R Basics Online Quiz 7

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.

This quiz is about R Basics, covering the topics of R sequence operator, R objects, R Environment, and many more.

1. R is an _____________ programming language

 
 
 
 

2. In 1991 R Language was created by Ross Ihaka and Robert Gentleman in the Department of Statistics at the University of ____________.

 
 
 
 

3. Which of the following software is used for statistical analysis in R

 
 
 
 

4. The file “.RData” in the current R session is

 
 
 
 

5. Which of the following describes R Language best

 
 
 
 

6. In R, an object name cannot start with

 
 
 
 

7. What does CRAN stand for _________ ?

 
 
 
 

8. The R console is a tool that is used to write (insert) standard

 
 
 
 

9. Factors in R, are used to represent the

 
 
 
 

10. GUI stands for

 
 
 
 

11. 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?

 
 
 
 

12. R was named partly after the first names of _____________ R authors?

 
 
 
 

13. ___________ developed R language

 
 
 
 

14. Which of the following functions can a data analyst use to get a statistical summary of their dataset?

 
 
 
 

15. The ______________ is your current R working environment that includes user-defined objects

 
 
 
 

16. R Language functionality is divided into a number of ________

 
 
 
 

17. In ggplot2, you can use the __________ function to specify the data frame to use for your plot.

 
 
 
 

18. A data analyst wants to create the date February 27th, 2027 using the lubridatefunctions. Which of the following are examples of code that would create this value?

 
 
 
 

19. A sequence of integer values can be created using the operator

 
 
 
 

20. What type of plot will the following code create?
ggplot(data = penguins) +
geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g))

 
 
 
 

Frequently Asked Questions About R
R Basics Online Quiz

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

Important Quiz R Programming Debug 6

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.

MCQs Quiz R Programming Debug

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

Important MCQs R Vectors Data Structure 5

This quiz “MCQs R Vectors” covers the topics related to creating different types of vectors in R, vector operations, Functions for vectors, naming, and concatenating vectors in R. Let us start with the Quiz on MCQs R Vectors.

Please go to Important MCQs R Vectors Data Structure 5 to view the test

In R Langauge, a vector data type is a fundamental data structure that represents a sequence of elements having the same data type. R Vectors can be of various types, including numeric, character, logical, and more.

MCQs R Vectors Data Structure

MCQs R Vectors

  • The following command can be used to print an object “x” in R.
  • What is the output of the following R code? r <- 0:10 r[2]
  • ________ operator is used to create integer sequences.
  • What is the output of the following R code? y <- 0:5 vector(y) y[3]
  • How can one define ‘infinity’ in R Language? How can one define ‘undefined value’ in R Language?
  • What is the output of the following R code? x <- c(“a”, “b”) as.numeric(x)
  • Identify the wrong statement:
  • If a command is incomplete at the end of a line, R will give a different prompt, by default it is _____
  • Which of the described R Language best
  • Which function can you use to create a different plot for each type of cut of diamond?
  • A data analyst inputs the following code in RStudio: sales_1 <- 100 * sales_2. Which of the following types of operators does the analyst use in the code?
  • What are ggplot2, tidyr, dplyr, and forcats all a part of?
  • Which tidyverse package is used for data visualization?
  • An analyst is organizing a dataset in RStudio using the following code: arrange(filter(Storage_1, inventory >= 40), count)
  • Which of the following examples is a nested function in the code?
  • Which tidyverse package contains a set of functions, such as select(), that help with data manipulation?
  • Which of the following statements about vectors in R is correct?
  • A data analyst finds the code mdy(10211020) in an R script. What is the year of the date that is created?
  • A data analyst wants to combine values using mathematical operations. What type of operator would they use to do this?
  • A data analyst wants to store a sequence of data elements with the same data type in a single variable. What R concept allows them to do this?

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