2021 Realistic 1z0-809 Dumps Latest Oracle Practice Tests Dumps

1z0-809 Dumps PDF - 1z0-809 Real Exam Questions Answers

NEW QUESTION 32
Given the code fragment:

Which code fragment prints red: blue: sma11: medium: ?

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

Answer: D

 

NEW QUESTION 33
Given the code fragment:
List<Integer> codes = Arrays.asList (10, 20);
UnaryOperator<Double> uo = s -> s +10.0;
codes.replaceAll(uo);
codes.forEach(c -> System.out.println(c));
What is the result?

• A. A compilation error occurs.
• B. 10
  20
• C. 20.0
  30.0
• D. A NumberFormatExceptionis thrown at run time.

Answer: A

 

NEW QUESTION 34
Given the code snippet from a compiled Java source file:

Which command-line arguments should you pass to the program to obtain the following output?
Arg is 2

• A. java MyFile 0 1 2 3
• B. java MyFile 2 1 2
• C. java MyFile 1 2 2 3 4
• D. java MyFile 1 3 2 2

Answer: D

 

NEW QUESTION 35
Given:
Item table
* ID, INTEGER: PK
* DESCRIP, VARCHAR(100)
* PRICE, REAL
* QUANTITY< INTEGER
And given the code fragment:
9. try {
10. Connection conn = DriveManager.getConnection(dbURL, username, password);
11. String query = "Select * FROM Item WHERE ID = 110";
12. Statement stmt = conn.createStatement();
13. ResultSet rs = stmt.executeQuery(query);
14. while(rs.next()) {
15. System.out.println("ID: " + rs.getInt("Id"));
16. System.out.println("Description: " + rs.getString("Descrip"));
17. System.out.println("Price: " + rs.getDouble("Price"));
18. System.out.println(Quantity: " + rs.getInt("Quantity"));
19. }
20. } catch (SQLException se) {
21. System.out.println("Error");
22. }
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists.
The SQL query is valid.
What is the result?

• A. An exception is thrown at runtime.
• B. Compilation fails.
• C. The code prints information about Item 110.
• D. The code prints Error.

Answer: C

 

NEW QUESTION 36
Given:

and the code fragment:

What is the result?

• A. false
  false
• B. false
  true
• C. true
  true
• D. true
  false

Answer: D

 

NEW QUESTION 37
Given the code fragment:
ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 3, 0, 0, 0, ZoneID.of("UTC-7")); ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of("UTC-5")); long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1 System.out.println("Travel time is" + hrs + "hours"); What is the result?

• A. Travel time is 4 hours
• B. Travel time is 6 hours
• C. Travel time is 8 hours
• D. An exception is thrown at line n1.

Answer: A

 

NEW QUESTION 38
Given:
class Bird {
public void fly () { System.out.print("Can fly"); }
}
class Penguin extends Bird {
public void fly () { System.out.print("Cannot fly"); }
}
and the code fragment:
class Birdie {
public static void main (String [ ] args) {
fly( ( ) -> new Bird ( ));
fly (Penguin : : new);
}
/* line n1 */
}
Which code fragment, when inserted at line n1, enables the Birdie class to compile?

• A. static void fly (Consumer<? extends Bird> bird) { bird.accept( ) fly ();
  }
• B. static void fly (Supplier<? extends Bird> bird) { LOST
• C. static void fly (Supplier<Bird> bird) {
  bird.get( ) fly ();
  }
• D. static void fly (Consumer<Bird> bird) {
  bird :: fly ();
  }

Answer: C

Explanation:
Very confusing question. There is no logic in the options.

 

NEW QUESTION 39
Given:

Which option fails?

• A. Foo<String, String> grade = new Foo <> ("John", "A");
• B. Foo<Object, Object> percentage = new Foo<String, Integer>("Steve", 100);
• C. Foo<String, String> pair = Foo.<String>twice ("Hello World!");
• D. Foo<String, Integer> mark = new Foo<String, Integer> ("Steve", 100);

Answer: D

 

NEW QUESTION 40
Given the code fragment:

Which is the valid definition of the Course enum?

• A.
• B.
• C.
• D.

Answer: D

 

NEW QUESTION 41
Given the code fragments:

and

What is the result?

• A. France
  Optional[NotFound]
• B. Optional [France]
  Optional [NotFound]
• C. France
  Not Found
• D. Optional[France]
  Not Found

Answer: C

 

NEW QUESTION 42
Given the code fragments:

and

What is the result?

• A. Optional[France]Not Found
• B. FranceNot Found
• C. Optional [France]Optional [NotFound]
• D. FranceOptional[NotFound]

Answer: B

 

NEW QUESTION 43
Assume customers.txt is accessible and contains multiple lines.
Which code fragment prints the contents of the customers.txt file?

