1z0-809試験無料問題集（195題）「Oracle Java SE 8 Programmer II 認定」

出題：1

Given that course.txt is accessible and contains:
Course : : Java
and given the code fragment:
public static void main (String[ ] args) {
int i;
char c;
try (FileInputStream fis = new FileInputStream ("course.txt");
InputStreamReader isr = new InputStreamReader(fis);) {
while (isr.ready()) { //line n1
isr.skip(2);
i = isr.read ();
c = (char) i;
System.out.print(c);
}
} catch (Exception e) {
e.printStackTrace();
}
}
What is the result?

A. ueJa

B. A compilation error occurs at line n1.

C. The program prints nothing.

D. ur :: va

正解：A 解答を投票する

出題：2

Given that data.txt and alldata.txt are accessible, and the code fragment:

What is required at line n1 to enable the code to overwrite alldata.txt with data.txt?

A. bw.flush();

B. br.flush();

C. br.close();

D. bw.writeln();

正解：A 解答を投票する

出題：3

Given the code fragment:
List<String> listVal = Arrays.asList("Joe", "Paul", "Alice", "Tom");
System.out.println (
// line n1
);
Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?

A. listVal.stream().map(x -> x.length()>3).count()

B. listVal.stream().filter(x -> x.length()>3).count()

C. listVal.stream().filter(x -> x.length()>3).mapToInt(x -> x).count()

D. listVal.stream().peek(x -> x.length()>3).count().get()

正解：B 解答を投票する

出題：4

You want to create a singleton class by using the Singleton design pattern.
Which two statements enforce the singleton nature of the design? (Choose two.)

A. Make the constructor private.

B. Use a static reference to point to the single instance.

C. Override equals() and hashCode() methods of the java.lang.Object class.

D. Implement the Serializable interface.

E. Make the class static.

正解：A,B 解答を投票する

出題：5

Given:

and the code fragment:

What is the result?

A. An Exception is thrown at run time.

B. A compilation error occurs at line n1.

C. 2

D. 0

正解：B 解答を投票する

出題：6

Given:

and the code fragment:

Which definition of the ColorSorter class sorts the blocks list?

A. Option D

B. Option C

C. Option A

D. Option B

正解：B 解答を投票する

出題：7

Given the records from the Employee table:

and given the code fragment:
try {
Connection conn = DriverManager.getConnection (URL, userName, passWord); Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE); st.execute("SELECT*FROM Employee"); ResultSet rs = st.getResultSet(); while (rs.next()) { if (rs.getInt(1) ==112) { rs.updateString(2, "Jack");
}
}
rs.absolute(2);
System.out.println(rs.getInt(1) + " " + rs.getString(2));
} catch (SQLException ex) {
System.out.println("Exception is raised");
}
Assume that:
The required database driver is configured in the classpath.
The appropriate database accessible with the URL, userName, and passWord exists.
What is the result?

A. The program prints Exception is raised.

B. The Employee table is updated with the row:112 Jackand the program prints:112 Jerry

C. The Employee table is not updated and the program prints:112 Jerry

D. The Employee table is updated with the row:112 Jackand the program prints:112 Jack

正解：C 解答を投票する

出題：8

Given:
public interface Moveable<Integer> {
public default void walk (Integer distance) {System.out.println("Walking");) public void run(Integer distance);
}
Which statement is true?

A. Moveable can be used as below:Moveable<Integer> animal = n - > System.out.println("Running" + n);animal.run(100);animal.walk(20);

B. Moveable can be used as below:Moveable<Integer> animal = n - > n +
10;animal.run(100);animal.walk(20);

C. Movable cannot be used in a lambda expression.

D. Moveable can be used as below:Moveable animal = (Integer n) - >
System.out.println(n);animal.run(100);Moveable.walk(20);

正解：A 解答を投票する

出題：9

Given:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException {//line n1
System.out.println("Happy Journey!");
}
}
class SolarVehicle extends Vehicle {
public void ride () throws FuelNotAvailException {//line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws Exception {
Vehicle v = new SolarVehicle ();
v.ride();
}
Which modification enables the code fragment to print Happy Journey!?

A. Replace line n1 with public void ride() throws FuelNotAvailException {

B. Replace line n1 with protected void ride() throws Exception {

C. Replace line n2 with private void ride() throws FuelNotAvailException {

D. Replace line n2 with void ride() throws Exception {

正解：D 解答を投票する

出題：10

Given the code fragment:

What is the result?

A. SusanSusan[Susan, Allen]

B. DavidAllen[Susan]

C. SusanAllen[David]

D. DavidDavid[Susan, Allen]

E. SusanAllen[Susan, David]

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

1z0-809試験無料問題集「Oracle Java SE 8 Programmer II 認定」