Exam 1z0-809 topic 1 question 25 discussion

It will print 3

The answer is : 3

B is the correct answer. import java.util.Arrays; import java.util.List; import java.util.function.Predicate; interface CourseFilter extends Predicate<String> { public default boolean test(String str) { return str.equals("Java"); } } public class Main { public static void main(String[] args) { List<String> strs = Arrays.asList("Java", "Java EE", "Java ME"); Predicate<String> cf1 = s -> s.length() > 3; Predicate cf2 = new CourseFilter() { // line n1 public boolean test(String s) { return s.contains("Java"); } }; long c = strs.stream() .filter(cf1) .filter(cf2) // line n2 .count(); System.out.println(c); } }

After fixing typos answer is B.

Compilation error occurs at line n2 as it's obviously missing parenthesis ')' so the actual answer is D. If it had compiled then the outpub would be 3 and the answer - C.

C what about C can we create an instance of an Interface

Answer is 3.........

output 3 is correct, tested