Free Oracle 1Z0-805 Exam Dumps Questions & Answers

What are two benefits of a Factory design pattern?

• A.Eliminates the need to overload constructors in a class implementation
• B.Eliminates direct constructor calls in favor of invoking a method
• C.Prevents tight coupling between your application and a class implementation
• D.Provides a mechanism to monitor objects for changes
• E.Prevents the compile from complaining about abstract method signatures

Given the code fragment:
List<Person> pList = new CopyOnWriteArrayList<Person>();
Which statement is true?

• A.A Person object retrieved from the List is copied when written to.
• B.Person objects retrieved from the List are thread-safe.
• C.Write access to the List should be synchronized.
• D.Read access to the List should be synchronized.
• E.Multiple threads can safely delete Person objects from the List.

Given the code fragment:
public static void main(String[] args) {
String source = "d:\\company\\info.txt";
String dest = "d:\\company\\emp\\info.txt";
//insert code fragment here Line **
} catch (IOException e) {
System.err.println ("Caught IOException: " + e.getmessage();
}
}
Which two try statements, when inserted at line **, enable the code to successfully move the file info.txt to the destination directory, even if a file by the same name already exists in the destination directory?

• A.try {FileChannel in = new FileInputStream(source).getChannel();
  FileChannel out = new FileOutputStream(dest).getChannel ();
  in.transferTo (0, in.size(), out);
• B.try {Files.copy(Paths.get(source), Paths.get(dest));
  Files.delete(Paths.get(source));
• C.try {BufferedReader br = Files.newBufferedReader(Paths.get(source), Charset.forName ("UTF-
  8"));
  BufferedWriter bw = Files.newBufferedWriter (Paths.get(dest), Charset.forName ("UTF-8"));
  String record = "";
  while ((record = br.readLine()) != null){
  bw.write (record);
  bw.newLine();
  }
  Files.delete(Paths.get(source));
• D.try {Files.move (Paths.get(source), Paths.get(dest));
• E.try {Files.copy(Paths.get(source), Paths.get(dest));
  Files.delete(Paths.get(source));

Given the code fragment:
SimpleDateFormat sdf;
Which code fragment displays the three-character month abbreviation?

• A.sdf = new SimpleDateFormat ("MMM", Locale.UK); System.out.println ("Result: " + sdf.format(new Date()));
• B.sdf = new SimpleDateFormat ("MMMM", Locale.UK); System.out.println ("Result: " + sdf.format(new Date()));
• C.sdf = new SimpleDateFormat ("mm", Locale.UK); System.out.println ("Result: " + sdf.format(new Date()));
• D.sdf = new SimpleDateFormat ("MM", Locale.UK); System.out.println ("Result: " + sdf.format(new Date()));

Which two statements are true about the walkFileTree method of the files class?

• A.By default, symbolic links are not automatically followed by the method.
• B.The file tree traversal is breadth-first with the given FileVisitor invoked for each file encountered.
• C.If the file is a directory, and if that directory could not be opened, the postVisitFileFailed method is invoked with the I/O exception.
• D.The maxDepth parameter's value is the maximum number of directories to visit.