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[Hardware] Realistic Oracle Reliable 1z1-809 Test Vce Quiz

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【Hardware】 Realistic Oracle Reliable 1z1-809 Test Vce Quiz

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Oracle Java SE 8 Programmer II Sample Questions (Q181-Q186):NEW QUESTION # 181
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 () <= 60) {
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 ();
t.doRegister("Mathew", 60);
}
}
What is the result?
  • A. A UserException is thrown.
  • B. An AgeOutOfLimitException is thrown.
  • C. A compilation error occurs in the main method.
  • D. User is registered.
Answer: A

NEW QUESTION # 182
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 throws an IOException.
  • B. The method deletes all the .class files in the Projects directory and its subdirectories.
  • C. The method executes and does not make any changes to the Projects directory.
  • D. The method deletes the .class files of the Projects directory only.
Answer: B

NEW QUESTION # 183
Given the code fragments:
public class Book implements Comparator<Book> {
String name;
double price;
public Book () {}
public Book(String name, double price)   {
this.name = name;
this.price = price;
}
public int compare(Book b1, Book b2)   {
return b1.name.compareTo(b2.name);
}
public String toString() {
return name + ":" + price;
}
}
and
List<Book>books = Arrays.asList (new Book ("Beginning with Java", 2), new book
( "A
Guide to Java Tour", 3));
Collections.sort(books, new Book());
System.out.print(books);
What is the result?
  • A. [Beginning with Java:2, A Guide to Java Tour:3]
  • B. An Exceptionis thrown at run time.
  • C. A compilation error occurs because the Book class does not override the abstract method compareTo
    ().
  • D. [A Guide to Java Tour:3.0, Beginning with Java:2.0]
Answer: D

NEW QUESTION # 184
Given:
interface Doable {
public void doSomething (String s);
}
Which two class definitions compile? (Choose two.)
public abstract class Task implements Doable {
  • A. public void doSomething(Integer i)   { }
    public String doThis(Integer j)   { }
    }
    public class Do implements Doable {
  • B. public void doSomething(Integer i)   { }
    }
    public class Action implements Doable {
  • C. public void doSomething(Integer i)   { }
    public void doSomething(String s)   { }
    public void doThat (String s)   { }
    }
  • D. public void doSomethingElse(String s)   { }
    }
    public abstract class Work implements Doable {
  • E. public abstract void doSomething(String s)   { }
    public void doYourThing(Boolean b)   { }
    }
    public class Job implements Doable {
Answer: C,D
Explanation:
Explanation/Reference:

NEW QUESTION # 185
Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap<> ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@ Override public int compare (Integer o1, Integer o2) {return o2.compareTo (o1); } } ); treeMap.putAll (unsortMap); for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) { System.out.print (entry.getValue () + " ");
}
}
}
What is the result?
  • A. d b e z j
  • B. z b d e j
  • C. A compilation error occurs.
  • D. j z e b d
Answer: D

NEW QUESTION # 186
......
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