1z0-809 試験問題を無料オンラインアクセス

Which two methods from the java.util.stream.Stream interface perform a reduction operation? (Choose two.)

• A.distinct ()
• B.count ()
• C.peek ()
• D.filter ()
• E.collect ()

Given:

Which two interfaces can you use to create lambda expressions? (Choose two.)

• A.U
• B.Q
• C.T
• D.R
• E.S
• F.P

Given:
interface Rideable {Car getCar (String name); }
class Car {
private String name;
public Car (String name) {
this.name = name;
}
}
Which code fragment creates an instance of Car?

• A.Car vehicle = Rideable : : new : : getCar("MyCar");
• B.Rideable rider = Car : : new;Car vehicle = rider.getCar("MyCar");
• C.Car auto = Car ("MyCar"): : new;
• D.Car auto = Car : : new;Car vehicle = auto : : getCar("MyCar");

Given the content:

and the code fragment:

What is the result?

• A.username = Enter User Namepassword = Enter Password
• B.The program prints nothing.
• C.A compilation error occurs.
• D.username = Entrez le nom d'utilisateurpassword = Entrez le mot de passe

Given records from the Player table:

and given the code fragment:
try {
Connection conn = DriverManager.getConnection(URL, username, password); Statement st= conn.createStatement( ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); st.execute ("SELECT * FROM Player"); st.setMaxRows(2); ResultSet rs = st.getResultSet(); rs.absolute(3); while (rs.next ()) { System.out.println(rs.getInt(1) + " " + rs.getString(2));
}
} catch (SQLException ex) {
System.out.print("SQLException is thrown.");
}
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with URL, username, and password.
The SQL query is valid.
What is the result?

• A.3 Sam
• B.SQLException is thrown.
• C.The program prints nothing.
• D.2 Jack3 Sam