Online Access Free 1z0-809 Practice Test

Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + ":" + name + ":" + city;
}
public String getCourse() {return course;}
public String getName() {return name;}
public String getCity() {return city;}
and the code fragment:
List<Student> stds = Arrays.asList(
new Student ("Jessy", "Java ME", "Chicago"),
new Student ("Helen", "Java EE", "Houston"),
new Student ("Mark", "Java ME", "Chicago"));
stds.stream()
.collect(Collectors.groupingBy(Student::getCourse))
.forEach(src, res) -> System.out.println(res));
What is the result?

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

Which statement is true about the single abstract method of the java.util.function.Function interface?

• A.It accepts an argument and produces a result of any data type.
• B.It accepts one argument and always produces a result of the same type as the argument.
• C.It accepts one argument and returns void.
• D.It accepts one argument and returns boolean.

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

Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print /First.txt?

• A.Path iP = Paths.toPath ("/First.txt");
• B.Path iP = new Path ("/First.txt");
• C.Path iP = new Paths ("/First.txt");
• D.Path iP = Paths.get ("/", "First.txt");

Given:

What is the result?

• A.The program prints nothing.
• B.A compile-time error occurs.
• C.MyException is thrown.
• D.Exception is thrown.