MODULE 4 - MATRICES

1. Which of the following is a rectangular arrangement of numbers in rows and columns?

• •  Set

• • Matrix

•  Determinant

• • Vector

1. A matrix is called square if:

• • Number of rows = number of columns

• Number of rows ≠ number of columns

• • All elements are equal

• •  It is symmetric

1. A diagonal matrix is a square matrix where:

• • All elements are non-zero

• Only diagonal elements are non-zero

• •  All elements are zero

• • All diagonal elements are equal

1. Which of the following matrices has equal elements across its diagonal?

• •  Identity matrix

• •  Diagonal matrix

• • Symmetric matrix

• •  Row matrix

1. A matrix is called symmetric if:

• • Aᵀ = -A

• • Aᵀ = A

• •  Aᵀ ≠ A

• •  Aᵀ = 0

1. A matrix is skew-symmetric if:

• • Aᵀ = -A

• •  Aᵀ = A

• •  Aᵀ ≠ A

• •  Aᵀ = 0

1. In a diagonal matrix, non-diagonal elements are:

• • All zero

• • All one

• • All non-zero

• • All equal

1. If a matrix is both symmetric and skew-symmetric, it must be:

• • A diagonal matrix

• • A zero matrix

• • A unit matrix

• • A row matrix

1. Which of the following is not a type of matrix?

• • Column matrix

• • Square matrix

• •  Random matrix

• • Null matrix

1. A row matrix is a matrix with:

• • One row

• • One column

• • Same number of rows and columns

• • One non-zero element