Oracle 1z0-809日本語 問題集

質問 1：
コードの断片を考えると：
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap< > ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@Override public int compare (Integer o1, Integer o2) {return
o2.compareTo
(o1); } } );
treeMap.putAll (unsortMap);
for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) {
System.out.print (entry.getValue () + " ");
}
}
}
What is the result?
A. j z e b d
B. z b d e j
C. d b e z j
D. A compilation error occurs.
正解：A

質問 2：
与えられた：
public class Canvas implements Drawable {
public void draw () { }
}
public abstract class Board extends Canvas { }
public class Paper extends Canvas {
protected void draw (int color) { }
}
public class Frame extends Canvas implements Drawable {
public void resize () { }
abstract void open ();
}
public interface Drawable {
public abstract void draw ();
}
どの文が真実ですか？
A. 紙はコンパイルされません。
B. Drawableはコンパイルされません。
C. ボードはコンパイルされません。
D. すべてのクラスが正常にコンパイルされます。
E. フレームはコンパイルされません。
正解：E

質問 3：
コードの断片を考えると：
Path source = Paths.get ("/data/december/log.txt");
Path destination = Paths.get("/data");
Files.copy (source, destination);
and assuming that the file /data/december/log.txt is accessible and
contains:
10-Dec-2014 ?Executed successfully
What is the result?
A. A file with the name log.txt is created in the /data directory and the content of the
/data/december/log.txt file is copied to it.
B. A FileNotFoundException is thrown at run time.
C. A FileAlreadyExistsException is thrown at run time.
D. The program executes successfully and does NOT change the file system.
正解：C

質問 4：
コードの断片を考えると：

結果は何ですか？
A. The code reads the password without echoing characters on the console.
B. A compilation error occurs at line n2.
C. A compilation error occurs because the IOException isn't declared to be thrown or caught?
D. A compilation error occurs at line n1.
正解：D

質問 5：
コードの断片を考えると：

結果は何ですか？
A. Compilation fails at line n1.
B. Word: why Word: what Word: when
C. Word: why Word: why what Word: why what when
D. Word: why what when
正解：D

質問 6：
Given:
Item table
ID, INTEGER: PK
DESCRIP, VARCHAR(100)
PRICE, REAL
QUANTITY< INTEGER
And given the code fragment:
9. try {
10.Connection conn = DriveManager.getConnection(dbURL, username,
password);
11. String query = "Select * FROM Item WHERE ID = 110";
12. Statement stmt = conn.createStatement();
13. ResultSet rs = stmt.executeQuery(query);
14.while(rs.next()) {
15.System.out.println("ID:" + rs.getInt("Id"));
16.System.out.println("Description:" + rs.getString("Descrip"));
17.System.out.println("Price:" + rs.getDouble("Price"));
18. System.out.println(Quantity:" + rs.getInt("Quantity"));
19.}
20. } catch (SQLException se) {
21. System.out.println("Error");
22. }
Assume that:
- The required database driver is configured in the classpath.
- The appropriate database is accessible with the dbURL, userName, and
passWord exists.
- The SQL query is valid.
What is the result?
A. The code prints Error.
B. An exception is thrown at runtime.
C. Compilation fails.
D. The code prints information about Item 110.
正解：D

質問 7：
コードの断片を考えると：

そして

結果は何ですか？
A. null
B. [Dog, Cat, Mouse]
C. A compilation error occurs.
D. DogCatMouse
正解：B

質問 8：
コードの断片を考えると：
public static void main (String [ ] args) throws IOException {
BufferedReader br = new BufferedReader (new InputStremReader
(System.in));
System.out.print ("Enter GDP: ");
//line 1
}
Which code fragment, when inserted at line 1, enables the code to read the GDP from the user?
A. int GDP = br.nextInt();
B. int GDP = Integer.parseInt (br.next());
C. int GDP = br.read();
D. int GDP = Integer.parseInt (br.readline());
正解：D