認定試験の受験料は決して安くなく、再受験となれば費用も時間もかさみます。JPNTestの1z1-809問題集でOracle Java SE 8 Programmer IIの出題形式に慣れておけば、本番で力を発揮しやすくなります。209の問題を繰り返し解いて、万全の状態で試験に臨みましょう。

Oracle 1z1-809 試験概要:

Oracle 1z1-809 試験シラバストピック:

1z1-809試験についてよくあるご質問

Oracle Java SE 8 Programmer II 認定 1z1-809 試験問題：

問題 #1

Given:

What is the result?

A. IT:null
B. A NullPointerException is thrown at run time.
C. A compilation error occurs.
D. IT:0.0

問題 #2

Given:
public class Product {
int id; int price;
public Product (int id, int price) {
this.id = id;
this.price = price;
}
Public String toString () { return id + ":" + price;)
}
and the code fragment:
List<Product> products = new ArrayList <> (Arrays.asList(new Product(1, 10), new Product (2, 30), new Product (3, 20)); Product p = products.stream().reduce(new Product (4, 0), (p1, p2) -> { p1.price+=p2.price; return new Product (p1.id, p1.price);}); products.add(p); products.stream().parallel()
.reduce((p1, p2) - > p1.price > p2.price ? p1 : p2)
.ifPresent(System.out: :println);
What is the result?

A. 2:30
B. 4:60
C. 4:0
D. 4:602:303:201:10
E. The program prints nothing

問題 #3

Given the code fragment:

What is the result?

A. Can't logout
B. A compilation error occurs at line n1.
C. Logged out at: 2015-01-12T21:58:00Z
D. Logged out at: 2015-01-12T21:58:19.880Z

問題 #4

Which code fragment is required to load a JDBC 3.0 driver?

A. Class.forName("org.xyzdata.jdbc.NetworkDriver");
B. Connection con = DriverManager.getConnection("jdbc:xyzdata://localhost:3306/EmployeeDB");
C. Connection con = Connection.getDriver("jdbc:xyzdata://localhost:3306/EmployeeDB");
D. DriverManager.loadDriver ("org.xyzdata.jdbc.NetworkDriver");

問題 #5

Given the code fragment:

Which should be inserted into line n1 to print Average = 2.5?

A. IntStream str = IntStream.of (1, 2, 3, 4);
B. IntStream str = Stream.of (1, 2, 3, 4);
C. Stream str = Stream.of (1, 2, 3, 4);
D. DoubleStream str = Stream.of (1.0, 2.0, 3.0, 4.0);

解説：