Oracle 1Z0-816 問題集

質問 1：
Which interface in the java.util.function package can return a primitive type?
A. Supplier
B. ToDoubleFunction
C. LongConsumer
D. BiFunction
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Which is a proper JDBC URL?
A. http://localhost mysql.jdbc:3306/database
B. http://localhost.mysql.com:3306/database
C. jdbc:mysql://localhost:3306/database
D. jdbe.mysql.com://localhost:3306/database
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Given:

And the command:
java Main Helloworld
What is the result ?
A. Input: Echo:
B. Input:
Then block until any input comes from System.in.
C. A NullPointerException is thrown at run time.
D. Input:
Echo: Helloworld
E. Input: Helloworld Echo: Helloworld
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 4：
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)

B)

C)

D)

A. Option A
B. Option C
C. Option D
D. Option B
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)
A. Locale.setDefault("es", Locale.US);
B. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");
C. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
D. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);
E. Locale.setDefault("en_CA");
正解：C,E
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Given:
List<String> list1 = new ArrayList<>();
list1.add("A");
list1.add("B");
List list2 = List.copyOf(list1);
list2.add("C");
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?
A. [[A, B],[A, B]]
B. An exception is thrown at run time.
C. [[A, B, C], [A, B, C]]
D. [[A, B], [A, B, C]]
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Given:

Which statement on line 1 enables this code fragment to compile?
A. Function<String> function = m -> m.toUpperCase();
B. UnaryOperator function = s -> s.toUpperCase();
C. Function function = String::toUpperCase;
D. UnaryOperator<String> function = String::toUpperCase;
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Given:
String originalPath = "data\\projects\\a-project\\..\\..\\another-project"; Path path = Paths.get(originalPath); System.out.print(path.normalize()); What is the result?
A. data\\projects\\a-project\\..\\..\\another-project
B. data\projects\a-project\..\..\another-project
C. data\another-project
D. data\projects\a-project\another-project
正解：B
解説: (Topexam メンバーにのみ表示されます)