public class MyGrades {
private final List<Integer> myGrades = new ArrayList<Integer>();
private final ReadWriteLock rwlock = new ReentrantReadWriteLock();
public void addGrade(Integer grade) {
/*
lock and modify
*/
}
public void averageGrades() {
// acquire _______ lock Line **
double sum = 0;
int i = 0;
for (i = 0; i < myGrades.size(); i++) {
sum += myGrades.get(i);
}
// release __________ lock Line ***
System.out.println("The average is: " + sum/(i+1));
}
}

• A. rwlock.writeLock().lock(); rwlock.WriteLock().unlock();
• B. rwlock.readLock().acquire(); rwlock.readLock().release();
• C. rwlock.getLock().acquire();
  rwlock.getLock().release();
• D. rwlock.getLock().lock(); rwlock.getLock().Unlock();
• E. rwlock.readLock().lock(); rwlock.readLock().unlock();
• F. rwlock.WriteLock().acquire(); rwlock.writeLock().release();

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

• A. SQL-92
• B. SQL 99
• C. JDBC 4.0
• D. SQL-2003

public static void main(String[] args) {
Path tempFile = null;
try {
Path p = Paths.get("emp");
tempFile = Files.createTempFile(p, "report", ".tmp");
try (BufferedWriter writer = Files.newBufferedWriter(tempFile, Charset.forName("UTF8")))){
writer.write("Java SE 7");
}
System.out.println("Temporary file write done");
} catch(IOException e) {
System.err.println("Caught IOException: " + e.getMessage());
}
}

• A. Option B
• B. Option C
• C. Option A
• D. Option D