Multiple choice technology programming languages

Three of the methods are incorrectly declared, which are they? 

public abstract class Tester {
    public void test1();
    public final void test2() {};
    public static void test3() {};
    public abstract static void test4();
    public abstract final void test5();
}

  1. test1, test2 and test4

  2. test2, test4 and test5

  3. test1, test4 and test5

  4. test1, test2 and test3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

test1 fails: abstract methods can't have bodies in abstract classes. test4 fails: abstract methods can't be static. test5 fails: abstract methods can't be final. test2 and test3 are valid: abstract classes can have final and static methods with implementations. Option C correctly identifies the three invalid declarations.

Keep practicing — related questions