Oracle 1Z0-805 問題集

質問 1：
Given the error message when running you application:
Exception in thread "main" java.util.MissingResourceException: can't find bundle for base name messageBundle, Locale
And given that the Message Bundle.properties file has been created, exists on your disk, and is properly formatted.
What is the cause of the error message?
A. The file is not in the JJAVAPATH.
B. The file is not in the environment PATH.
C. You cannot use a file to store a ResourceBundle.
D. The file is not in the CLASSPATH.
正解：D

質問 2：
Which two fragments can be combined into a statement that returns an ExecuteService instance?
A. Executor
B. .getSingleThreadExecutor ();
C. ExecutorService
D. .buildSingleThreadExecutor ();
E. .newSingleThreadExecutor ();
F. .createSingleThreadExecutor ();
G. Executors
正解：E,G
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Given:
public class SampleClass {
public static void main(String[] args) {
SampleClass sc = new SampleClass();
sc.processCD();
}
private void processCD() {
try (CDStream cd = new CDStream()) {
cd.open();
cd.read();
cd.write("lullaby");
cd.close();
} catch (Exception e) {
System.out.println("Exception thrown");
}
}
class CDStream {
String cdContents = null;
public void open() {
cdContents = "CD Contents";
System.out.println("Opened CD stream");
}
public String read() throws Exception {
throw new Exception("read error");
}
public void write(String str) {
System.out.println("CD str is: " + str);
}
public void close() {
cdContents = null;
}
What is the result?
A. Opened CD thrown
B. Exception thrown
C. Opened CD stream CD str is: lullaby
D. Compilation CD stream
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 4：
Given three resource bundles with these values set for menu1: ( The default resource bundle is
written in US English.)
English US resource Bundle
Menu1 = small
French resource Bundle
Menu1 = petit
Chinese Resource Bundle
Menu = 1
And given the code fragment:
Locale.setDefault (new Locale("es", "ES")); // Set default to Spanish and Spain
loc1 = Locale.getDefault();
ResourceBundle messages = ResourceBundle.getBundle ("messageBundle", loc1);
System.out.println (messages.getString("menu1"));
What is the result?
A. A runtime error is produced
B. :
C. Small
D. No message is printed
E. petit
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:
public class App {
public static void main (String [] args) {
path path = paths.get("C\\educations\\institute\\student\\report.txt");
system.out.printIn("getName(0): %s", path.getName(0));
system.out.prinIn("subpath(0, 2): %s" path.subpath(0, 2));
}
}
What is the result?
A. getName (0): C:\
subpath(0, 2): C:\education\report.txt
B. getName(0): report.txt subpath (0, 2): institute\student
C. getName (0): C:\
subpath(0, 2): education\institute
D. getName(0): education subpath(0, 2): education\institute
E. getName(0): education
subpath(0, 2: education\institute\student
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Given:
class Fibonacci extends RecursiveTask<Integer> {
final int n;
Fibonacci (int n) { this.n = n }
Integer compute () {
if (n <= 1)
return n;
Fibonacci f1 = new Fibonacci (n - 1);
f1.fork;
Fibonacci f2 = new Fibonacci (n - 2);
return f2.compute() + f1.join; // Line **
}
}
Assume that line ** is replaced with:
return f1.join() + f2.compute(); // Line **
What is the likely result?
A. The program produces the correct result, with similar performance to the original.
B. The program produces an incorrect result.
C. The program produces the correct result, with performance degraded to the equivalent of being single-threaded.
D. The program goes into an infinite loop.
E. An exception is thrown at runtime.
F. The program produces the correct result, with better performance than the original.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Given:
Person
public Person(int id)
public int getid()
public String getContactDetails()
public void setContactDetails(String contactDetails) public String getName()
public void setName(String name)
public Person getPerson(int id) throws Exception
public void createPerson(int id) throws Exception
public Person deletePerson(int id) throws Exception
public void updatePerson(Person p) throws Exception
Which group of methods is moved to a new class when implementing the DAO pattern?
A. public int getId ()
public String getContractDetails ()
public void setContactDetails (String ContactDetails)
public void getName ()
public Person setName (String name)
B. public int getId ()
public String getContractDetails ()
public void getName ()
public person getPerson (int id) throws Exception
C. public void setContactDetails(String contactDetails)
public void setName (String name)
D. public person getPerson(int id) throws Exception
public void createPerson (person p) throws exception
public void deleteperson(int id) throws Exception
public void updatePerson (Person p) throws Exception
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Given:
public class DataCache {
private static final DataCache instance = new DataCache ();
public static DataCache getInstance () {
return instance;
}
}
Which design pattern best describes the class?
A. Abstract Factory
B. DAO
C. Singleton
D. Composition
正解：C
解説: (Topexam メンバーにのみ表示されます)