Need help with these Java True or False questions, will thumbs up.

1. Array length method returns the number of elements in the Array.

a, True

b. False

2. Open closed principle says that: "Objects in a program should be replaced with instances of their subtypes without altering the correctness of that program"

a. True

b. False

3. The interpreter converts the source code line-by-line during RUN Time.

a. True

b. False

4. The keyword static allows main() to be called without having to instantiate a particular instance of the class.

a. True

b. False

5. Consider following code:

class Test{

public static void main(String[] args) {

short s = 10; // 1

char c = s; // 2

s = c; // 3

}

}

Both lines 2 and 3 are valid?

a. True

b. False

6. To create a GUI using JavaFX, "JavaFX" class must be extended?

a. True

b. False