1Z0-819無料問題集「Oracle Java SE 11 Developer」

質問 1

Which code fragment compiles?

（A）Option D

（B）Option B

（C）Option C

（D）Option A

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 2

Given the contents:
MessageBundle.properties file:
message=Hello
MessageBundle_en.properties file:
message=Hello (en)
MessageBundle_US.properties file:
message=Hello (US)
MessageBundle_en_US.properties file:
message=Hello (en_US)
MessageBundle_fr_FR.properties file:
message=Bonjour
and the code fragment:
Locale.setDefault(Locale.FRANCE);
Locale currentLocale = new Locale.Builder().setLanguage("en").build();
ResourceBundle messages = ResourceBundle.getBundle("MessageBundle", currentLocale); System.out. println(messages.getString("message")); Which file will display the content on executing the code fragment?

（A）MessageBundle_fr_FR.properties

（B）MessageBundle_US.properties

（C）MessageBundle.properties

（D）MessageBundle_en_US.properties

（E）MessageBundle_en.properties

正解：A 解答を投票する

質問 3

Given:

When run and all three files exist, what is the state of each reader on Line 1?

（A）All three readers are still open.

（B）All three readers have been closed.

（C）Only reader1 has been closed.

（D）The compilation fails.

正解：D 解答を投票する

質問 4

Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?

（A）

（B）

（C）

（D）

正解：D 解答を投票する

質問 5

Which code is correct?

（A）Runnable r = {System.out.println("Message")};

（B）Runnable r = () -> {System.out.println("Message");};

（C）Runnable r = () -> System.out::print;

（D）Runnable r = -> System.out.println("Message");

（E）Runnable r = "Message" -> System.out.println();

正解：B 解答を投票する

質問 6

Given:

What is the result?

（A）0-6
2-4

（B）1-5
2-4

（C）2-4

（D）The compilation fails due to an error in line 1.

（E）0-6
1-5
2-4

（F）0-6

（G）1-5

正解：G 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 7

Given:

What is the result?

（A）3

（B）6910 3

（C）6104 3

（D）10126 3

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

Given:

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

（A）Abacus aba = (int m, int n) -> { m * n };

（B）Abacus aba = (int i, j) -> ( return i * j; };

（C）Abacus aba = (int e, int f) -> { return e * f; };

（D）Abacus aba = v, w -> x * y;

（E）Abacus aba = (a, b) -> a * b;

正解：B、E 解答を投票する

質問 9

Given:

executed with this command:
java Main one two three
What is the output of this class?

（A）A java.lang.ArrayIndexOutOfBoundsException is thrown.

（B）1) one2) two3) three

（C）nothing

（D）The compilation fails.

（E）1) one

正解：B 解答を投票する

質問 10

Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

（A）Option D

（B）Option B

（C）Option C

（D）Option A

正解：D 解答を投票する

質問 11

A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?

（A）