The matrix `A=[0 0 4 0 4 0 4 0 0]` is a (a) square matrix (b) diagonal matrix (c) unit matrix (d) none of these

The matrix A=[004040400] is a (a) square matrix (b) diagonal matrix (c) unit matrix (d) none of these

The matrix A = [(1, 2),( 0,1)] is (a) a Unit matrix (b) a diagonal matrix (c) a scalar matrix (d) None of these

The matrix A = [(1, 2),( 0,1)] is (a) a Unit matrix (b) a diagonal matrix (c) a scalar matrix (d) None of these

The matrix A=[{:(0,0,2),(0,2,0),(2,0,0):}] is: a) scalar matrix b) diagonal matrix c) square matrix d) none of these

The matrix A=[-5-8 0 3 5 0 1 2-] is a. idempotent matrix b. involutory matrix c. nilpotent matrix d. none of these

If A is a square matrix, then A A is a (a) skew-symmetric matrix (b) symmetric matrix (c) diagonal matrix (d) none of these

If A is a square matrix,then AA is a (a) skew- symmetric matrix (b) symmetric matrix (c) diagonal matrix (d) none of these

The matrix A=[0-5 8 5 0 12-8-12 0] is a (a) diagonal matrix (b) symmetric matrix (c) skew-symmetric matrix (d) scalar matrix

The matrix P = [(0,0,4),(0,4,0),(4,0,0)] is a