• A. Stream<Path> stream = Files.find (Paths.get ("customers.txt"));stream.forEach( c) ->
  System.out.println(c));
• B. Stream<String> stream = Files.find (Paths.get ("customers.txt"));stream.forEach((String c) ->
  System.out.println(c));
• C. Stream<Path> stream = Files.list (Paths.get ("customers.txt"));stream.forEach( c) ->
  System.out.println(c));
• D. Stream<String> lines = Files.lines (Paths.get ("customers.txt"));lines.forEach( c) ->
  System.out.println(c));

Answer: D

 

NEW QUESTION 44
Given the code fragments:
class ThreadRunner implements Runnable {
public void run () { System.out.print ("Runnable") ; }
}
class ThreadCaller implements Callable {
Public String call () throws Exception {return "Callable"; )
}
and
ExecutorService es = Executors.newCachedThreadPool ();
Runnable r1 = new ThreadRunner ();
Callable c1 = new ThreadCaller ();
// line n1
es.shutdown();
Which code fragment can be inserted at line n1 to start r1 and c1 threads?

• A. es.execute (r1);Future<String> f1 = es.execute (c1) ;
• B. es.submit(r1);Future<String> f1 = es.submit (c1);
• C. Future<String> f1 = (Future<String>) es.submit (r1);es.execute (c1);
• D. Future<String> f1 = (Future<String>) es.execute(r1);Future<String> f2 = (Future<String>)
  es.execute(c1);

Answer: B

 

NEW QUESTION 45
Given the code fragment:
List<String> colors = Arrays.asList("red", "green", "yellow");
Predicate<String> test = n - > {
System.out.println("Searching...");
return n.contains("red");
};
colors.stream()
.filter(c -> c.length() > 3)
.allMatch(test);
What is the result?

• A. A compilation error occurs.
• B. Searching...
• C. Searching... Searching... Searching...
• D. Searching... Searching...

Answer: A

 

NEW QUESTION 46
Given the code fragment:
LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);
LocalDate next15days = valentinesDay.plusDays (15);
LocalDate nextYear = next15days.plusYears(1); // line n1
System.out.println(nextYear);
What is the result?

• A. 2016-03-01
• B. A compilation error occurs at line n1.
• C. 2016-02-29
• D. A DateTimeException is thrown.

Answer: B

 

NEW QUESTION 47
Given:
public class product {
int id; int price;
public Product (int id, int price) {
this.id = id;
this.price = price;
}
public String toString() { return id + ":" + price; }
}
and the code fragment:
List products = new ArrayList(Arrays.asList(new Product(1, 10),
new Product (2, 30),
new Product (2, 30));
Product p = products.stream().reduce(new Product (4, 0), (p1, p2) ->
{ p1.price+=p2.price;
return new Product (p1.id, p1.price);});
products.add(p);
products.stream().parallel()
.reduce((p1, p2) - > p1.price > p2.price ? p1 : p2)
.ifPresent(System.out: :println);
What is the result?

• A. 2 : 30
• B. The program prints nothing.
• C. 4 : 60
  2 : 30
  3 : 20
  1 : 10
• D. 4 : 0
• E. 4 : 60

Answer: E

 

NEW QUESTION 48
......

Given that this exam is at the professional level of certification, candidates have a large amount of work to do. Therefore, the first thing that is recommended is to thoroughly review the complete list of topics available on the official exam page, which includes:

• Generics and Collections. This allows the candidate to create and use a generic class as well as ArrayList, TreeSet, TreeMap, and ArrayDeque objects.
• Localization. In particular how to read and set the locale by using the Locale object, to create and read a Properties file, and to build a recourse bundle for each locale.
• Java Concurrency. The candidates must be able to create worker threads, as well as to use parallel Fork/Join Framework and parallel Streams.
• Exceptions and Assertions. In other words, how to use try-catch and throw statements, alongside creating custom exceptions and Auto-closeable resources.
• NIO.2, Path Interface, and Files Class.
• Advanced Class Design. Specifically, candidates must demonstrate skills in how to implement encapsulation, polymorphism, and inheritance.
• Stream API. It means the code development that uses optional class, Stream data, and calculation methods in addition to sorting a collection using Stream API.
• I/O Fundamentals. It means the skill of reading and writing data from the console.

To apply for this Oracle certification test, you should first pay $245 for a voucher. After that, go to Pearson VUE and log into your account. Enter the exam code, which should be 1Z0-809, and follow the instructions that will pop up.

The Oracle 1Z0-809 exam is intended for those individuals who want to get the Oracle Certified Professional, Java SE 8 Programmer certification. The potential candidates for this test are those IT specialists who have some years of experience with Java SE 8 platform and hold the Oracle Certified Associate, Java SE 8 Programmer credential.

The Oracle 1Z0-809 is a 150-minute test with 85 questions, that are mainly of a multiple-choice format, but there may also be other types, such as drag and drop, simulations, or scenario-based. This certification exam is available in the English language and the passing score for it is 65%. However, you need to try to get more than that.

 

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1z0-809 Exam [2021] Dumps Oracle PDF Questions: https://drive.google.com/open?id=1hzY38E5nI2U3co7TCH5BmtvzjXMzP-iO