1Z0-816 試験問題を無料オンラインアクセス

Given:

You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?

• A.Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
• B.var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
• C.var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
• D.Stream<String> lines = Files.lines(INPUT_FILE_NAME);

Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?

• A.public String toString() { return String.valueOf(v); }
• B.public String toString() { return String.valueOf(Letter.values()[1]); }
• C.String toString() { return "200"; }
• D.public String toString() { return String.valueOf(ALPHA.v); }

Given:

Which statement on line 1 enables this code fragment to compile?

• A.UnaryOperator<String> function = String::toUpperCase;
• B.UnaryOperator function = s -> s.toUpperCase();
• C.Function<String> function = m -> m.toUpperCase();
• D.Function function = String::toUpperCase;

Assuming the Widget class has a getPrice method, this code does not compile:

Which two statements, independently, would allow this code to compile? (Choose two.)

• A.Replace line 5 with widgetStream.filter((Widget a) -> a.getPrice() > 20.00).
• B.Replace line 5 with widgetStream.filter(a -> ((Widget)a).getPrice() > 20.00).
• C.Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.
• D.Replace line 1 with List<Widget> widgetStream = widgets.stream();.

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 C
• B.Option D
• C.Option B
• D.Option A