1. If m=1,how is the 2d array A called?

    Liniar 2d array
    Columnar 2d array
    Null 2d array

2. If n=1,how is the 2d array A called?

    Columnar 2d array
    Null 2d array
    Liniar 2d array

3. In what circumstances does the AB product makes sense?

    The number of lines of the 2d array A is equal with the number of columns of the 2d array B
    A and B are square 2d arrays
    The number of columns of the 2d array A is equal with the number of lines of the 2d array B

4. What is the neutral element when multiplying with 2d arrays?

    Square 2d arrays
    Null 2d array
    Unit 2d array