Which package is commonly used for data visualization in R?
Plyr
Dplyr
Ggplot2
Tidyr
How do you access the third element of a vector named my_vector in R?
My_vector[3]
My_vector(3)
My_vector{3}
My_vector.3
Which operator is used for exact matching in R?
=
==
%in%
>
What does the mean() function in R do?
Calculate the mode of a vector
Calculate the standard deviation of a vector
Calculate the arithmetic mean of a vector
Calculate the median of a vector
Which function is used to read data from a CSV file in R?
Read.csv()
Read.table()
Read.xlsx()
Load()
What does the NA value represent in R?
Not available or missing data
Numeric average
No answer
Not applicable
Which function is used to generate random numbers in R?
Random()
Randint()
Runif()
Rnorm()
How do you comment a single line of code in R?
/* comment */
#comment
//comment
Which package provides the lm() function for linear regression in R?
Ggplot2
Dplyr
Stats
Base
Which data structure in R is a collection of key-value pairs?
Vector
List
Data frame
Matrix
Which function is used to calculate the standard deviation of a vector in R?
Sd()
Var()
Mean()
Median()
How do you remove duplicate rows from a data frame in R?
Unique(df)
Distinct(df)
Remove_duplicates(df)
Drop_duplicates(df)
Which function is used to create a sequence of numbers in R?
Seq()
Range()
Create_sequence()
Numeric()
What is the purpose of the %*% operator in R?
Element-wise multiplication of two matrices
Matrix multiplication
Division of two matrices
Exponentiation of a matrix
Which function is used to calculate factorial of a number in R?
Factorial()
Fact()
Calc_factorial()
Factor()
How can you check if a value x is in a vector my_vector in R?
X in my_vector
Is.in(x, my_vector)
Match(x, my_vector)
Find(x, my_vector)
What does the acronym "CRAN" stand for in the context of R programming?
Central Repository of Available Notations
Comprehensive R Archive Network
Commonly Recommended Algorithms in R
Computer Resource Allocation Network
In R, what is the purpose of the paste() function?
Remove leading and trailing whitespace from a string
Concatenate strings together
Find the position of a substring in a string
Replace one string with another in a character vector
How do you check if a variable exists in the R workspace?
Exists(variable_name)
Is.present(variable_name)
Variable_name.exists()
Has(variable_name)
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