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Obtaining the Oracle 1z0-809 certification can be a valuable asset for Java developers looking to advance their careers. It demonstrates their proficiency in advanced Java programming concepts and sets them apart from other candidates in a highly competitive job market.
Oracle 1z1-809 certification exam has a duration of 150 minutes and consists of 85 multiple-choice questions. 1z0-809 exam covers a wide range of topics, including Java Class Design, Advanced Java Class Design, Generics and Collections, Lambda Built-in Functional Interfaces, Java Stream API, Exceptions and Assertions, Java I/O Fundamentals, Java File I/O, Java Concurrency, Building Database Applications with JDBC, Localization, and Annotations.
To take the Oracle 1z0-809 Certification Exam, candidates must have a good understanding of the Java programming language, including its syntax, operators, and data types. They should also be familiar with object-oriented programming concepts and design patterns. Additionally, candidates should have experience in developing Java applications and be comfortable with using various Java frameworks.
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Oracle Java SE 8 Programmer II Sample Questions (Q198-Q203):
NEW QUESTION # 198
In 2015, daylight saving time in New York, USA, begins on March 8th at 2:00 AM. As a result, 2:00 AM becomes 3:00 AM.
Given the code fragment:
Which is the result?
- A. 2:00 - difference: 1
- B. 4:00 - difference: 3
- C. 3:00 - difference: 2
- D. 4:00 - difference: 2
Answer: A
NEW QUESTION # 199
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<Product> products = new ArrayList <> (Arrays.asList(new Product(1, 10), new Product (2, 30), new Product (3, 20)); 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. 4:0
- B. 2:30
- C. 4:60
- D. 4:602:303:201:10
- E. The program prints nothing
Answer: D
NEW QUESTION # 200
Given the code fragment:
public class FileThread implements Runnable {
String fName;
public FileThread(String fName) { this.fName = fName; }
public void run () System.out.println(fName);}
public static void main (String[] args) throws IOException,
InterruptedException {
ExecutorService executor = Executors.newCachedThreadPool();
Stream<Path> listOfFiles = Files.walk(Paths.get("Java Projects"));
listOfFiles.forEach(line -> {
executor.execute(new FileThread(line.getFileName().toString
())); //
line n1
});
executor.shutdown();
executor.awaitTermination(5, TimeUnit.DAYS); //
line n2
}
}
The Java Projects directory exists and contains a list of files.
What is the result?
- A. The program prints files names sequentially.
- B. The program throws a runtime exception at line n2.
- C. A compilation error occurs at line n1.
- D. The program prints files names concurrently.
Answer: D
NEW QUESTION # 201
Given the code fragment:
What is the result?
- A. Logged out at: 2015-01-12T21:58:19.880Z
- B. Logged out at: 2015-01-12T21:58:00Z
- C. A compilation error occurs at line n1.
- D. Can't logout
Answer: B
NEW QUESTION # 202
Which two code blocks correctly initialize a Locale variable? (Choose two.)
- A. Locale loc4 = Locale.UK;
- B. Locale loc1 = "UK";
- C. Locale loc3 = Locale.getLocaleFactory("RU");
- D. Locale loc2 = Locale.getInstance("ru");
- E. Locale loc5 = new Locale ("ru", "RU");
Answer: A,E
NEW QUESTION # 203
......
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