Oracle 1Z0-805 問題集

質問 1：
Given:
public class DAOManager {
public AccountDAO getAccountDAO() {
return new AccountJDBCDAO();
}
}
Which design pattern best describes the class?
A. DAO
B. Singleton
C. Composition
D. Factory
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Given the code fragment: public class Test {
public static void main (String [] args) {
Path path1 = Paths.get("D:\\sys\\asm\\.\\data\\..\\..\\mfg\\production.log");
System.out.println(path1.normalize());
System.out.println(path1.getNameCount());
}
}
What is the result?
A. D: \sys\mfg\production.log 4
B. D:\sys\mfg\production.log 8
C. D: \\ sys\\asm\\data\\mfg\\production.log 6
D. D:\\sys\\asm\\.\\data\\. . \\mfg\\production.log 6
E. D: \\sys\\asm\\.\\data\\. . \\mfg\\production.log 8
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Given a resource bundle MessageBundle, what is the name of the default bundle file?
A. MessageBundle.properties
B. MessageBundle.java
C. MessageBundle.profile
D. MessageBundle.xml
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 4：
Given:
public static void main(String[] args) throws Exception {
try {
processFile();
} catch(Exception e) {
Throwable [] t = e.getSuppressed();
}
}
public static void processFile() throws IOException {
try (FileReader fr = new FileReader"logfilesrc.txt");
FileWriter fw = new FileWriter("logfiledest.txt")) {{
java.util.zip.ZipFile zf = new java.util.zip.ZipFile("alllogs.zip");
System.out.println("Created files for logs");
}
}
The getSuppressed method returns an array of __________.
A. All exceptions that were thrown in the processFile method but were suppressed.
B. Only runtime exceptions that were thrown in the processFile method but were not declared in throws clause.
C. Exceptions suppressed because that are not declared in the throws clause.
D. Only runtime exceptions that were thrown in the processFile method but were suppressed.
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Given the code fragment:
SimpleDateFormat sdf;
Which code fragment displays the two-digit month number?
A. sdf = new SimpleDateFormat ("MMMM", Locale.UK); System.out.printIn ( "Result: " + sdf.format(new Date()))
B. sdf = new SimpleDateFormat ("MM", Locale.UK); System.out.printIn ( "Result: " + sdf.format(new Date()))
C. sdf = new SimpleDateFormat ("mm", Locale.UK); System.out.printIn ( "Result: " + sdf.format(new Date()))
D. sdf = new SimpleDateFormat ("MMM", Locale.UK); System.out.printIn ( "Result: " + sdf.format(new Date()))
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Given:
public class TemperatureSensor {
public TemperatureSensor () {
}
public double getCurrTemp () {
// . . . method to retrieve temperature from a sensor
Return temp;
}
}
Which three changes should you make to apply the singleton design pattern to this class?
A. Change the access of the constructor to private.
B. Add a public static method that returns the class variable of type
C. Change the class to implement the singleton interface.
D. Add a method to return a singleton class type.
E. Make the class abstract.
F. Add a public constructor that takes a single argument.
G. Add a private static final variable that is initialized to new TemperatureSensor{};
正解：A,B,G
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Given the incomplete pseudo-code for a fork/join framework applications:
submit (Data) { if (Data.size < SMALL_ENOUGH) { _________(Data); // line X } else { List<Data> x = _________________(Data); // line Y for(Data d: x ______________(d); // line Z } }
And give the missing methods:
Process, submit, and splitInHalf
Which three insertions properly complete the pseudo-code?
A. Insert submit at line X
B. Insert splitHalf at line Y
C. Insert process at line Y
D. Insert process at line X
E. Insert submit at line Z
F. Insert process at line Z
G. Insert splitHalf at line X
正解：B,D,E
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Given this code fragment:
try {
String query = "SELECT * FROM Item";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSetMetaData rsmd = rs.getMetaData();
int rowCount = rsmd.getRowCount();
System.out.println ("Processing: " + rowCount + " rows.");
while (rs.next()) {
// Process each row
}
} catch (SQLException se) {
System.out.println("Error");
}
Assume that the SQL query returns records. What is the result?
A. Compilation fails.
B. The program prints Error
C. The statement at line 16 execute
D. An exception is thrown at runtime
正解：A
解説: (Topexam メンバーにのみ表示されます)