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R quiz

Authored by Vignesh Raja

Professional Development

Professional Development

Used 1+ times

R quiz
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31 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a valid way to create a numeric vector in R?

c(1, 2, 3)

c[1,2,3]

vector[1, 2, 3]

vector(1,2,3)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the data type of the result of the following expression?

typeof(3L)

"double"

"integer"

"numeric"

"logical"

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What will be the output of this code?

x <- c(TRUE, FALSE, TRUE)

sum(x)

3

2

1

Error

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which function is used to check the structure of an R object?

summary()

structure()

class()

str()

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Write R code to assign the value 5 to a variable named

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which function is used to create a bar plot in R?

barplot()

barchart()

bar()

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of mean(c(2, 4, 6, NA), na.rm = TRUE)?

4

NA

3

Error

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