R Language Quiz

The quiz “R Language MCQS ggplot2” will help you check your ability to execute some basic operations on objects in the R language, and it will also help you understand some basic concepts. This quiz may also improve your computational understanding.

R Language MCQs ggplot2 Function

• What is the class of the object defined by the expression? x <- c(4,5,10)?  
• In R the following are all atomic data types EXCEPT:
• For the population y<-c(1,2,3,4,5), write the R command to find the mean.
• For the population y<-c(1,2,3,4,5), write the R command to find the median.
• Let us have 1000 random samples of size 6 under SRSWOR using the following population (111, 150, 121, 198, 112, 136, 114, 129, 117, 115, 186, 110, 121, 115, 114) which is the R command for repeating this procedure 1500 times?
• Which is the R command for obtaining 1000 random numbers through normal distribution with mean 0 and variance 1?
• How sampling with and without replacement can be done using R?
• Write the R commands for generating 700 random variables from normal distribution by using the following information: Mean = 14, SD = 3, n = 5, k = 2000.
• Suppose you want to simulate a coin toss 20 times in R. Write the command.
• When programming in R, what is a pipe used as an alternative for?
• Which of the following are standards of tidy data?
• Which summary functions can you use to preview data frames in R Language?
• Which R function can be used to make changes to a data frame?
• Why are tibbles a useful variation of data frames?
• Data analysts are cleaning their data in R.
• They want to be sure that their column names are unique and consistent to avoid any errors in their analysis. What R function can they use to do this automatically?
• Data analysts are working with customer information from their company’s sales data. The first and last names are in separate columns, but they want to create one column with both names instead. Which of the following functions can they use?
• A data scientist is trying to print a data frame but when you print the data frame to the console output produces too many rows and columns to be readable. What could they use instead of a data frame to make printing more readable?
• A data analyst is working with the penguin’s data. They write the following code: penguins %>% The variable species includes three penguin species: Adelie, Chinstrap, and Gentoo. What code chunk does the analyst add to create a data frame that only includes the Gentoo species?
• You are cleaning a data frame with improperly formatted column names. To clean the data frame you want to use the clean_names() function. Which column names will be changed using the clean_names() with default parameters?
• In ggplot2, an ———- is a visual property of an object in your plot.

R Language MCQs 2

Computer MCQs Online Test

R Basics Online Quiz: The R language is a free and open-source language developed by Ross Ihaka and Robert Gentleman in 1991 at the University of Auckland, New Zealand. The R Language is used for statistical computing and graphics to clean, analyze, and graph your data. Let us start with the R Basics Online Quiz.

Please go to R Basics Online Quiz 7 to view the test

R Basics Online Quiz with Answers

• A sequence of integer values can be created using the operator
• R is an ———— programming language
• The ———— is your current R working environment that includes user-defined objects
• Which of the following software is used for statistical analysis in R
• R was named partly after the first names of ———— R authors.
• The R console is a tool that is used to write (insert) standard
• In R, an object name cannot start with
• The file “.RData” in the current R session is
• Which of the following describes R Language best
• R Language functionality is divided into a number of ————
• GUI stands for
• What does CRAN stand for ————?
• In 1991 R Language was created by Ross Ihaka and Robert Gentleman in the Department of Statistics at the University of ————.
• ———— developed R language
• Factors in R, are used to represent the
• Which of the following functions can a data analyst use to get a statistical summary of their dataset?
• A data analyst inputs the following command: quartet %>% group_by(set) %>% summarize(mean(x), sd(x), mean(y), sd(y), cor(x, y)). Which of the functions in this command can help them determine how strongly related their variables are?
• In ggplot2, you can use the ———— function to specify the data frame to use for your plot.
• What type of plot will the following code create? ggplot(data = penguins) + geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g))
• A data analyst wants to create the date February 27th, 2027 using the lubridate functions. Which of the following are examples of code that would create this value?

MCQs General Knowledge

MCQs in Statistics

The article is about “Quiz R Programming” which covers different aspects of debugging a function’s execution. Let us start with the Quiz R Programming Debug.

Please go to Important Quiz R Programming Debug 6 to view the test

Debugging is an essential skill in programming, including R programming. In R Programming Language, the debug() function in R allows the user to step through the function’s execution, line by line. At any point, we can print out values of variables or produce a graph of the results within the function.

Quiz R Programming with Answers

• Debugging is the process of
• Which of the following functions initiates an interactive debugging environment that allows you to step through code one expression at a time?
• Which of the following functions allows you to temporarily insert pieces of code into other functions to modify their behavior?
• What does the traceback() function do?
• When should the traceback() function be called?
• What does calling trace(“f”) for function “f( )” do
• What is the microbenchmark package useful for?
• What does the Rprof( ) function do?
• What does the profvis( ) function do?
• Which function is better for analyzing fast-running functions: profvis( ) or microbenchmark( )?
• In R, what includes reusable functions and documentation about how to use the functions?
• What is the name of the popular package archive dedicated to supporting R users’ authentic, validated code?
• You want to create a vector with the values 21, 12, 39, in that exact order. After specifying the variable, what R code chunk lets you create the vector?
• You are compiling an analysis of the average monthly costs for your company. What summary statistic function should you use to calculate the average?
• You are working with a large data frame. It contains so many columns that they don’t all fit on the screen simultaneously. You want a quick list of all the column names to understand better what is in their data. What function should they use?
• Where in RStudio can you find the export menu for saving plots?
• Which of the following files in R have names that follow widely accepted naming convention rules?
• You want to store a vector in a variable. What type of operator would you use to do this?  
• You want to create functions, documentation, sample data sets, and code tests they can share and reuse in other projects. What should you create to help them accomplish this?  
• A data analyst wants a high-level summary of the structure of their data frame, including the column names, the number of rows and variables, and the type of data within a given column. What function should they use?

Statistics and Data Analysis

Online Quiz Website with Answers