# Matrices and Determinants – Exercise – 1

» Exercise – 1

1. A square matrix all of whose elements except the main diagonal are zeros is called a : (a) null matrix (b) singular matrix (c) diagonal matrix (d) symmetric matrix

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2. Square matrix A for which AT = -A is called a : (a) row matrix (b) column matrix (c) symmetric matrix (d) skew-symmetric matrix

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3. Square matrix A for which AT = A is called a : (a) row matrix (b) column matrix (c) symmetric matrix (d) skew-symmetric matrix

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4. A square matrix A with complex entries for which (A)T = –A is called : (a) identity matrix (b) hermitian matrix (c) symmetric matrix (d) skew-hermitian matrix

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5. This matrix is a _______ .  (a) null matrix (b) row matrix (c) square matrix (d) symmetric matrix