R Language Quiz

MCQs Data Visualization in R 24

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The Quiz is about MCQs Data Visualization in R Programming Language. There are 20 multiple-choice questions covering different topics related to R Language Programming. Let us start with the MCQs Data Visualization in R Language now.

MCQs Data Visualization in R Languages

Online Multiple Choice Questions about Data Visualization in R Programming Language

1. In a scatter plot, what is the best way to change the color of the points based on a categorical variable?

 
 
 
 

2. Which function in ggplot adds a title to the plot?

 
 
 
 

3. A pie chart is the same as a —————– in polar coordinates.

 
 
 
 

4. Which ggplot2 function can create a complete plot given the data, mappings, and geom as parameters?

 
 
 
 

5. Which R statement creates a chart object based on the data frame “salesdata”, but allows you to vary the aesthetics from one layer to another?

 
 
 
 

6. Which plot type helps you visualize time series data?

 
 
 
 

7. Which chart is a type of part of the whole chart?

 
 
 
 

8. You added text labels to the data points on your plot, but now the plot looks messy because there are so many of them. What should you do?

 
 
 
 

9. Which parameter of the qplot() function changes the border color of the bars in a bar chart to blue?

 
 
 
 

10. You want to divide a plot into subplots based on a categorical variable called “quarters”. Which function should you add to ggplot() to do this?

 
 
 
 

11. If you do not specify a theme when creating a plot with ggplot2, which theme does it use by default?

 
 
 
 

12. The qplot() function has no defaults, giving you more control over the output.

 
 

13. Which function is used to specify appropriate names for both axes in a plot?

 
 
 
 

14. How can you improve the smoothness of a histogram?

 
 
 
 

15. Which of the following statements about histograms is true?

 
 
 
 

16. Which R packages will this course use to create data visualizations?

 
 
 
 

17. What information do you need to provide to create a visualization using the Leaflet library?

 
 
 
 

18. What can you add to a plot if you want to emphasize important elements, such as outliers or spikes in your data?

 
 
 
 

19. Which functions can you use to change the title of a plot?

 
 
 
 

20. What step must you take before you can add the coord_polar() function to ggplot() to create a pie chart?

 
 
 
 

Online MCQs Data Visualization in R Language

  • Which function in ggplot adds a title to the plot?
  • Which function is used to specify appropriate names for both axes in a plot?
  • Which R statement creates a chart object based on the data frame “salesdata”, but allows you to vary the aesthetics from one layer to another?
  • The qplot() function has no defaults, giving you more control over the output.
  • Which R packages will this course use to create data visualizations?
  • Which chart is a type of part of the whole chart?
  • Which ggplot2 function can create a complete plot given the data, mappings, and geom as parameters?
  • Which of the following statements about histograms is true?
  • A pie chart is the same as a —————– in polar coordinates.
  • Which parameter of the qplot() function changes the border color of the bars in a bar chart to blue?
  • How can you improve the smoothness of a histogram?
  • What step must you take before you can add the coord_polar() function to ggplot() to create a pie chart?
  • In a scatter plot, what is the best way to change the color of the points based on a categorical variable?
  • Which plot type helps you visualize time series data?
  • Which functions can you use to change the title of a plot?
  • What can you add to a plot if you want to emphasize important elements, such as outliers or spikes in your data?
  • You want to divide a plot into subplots based on a categorical variable called “quarters”. Which function should you add to ggplot() to do this?
  • What information do you need to provide to create a visualization using the Leaflet library?
  • You added text labels to the data points on your plot, but now the plot looks messy because there are so many of them. What should you do?
  • If you do not specify a theme when creating a plot with ggplot2, which theme does it use by default?

statistics and data analysis

R Language Basic Quiz 23

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The post is about the “R Language Basic Quiz” which will help you check your ability to execute some basic or R Language, RStudio, Jupyter Notebook, and Google Colab. This quiz will help the learner to understand some basic concepts related to R Programming Language. This quiz may also improve your computational understanding, and it will also help you to learn and practice the R language Basic Quiz now.

R Language Basic Quiz with Answers
Please go to R Language Basic Quiz 23 to view the test

R Language Basic Quiz

  • Where can you type R commands in RStudio?
  • Which R library will you use for data visualizations such as histograms, bar charts, and scatterplots?
  • Which is the command used to install packages in R?
  • Which of the following is True about R language?
  • What is a great alternative to Jupyter Notebooks when programming in R?
  • Jupyter Notebooks is the tool most R developers use.
  • What type of environment is RStudio?
  • In a box plot, in which quartile does 50% of the sorted data fall below?
  • What does “CRAN” stand for in the context of R programming?
  • With data binning, observations are often organized into defined intervals called quartiles. Which quartile is the median of the dataset?
  • Which function replaces missing values in a dataset?
  • Which of the following is NOT a task facilitated by R?
  • Which of the following statements about Jupyter Notebook is correct?
  • Which of the following is a lightweight tool built from Jupyterlab components?
  • Which among the following is a cloud-based Jupyter notebook that can be saved on Google Drive?

Statistics Software and Data Analysis

R Language and Relational Databases Quiz 22

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The post is about R Language and Relational Databases Management System Quiz with Answers. There are 20 multiple-choice questions about R language and database connectivity with R. Let us start with the R Language and Relational Databases Management System Quiz now.

Please go to R Language and Relational Databases Quiz 22 to view the test

R Language and Relational Databases Quiz

  • Which R function loads multiple R data structures from a *.Rda file?
  • Which of the following R variables holds the platform numeric limits for your R environment?
  • What is the role of the ODBC Driver Manager in the context of database connectivity? https://rfaqs.com
  • Suppose you are preparing to analyze sales data and have much information in an Excel spreadsheet. You have decided to convert the Excel spreadsheet to a relational database. What is your first step?
  • Which of the following correctly describes the condition for the referential constraint to occur?
  • Why is the SQL LOAD command recommended over the IMPORT command for large amounts of data?
  • What are two reasons to map an existing data source, like pre-existing database tables, database dump files, or raw data, to a relational database design?
  • Suppose, There are two tables in your database design: Customers, which lists all your customers, and Orders, which lists all the sales transactions that your customers have made over the years. Both the tables have a field called Customer_ID. Which of the following describes the relationship between the two tables?
  • What is the SQL DDL command that can be used to add primary keys to an existing table in a database?
  • What is the recommended SQL command for loading small to medium amounts of data into a database?
  • What are two ways to limit database movement and increase performance when querying a database?
  • What type of relationship does the database model indicate between each school board and multiple schools?
  • Which method is recommended to avoid unnecessary data transfer when analyzing data with a powerful database engine?
  • Which statement best describes data definition language (DDL) operations?
  • Which of the following is the correct general syntax for the INSERT statement?
  • Which statement best describes what a factor is in R?
  • Which SQL statement is used to delete records from a table?
  • Which of the following displays the correct general syntax for the SELECT statement that also includes a predicate?
  • What is a primary key?
  • Which of the following is classified as a data manipulation language (DML) statement?
R Language and Relational Databases Quiz with Answers

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