Definite and Indefinite Article

Question 1

what is nominative used for?

Answer 1

subject

Question 2

what is accusative used for?

Answer 2

object

Question 3

definite table?

Answer 3

n= der, die, das, die
a= den, die, das, die

Question 4

indefinite table?

Answer 4

n=ein, eine, ein, eine
a= einen, eine, ein, eine