PROBLEM SOLVING USING R - UNIT II - TEST 1 - MCQS

PROBLEM SOLVING USING R - UNIT II - TEST 1 - MCQS

University

15 Qs

quiz-placeholder

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PROBLEM SOLVING USING R - UNIT II - TEST 1 - MCQS

PROBLEM SOLVING USING R - UNIT II - TEST 1 - MCQS

Assessment

Quiz

Computers

University

Practice Problem

Medium

Created by

MS.SHYAMALADEVI C

Used 4+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a matrix in R?

A one-dimensional array

A two-dimensional array

A collection of data frames

A statistical model

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you define a matrix in R using the matrix() function?

matrix(data)

matrix(data, nrow)

matrix(data, ncol)

matrix(data, nrow, ncol)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which argument in the matrix() function determines the direction of filling the elements?

byrow

bycolumn

fill

direction

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you bind two matrices by rows in R?

bind_rows()

rbind()

row_bind()

merge()

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the dim() function return in R?

Number of rows in a matrix

Number of columns in a matrix

Dimensions of a matrix

Data type of a matrix

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you subset a specific row in a matrix in R?

matrix[row, ]

matrix[, row]

matrix[row]

matrix[row, col]

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you extract a specific column from a matrix in R?

matrix[row, ]

matrix[, col]

matrix[col]

matrix[row, col]

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