Free Oracle 1Z0-805 Exam Dumps Questions & Answers

Which is a key aspect of composition?

• A.Method delegation
• B.Implementing the composite interface
• C.Using inheritance
• D.Creating abstract classes

Which five items are provided by the Java concurrency utilities?

• A.Atomic variables
• B.Concurrent collection sorting implementations
• C.Counting semaphores
• D.Asynchronous execution of tasks
• E.synchronized wrappers for collection classes in the java.util package,
• F.High-performance, flexible thread pools
• G.Collection classes designed for concurrent access
• H.Dynamic adjustment of thread priorities

Which code fragments print 1?

• A.String arr [] = {"1", "2", "3"};
  List <?> arrList = new LinkedList <?> (Arrays.asList (arr));
  System.out.println (arrList.get (0));
• B.String arr [] = {"1", "2", "3"};
  List <?> arrList = new LinkedList <> (Arrays.asList (arr));
  System.out.println (arrList.get (0));
• C.String arr [] = {"1", "2", "3"};
  List <? extends String > arrList = new LinkedList <> (Arrays.asList (arr));
  System.out.println (arrList.get (0));
• D.String arr [] = {"1", "2", "3"};
  List <Integer> extends String > arrList = new LinkedList <Integer> (Arrays.asList (arr));
  System.out.println (arrList.get (0));
• E.String arr [] = {"1", "2", "3"};
  List <Integer> arrList = new LinkedList <> (Arrays.asList (arr));
  System.out.println (arrList.get (0));

Given this code fragment:
ResultSet rs = null;
try (Connection conn = DriverManager. getConnection (url) ) {
Statement stmt = conn.createStatement();
rs stmt.executeQuery(query);
//-.. other methods } } catch (SQLException se) {
System.out.println ("Error");
}
Which object is valid after the try block runs?

• A.The Connection object only
• B.The Result set object only
• C.Neither the Connection, Statement, nor ResultSet objects
• D.The connection, statement, and ResultSet objects
• E.The Statement object only
• F.The Statement and Result Set object only

Given the code fragment:
public void processFile() throws IOException, ClassNotFoundException {
try (FileReader fr = new FileReader ("logfilesrc.txt");
FileWriter fw = new FileWriter ("logfiledest.txt")) {
Class c = Class.forName ("java.lang.JString");
}
}
If exception occur when closing the FileWriter object and when retrieving the JString class object,
which exception object is thrown to the caller of the processFile method?

• A.java.io.IOException
• B.java.lang.Exception
• C.java.lang.NoSuchClassException
• D.java.lang.ClassNotException