Pass the Oracle Java SE 1z0-809 Questions and answers with CertsForce

Given the content of /resourses/Message.properties:

welcome1=”Good day!”

and given the code fragment:

Properties prop = new Properties ();

FileInputStream fis = new FileInputStream (“/resources/Message.properties”);

prop.load(fis);

System.out.println(prop.getProperty(“welcome1”));

System.out.println(prop.getProperty(“welcome2”, “Test”));//line n1

System.out.println(prop.getProperty(“welcome3”));

What is the result?

Which class definition compiles?

Given the code fragment:

List str = Arrays.asList (“my”, “pen”, “is”, “your’, “pen”);

Predicate test = s -> {

int i = 0;

boolean result = s.contains (“pen”);

System.out.print(i++) + “:”);

return result;

};

str.stream()

.filter(test)

.findFirst()

.ifPresent(System.out ::print);

What is the result?

Given:

What is the result?

Given:

and the code fragment:

What is the result?

Given the code fragment:

What is the result?

Given:

and

Which interface from the java.util.function package should you use to refactor the class Txt?

Given the code fragment:

List listVal = Arrays.asList(“Joe”, “Paul”, “Alice”, “Tom”);

System.out.println (

// line n1

);

Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?

Given the code fragment:

public static void main (String [ ] args) throws IOException {

BufferedReader br = new BufferedReader (new InputStremReader (System.in));

System.out.print (“Enter GDP: “);

//line 1

}

Which code fragment, when inserted at line 1, enables the code to read the GDP from the user?

Which two statements are true about synchronization and locks? (Choose two.)