PROBLEM SOLVING USING R - UNIT II - TEST 2 - MCQS

How can you create a multidimensional array in R?

• array()

• matrix()

• list()

• data.frame()

How can you extract a subset of elements from a multidimensional array in R?

• array_subset()

• subset()

• extract()

• []

How can you replace specific elements in a matrix with new values in R?

• replace()

• modify()

• assign()

• []

What does the function rowMeans() do in R?

• Calculates the mean of each row in a matrix

• Calculates the mean of each column in a matrix

• Calculates the sum of each row in a matrix

• Calculates the sum of each column in a matrix

How can you calculate the determinant of a matrix in R?

• determinant()

• det()

• matrix_det()

• diag()

How can you calculate the inverse of a matrix in R?

• inverse()

• inv()

• matrix_inv()

• solve()

How can you calculate the element-wise product of two matrices in R?

• element_product()

• mult()

• matrix_mult()

• *

What does the function array() do in R?

• Creates a matrix with predefined values

• Creates a vector with predefined values

• Creates a multidimensional array with predefined values

• Creates a list with predefined values

How can you extract a specific slice from a multidimensional array in R?

• array_slice()

• slice()

• extract_slice()

• []

How can you replace specific elements in a multidimensional array with new values in R?

• replace()

• modify()

• assign()

• []