Given the code fragment:

Assume that dbURL, userName, and password are valid.
Which code fragment can be inserted at line n1 to enable the code to print Connection Established?

• A.Properties prop = new Properties();
  prop.put ("userid", userName);
  prop.put ("password", password);
  prop.put("url", dbURL);
  con = DriverManager.getConnection (prop);
• B.con = DriverManager.getConnection (userName, password, dbURL);
• C.con = DriverManager.getConnection (dbURL);
  con.setClientInfo ("user", userName);
  con.setClientInfo ("password", password);
• D.Properties prop = new Properties();
  prop.put ("user", userName);
  prop.put ("password", password);
  con = DriverManager.getConnection (dbURL, prop);

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Given:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException {//line n1
System.out.println("Happy Journey!");
}
}
class SolarVehicle extends Vehicle {
public void ride () throws Exception {//line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws FuelNotAvailException, Exception { Vehicle v = new SolarVehicle (); v.ride();
}
Which modification enables the code fragment to print Happy Journey!?

• A.Replace line n2 with private void ride() throws FuelNotAvailException {
• B.Replace line n1 with protected void ride() throws Exception {
• C.Replace line n1 with public void ride() throws FuelNotAvailException {
• D.Replace line n2 with void ride() throws Exception {

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Given:

Your design requires that:
* fuelLevel of Engine must be greater than zero when the start()method is invoked.
* The code must terminate if fuelLevelof Engineis less than or equal to zero.
Which code fragment should be added at line n1to express this invariant condition?

• A.assert (fuelLevel) : "Terminating...";
• B.assert (fuelLevel > 0) : System.out.println ("Impossible fuel");
• C.assert fuelLevel < 0: System.exit(0);
• D.assert fuelLevel > 0: "Impossible fuel" ;

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Given the code fragment:
Path file = Paths.get ("courses.txt");
// line n1
Assume the courses.txtis accessible.
Which code fragment can be inserted at line n1to enable the code to print the content of the courses.txt file?
List<String> fc = Files.list(file);

• A.fc.forEach (s - > System.out.println(s));
• B.fc.forEach (s - > System.out.println(s));
  List<String> fc = readAllLines(file);
• C.fc.stream().forEach (s - > System.out.println(s));
  Stream<String> fc = Files.lines (file);
• D.fc.stream().forEach (s - > System.out.println(s));
  Stream<String> fc = Files.readAllLines (file);

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Given the code fragment:

What is the result?

• A.Word: why Word: what Word: when
• B.Word: why Word: why what Word: why what when
• C.Word: why what when
• D.Compilation fails at line n1.

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