Question 1

What function is used in R to read a CSV file into a data frame?

Accepted Answer

read.csv

Answer

open.csv

Answer

load.csv

Answer

import.csv

Question 2

Which operator is used in R for element-wise multiplication of two vectors?

Accepted Answer

*

Answer

//

Answer

%

Answer

&

Question 3

What function is used in R to generate a sequence of numbers?

Accepted Answer

seq()

Answer

list()

Answer

range()

Answer

vector()

Question 4

Which function is used to calculate the mean of a numeric vector in R?

Accepted Answer

mean()

Answer

average()

Answer

median()

Answer

total()

Question 5

What function is used to combine vectors or data frames by rows in R?

Accepted Answer

rbind()

Answer

append()

Answer

merge()

Answer

cbind()

Question 6

In R, which function is used to display the structure of an R object?

Accepted Answer

str()

Answer

dim()

Answer

summary()

Answer

length()

Question 7

What is the default data type of the variable created by the command x <- c(1, 2, 3)?

Accepted Answer

numeric

Answer

factor

Answer

logical

Answer

character

Question 8

Which function in R is used to install packages from CRAN?

Accepted Answer

install.packages()

Answer

load.packages()

Answer

add.packages()

Answer

package.install()

Question 9

In R, which function is used to plot data in a basic scatter plot?

Accepted Answer

plot()

Answer

scatter()

Answer

graph()

Answer

chart()

Question 10

What is the purpose of the 'if' statement in R?

Accepted Answer

Conditional execution of code blocks

Answer

Defining a function

Answer

Looping through items

Answer

Creating a vector

Question 11

Which function in R is used to create a sequence of numbers?

Accepted Answer

seq()

Answer

range()

Answer

data.frame()

Answer

list()

Question 12

What does the function str() do in R?

Accepted Answer

It displays the structure of an R object.

Answer

It summarizes a dataset.

Answer

It installs a package.

Answer

It plots a graph.

Question 13

In R, which operator is used for element-wise addition of two vectors?

Accepted Answer

+

Answer

/

Answer

-

Answer

*

Question 14

Which function is used to read a CSV file into R?

Accepted Answer

read.csv()

Answer

open.csv()

Answer

import.csv()

Answer

load.csv()

Question 15

What is the purpose of the summary() function in R?

Accepted Answer

To provide a summary of a dataset's statistics.

Answer

To create a plot

Answer

To install packages

Answer

To filter data

Question 16

What is the primary purpose of the ggplot2 package in R?

Accepted Answer

To create advanced visualizations and graphics.

Answer

To perform statistical analysis

Answer

To write functions

Answer

To manipulate data

Question 17

Which function is used to check the structure of a data frame in R?

Accepted Answer

str()

Answer

head()

Answer

colnames()

Answer

dim()

Question 18

Which function in R is used to create a plot of data?

Accepted Answer

plot()

Answer

visualize()

Answer

display()

Answer

graph()

Question 19

What does the function NA represent in R?

Accepted Answer

Missing values in data.

Answer

Non-Applicable data

Answer

Negative numbers

Answer

Numeric Average

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