R programming

What is R primarily used for?

Web development

Data analysis and statistics

Game development

Mobile app development

Which symbol is used for assignment in R?

Which function is used to install packages in R?

Load()

Require()

Install.packages()

Library()

What is the head() function in R do?

Display the first few rows of a data frame

Create a new column in a data frame

Compute the mean of a vector

Remove missing values from a data frame

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)

R programming

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