Tested 1Z0-809 Dumps Questions 2021

NEW QUESTION 1
Which statement is true about java.util.stream.Stream?

• A. A stream cannot be consumed more than once.
• B. The execution mode of streams can be changed during processing.
• C. Streams are intended to modify the source data.
• D. A parallel stream is always faster than an equivalent sequential stream.

Answer: B

NEW QUESTION 2
Given:

What is the result?

• A. –catch--finally--dostuff-
• B. –catch-
• C. –finally--catch-
• D. –finally-dostuff--catch-

Answer: C

NEW QUESTION 3
Given the code fragment:
List<String> str = Arrays.asList (“my”, “pen”, “is”, “your’, “pen”); Predicate<String> test = s -> {
int i = 0;
boolean result = s.contains (“pen”);
System.out.print(i++) + “:”); return result;
};
str.stream()
.filter(test)
.findFirst()
.i fPresent(System.out ::print); What is the result?

• A. 0 : 0 : pen
• B. 0 : 1 : pen
• C. 0 : 0 : 0 : 0 : 0 : pen
• D. 0 : 1 : 2 : 3 : 4 :
• E. A compilation error occurs.

Answer: A

NEW QUESTION 4
The data.doc, data.txt and data.xml files are accessible and contain text. Given the code fragment:
Stream<Path> paths = Stream.of (Paths. get(“data.doc”),
Paths. get(“data.txt”),
Paths. get(“data.xml”));
paths.filter(s-> s.toString().endWith(“txt”)).forEach( s -> {
try { Files.readAllLines(s)
.stream()
.f orEach(System.out::println); //line n1
} catch (IOException e) { System.out.println(“Exception”);
}
}
);
What is the result?

• A. The program prints the content of data.txt file.
• B. The program prints: Exception<<The content of the data.txt file>> Exception
• C. A compilation error occurs at line n1.
• D. The program prints the content of the three files.

Answer: A

NEW QUESTION 5
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 The Employee table has a column ID of type integer and the SQL query matches one record. What is the result?

• A. Compilation fails at line 14.
• B. Compilation fails at line 15.
• C. The code prints the employee ID.
• D. The code prints Error.

Answer: A

NEW QUESTION 6
Which two statements are true about the Fork/Join Framework? (Choose two.)

• A. The RecursiveTask subclass is used when a task does not need to return a result.
• B. The Fork/Join framework can help you take advantage of multicore hardware.
• C. The Fork/Join framework implements a work-stealing algorithm.
• D. The Fork/Join solution when run on multicore hardware always performs faster than standard sequential solution.

Answer: AC

NEW QUESTION 7
Given: Book.java:
public class Book {
private String read(String bname) { return “Read” + bname }
}
EBook.java:
public class EBook extends Book {
public class String read (String url) { return “View” + url }
}
Test.java:
public class Test {
public static void main (String[] args) { Book b1 = new Book();
b1.read(“Java Programing”); Book b2 = new EBook();
b2.read(“http://ebook.com/ebook”);
}
}
What is the result?

• A. Read Java Programming View http:/ ebook.com/ebook
• B. Read Java Programming Read http:/ ebook.com/ebook
• C. The EBook.java file fails to compile.
• D. The Test.java file fails to compile.

Answer: D

NEW QUESTION 8
Given the code fragment:
Path file = Paths.get (“courses.txt”);
// line n1
Assume the courses.txt is accessible.
Which code fragment can be inserted at line n1 to enable the code to print the content of the courses.txt file?

• A. List<String> fc = Files.list(file); fc.stream().forEach (s - > System.out.println(s));
• B. Stream<String> fc = Files.readAllLines (file); fc.forEach (s - > System.out.println(s));
• C. List<String> fc = readAllLines(file); fc.stream().forEach (s - > System.out.println(s));
• D. Stream<String> fc = Files.lines (file); fc.forEach (s - > System.out.println(s));

Answer: D

NEW QUESTION 9
Given:

and the code fragment:

What is the result?

• A. A compilation error occurs at line n2.
• B. A compilation error occurs because the try block doesn’t have a catch or finally block.
• C. A compilation error occurs at line n1.
• D. The program compiles successfully.

Answer: B

NEW QUESTION 10
Given the code fragment:

What is the result?

• A. 5 : 3 : 6
• B. 6 : 5 : 6
• C. 3 : 3 : 4
• D. 4 : 4 : 4

Answer: D

NEW QUESTION 11
Given:

and the code fragment:

What is the result?

• A. [Java EE: Helen:Houston][Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
• B. Java EEJava ME
• C. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago] [Java EE: Helen:Houston]
• D. A compilation error occurs.

Answer: D

NEW QUESTION 12
Given that data.txt and alldata.txt are accessible, and the code fragment:

What is required at line n1 to enable the code to overwrite alldata.txt with data.txt?

• A. br.close();
• B. bw.writeln();
• C. br.flush();
• D. bw.flush();

Answer: D

NEW QUESTION 13
Given the content:

and the code fragment:

What is the result?

• A. username = Entrez le nom d’utilisateur password = Entrez le mot de passe
• B. username = Enter User Name password = Enter Password
• C. A compilation error occurs.
• D. The program prints nothing.

Answer: A

NEW QUESTION 14
What is the result?

• A. A compilation error occurs at line 7.
• B. 100
• C. A compilation error occurs at line 8.
• D. A compilation error occurs at line 15.

Answer: A

NEW QUESTION 15
For which three objects must a vendor provide implementations in its JDBC driver? (Choose three.)

• A. Time
• B. Date
• C. Statement
• D. ResultSet
• E. Connection
• F. SQLException
• G. DriverManager

Answer: CDE

Explanation: Database vendors support JDBC through the JDBC driver interface or through the ODBC connection. Each driver must provide implementations of java.sql.Connection, java.sql.Statement, java.sql.PreparedStatement, java.sql.CallableStatement, and java.sql.Re sultSet. They must also implement the java.sql.Driver interface for use by the generic java.sql.DriverManager interface.

NEW QUESTION 16
You have been asked to create a ResourceBundle which uses a properties file to localize an application. Which code example specifies valid keys of menu1 and menu2 with values of File Menu and View Menu?

• A. <key name = ‘menu1”>File Menu</key><key name = ‘menu2”>View Menu</key>
• B. <key>menu1</key><value>File Menu</value><key>menu2</key><value>View Menu</value>
• C. menu1, File Menu, menu2, View Menu Menu
• D. menu1 = File Menu menu2 = View Menu

Answer: D