NEW QUESTION 1
Given the code fragment:
public void recDelete (String dirName) throws IOException { File [ ] listOfFiles = new File (dirName) .listFiles();
if (listOfFiles ! = null && listOfFiles.length >0) {
for (File aFile : listOfFiles) { if (aFile.isDirectory ()) {
recDelete (aFile.getAbsolutePath ());
} else {
if (aFile.getName ().endsWith (“.class”)) aFile.delete ();
}
}
}
}
Assume that Projects contains subdirectories that contain .class files and is passed as an argument to the recDelete () method when it is invoked.
What is the result?

• A. The method deletes all the .class files in the Projects directory and its subdirectories.
• B. The method deletes the .class files of the Projects directory only.
• C. The method executes and does not make any changes to the Projects directory.
• D. The method throws an IOException.

Answer: A

NEW QUESTION 2
Given the code fragments:

and

What is the result?

• A. Video played.Game played.
• B. A compilation error occurs.
• C. class java.lang.Exception
• D. class java.io.IOException

Answer: C

NEW QUESTION 3
Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { } and the code fragment:
class App {
public void doRegister(String name, int age) throws UserException, AgeOutOfLimitException { if (name.length () < 6) {
throw new UserException ();
} else if (age >= 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println(“User is registered.”);
}
}
public static void main(String[ ] args) throws UserException { App t = new App ();

• A. t.d oRegister(“Mathew”, 60);}}What is the result?
• B. User is registered.
• C. An AgeOutOfLimitException is thrown.
• D. A UserException is thrown.
• E. A compilation error occurs in the main method.

Answer: B

NEW QUESTION 4
Given the definition of the Employee class:

and this code fragment:

What is the result?

• A. [sales:Ada, hr:Bob, sales:Bob, hr:Eva]
• B. [Ada:sales, Bob:sales, Bob:hr, Eva:hr]
• C. [hr:Eva, hr:Bob, sales:Bob, sales:Ada]
• D. [hr:Bob, hr:Eva, sales:Ada, sales:Bob]

Answer: A

NEW QUESTION 5
Given the code fragment:

What is the result?

• A. A compilation error occurs.
• B. [Java, J2EE, J2ME, JSTL, JSP]
• C. null
• D. [Java, J2EE, J2ME, JSTL]

Answer: A

NEW QUESTION 6
Given the code fragment:

What is the result?

• A. 4000 : 2000
• B. 4000 : 1000
• C. 1000 : 4000
• D. 1000 : 2000

Answer: B

NEW QUESTION 7
Given the code fragment:

What is the result?

• A. A compilation error occurs at line n2.
• B. 3
• C. 2
• D. A compilation error occurs at line n1.

Answer: A

NEW QUESTION 8
Given:
class RateOfInterest {
public static void main (String[] args) { int rateOfInterest = 0;
String accountType = “LOAN”; switch (accountType) {
case “RD”; rateOfInterest = 5; break;
case “FD”; rateOfInterest = 10; break;
default:
assert false: “No interest for this account”; //line n1
}
System.out.println (“Rate of interest:” + rateOfInterest);
}
}
and the command:
java –ea RateOfInterest What is the result?

• A. Rate of interest: 0
• B. An AssertionError is thrown.
• C. No interest for this account
• D. A compilation error occurs at line n1.

Answer: B

NEW QUESTION 9
Given the code fragment:
Path path1 = Paths.get(“/app/./sys/”); Path res1 = path1.resolve(“log”);
Path path2 = Paths.get(“/server/exe/”); Path res1 = path1.resolve(“/readme/”); System.out.println(res1); System.out.println(res2);
What is the result?

• A. /app/sys/log/readme/server/exe
• B. /app/log/sys/server/exe/readme
• C. /app/./sys/log/readme
• D. /app/./sys/log/server/exe/readme

Answer: C

NEW QUESTION 10
Given the structure of the Student table: Student (id INTEGER, name VARCHAR) Given the records from the STUDENT table:

Given the code fragment:

Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists. What is the result?

• A. The program prints Status: true and two records are deleted from the Student table.
• B. The program prints Status: false and two records are deleted from the Student table.
• C. A SQLException is thrown at runtime.
• D. The program prints Status: false but the records from the Student table are not deleted.

Answer: B

NEW QUESTION 11
Given the definition of the Book class:

Which statement is true about the Book class?

• A. It demonstrates encapsulation.
• B. It is defined using the factory design pattern.
• C. It is defined using the singleton design pattern.
• D. It demonstrates polymorphism.
• E. It is an immutable class.

Answer: A

NEW QUESTION 12
Which action can be used to load a database driver by using JDBC3.0?

• A. Add the driver class to the META-INF/services folder of the JAR file.
• B. Include the JDBC driver class in a jdbc.properties file.
• C. Use the java.lang.Class.forName method to load the driver class.
• D. Use the DriverManager.getDriver method to load the driver class.

Answer: C

NEW QUESTION 13
Given the code fragments:
class Caller implements Callable<String> { String str;
public Caller (String s) {this.str=s;}
public String call()throws Exception { return str.concat (“Caller”);}
}
class Runner implements Runnable { String str;
public Runner (String s) {this.str=s;}
public void run () { System.out.println (str.concat (“Runner”));}
}
and
public static void main (String[] args) InterruptedException, ExecutionException
{
ExecutorService es = Executors.newFixedThreadPool(2); Future f1 = es.submit (new Caller (“Call”));
Future f2 = es.submit (new Runner (“Run”)); String str1 = (String) f1.get();
String str2 = (String) f2.get(); //line n1 System.out.println(str1+ “:” + str2);
}
What is the result?

• A. The program prints: Run RunnerCall Caller : nullAnd the program does not terminate.
• B. The program terminates after printing: Run RunnerCall Caller : Run
• C. A compilation error occurs at line n1.
• D. An Execution is thrown at run time.

Answer: A

NEW QUESTION 14
Given:
final class Folder { //line n1
//line n2
public void open () { System.out.print(“Open”);
}
}
public class Test {
public static void main (String [] args) throws Exception { try (Folder f = new Folder()) {

• A. f.open();}}}Which two modifications enable the code to print Open Close? (Choose two.)
• B. Replace line n1 with:class Folder implements AutoCloseable {
• C. Replace line n1 with:class Folder extends Closeable {
• D. Replace line n1 with:class Folder extends Exception {
• E. At line n2, insert: final void close () {System.out.print(“Close”);}
• F. At line n2, insert:public void close () throws IOException { System.out.print(“Close”);}

Answer: AE

NEW QUESTION 15
Given:
interface Rideable {Car getCar (String name); } class Car {
private String name; public Car (String name) { this.name = name;
}
}
Which code fragment creates an instance of Car?

• A. Car auto = Car (“MyCar”): : new;
• B. Car auto = Car : : new;Car vehicle = auto : : getCar(“MyCar”);
• C. Rideable rider = Car : : new;Car vehicle = rider.getCar(“MyCar”);
• D. Car vehicle = Rideable : : new : : getCar(“MyCar”);

Answer: C

NEW QUESTION 16
Which statement is true about the DriverManager class?

• A. It returns an instance of Connection.
• B. it executes SQL statements against the database.
• C. It only queries metadata of the database.
• D. it is written by different vendors for their specific database.

Answer: A

Explanation: The DriverManager returns an instance of DoctrineDBALConnection which is a wrapper around the underlying driver connection (which is often a PDO instance).