream().average().getAsDouble(); B. double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble (); C. double avg = numbers.stream().parallel().averagingDouble(a -> a); D. double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n)); E. double avg = numbers.stream().mapToInt (i -> i).average().parallel();

Discussion 0

Correct Answer: A,B Vote an answer

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Question 3

Given the code fragment:

What is the result?

A. false true false B. true false false C. false false true D. false true true

Discussion 0

Correct Answer: A Vote an answer

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Question 4

Given:

What is the result?

A. The compilation fails. B. 1.99,2.99,0.0 C. 1.99,2.99,0 D. 1.99,2.99

Discussion 0

Correct Answer: A Vote an answer

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Question 5

Given:

What is the result?

A. 3 B. 25 C. 385 D. The compilation fails. E. 80

Discussion 0

Correct Answer: C Vote an answer

Question 6

Given:

What is the result?

A. nothing B. 5 4 3 2 1 C. 5 D. 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1

Discussion 0

Correct Answer: A Vote an answer

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Question 7

Given:

Which two codes, independently, can be inserted in line to 1 compile?

A. Abacus aba = (a, b) -> a * b; B. Abacus aba = (int m, int n) -> { m * n }; C. Abacus aba = (int i, j) -> ( return i * j; }; D. Abacus aba = (int e, int f) -> { return e * f; }; E. Abacus aba = v, w -> x * y;

Discussion 0

Correct Answer: A,C Vote an answer

Question 8

Which two commands are used to identify class and module dependencies? (Choose two.)

A. jdeps --list-deps B. java --show-module-resolution C. java Hello.java D. jar --show-module-resolution E. jmod describe

Discussion 0

Correct Answer: A,B Vote an answer

Question 9

Given the code fragment:

What is the result?

A. 2 4 6 8 10 B. 1 3 5 7 9 C. 1 3 5 7 9 11 D. 2 4 6 8

Discussion 0

Correct Answer: B Vote an answer

Question 10

Given:

What is the result?

A. Take extra care B. The program prints nothing. C. An exception is thrown at runtime D. Take extra care
Take extra care

Discussion 0

Correct Answer: C Vote an answer

Oracle Java SE 11 Developer - 1Z0-819 Exam Practice Test