Muhammad Imdad Ullah

Student and Instructor of Statistics and business mathematics. Completed my Ph.D. in Statistics from the Department of Statistics, Bahauddin Zakariya University, Multan, Pakistan. l like Applied Statistics, Mathematics and Statistical Computing. Statistical and Mathematical software used is SAS, STATA, GRETL, EVIEWS, R, SPSS, VBA in MS-Excel. Like to use type-setting LaTeX for composing Articles, thesis, etc.

MCQs Shiny App Quiz Questions 21

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The post is about Shiny app Quiz Questions. There are 20 multiple-choice questions about R Language and Shiny App. Let us start with MCQs Shiny App Quiz Questions with Answers now.

MCQs Shiny App Quiz Questions

Online MCQs Shiny App Quiz Questions

1. A Shiny app consists of two parts, the server that the user interacts with and the UI that powers the app.

 
 

2. You must include the shinyApp() function in the code for all Shiny apps.

 
 
 
 

3. When defining the server logic for a Shiny app, you define a function that includes which of the following parameters?

 
 
 
 

4. Which function creates an empty layout?

 
 
 
 

5. Which two components of a dashboard happen on the front end?

 
 
 
 

6. Which statement best describes the varSelectInput() function?

 
 
 
 

7. Which function adds a title to a fluidPage layout?

 
 
 
 

8. If you have the command plotOutput(“plot_histogram”) in the UI-side code in your Shiny application, what is the name of the variable that you assign the plot to in the server-side code?

 
 
 
 

9. Which is the preferred method for creating a Shiny app?

 
 
 

10. which function is used to construct an initial empty UI when creating a Shiny app?

 
 
 
 

11. Which of the following is a true statement about functions found in the Shiny library?

 
 
 
 

12. Can you publish a Shiny app to your shinyapps.io account from RStudio?

 
 
 
 

13. Which deployment method should you select for your Shiny app if you do not want to run your server? Computer MCQs Test

 
 
 
 

14. Which two components of a dashboard happen on the back end?

 
 
 
 

15. In a Shiny application, where do you add input widgets?

 
 
 
 

16. Which of the following is NOT a parameter to the varSelectInput() function?

 
 
 
 

17. You use the Layout functions to organize —————- containing user interface elements in the application.

 
 
 
 

18. What are the two main differences between an R Markdown document and a Shiny dashboard? MCQs in Statistics

 
 
 
 

Online MCQs Shiny App Quiz Questions

  • Which two components of a dashboard happen on the back end?
  • Which is the preferred method for creating a Shiny app?
  • You must include the shinyApp() function in the code for all Shiny apps.
  • Which function creates an empty layout?
  • If you have the command plotOutput(“plot_histogram”) in the UI-side code in your Shiny application, what is the name of the variable that you assign the plot to in the server-side code?
  • Can you publish a Shiny app to your shinyapps.io account from RStudio?
  • In a Shiny application, where do you add input widgets?
  • Which deployment method should you select for your Shiny app if you do not want to run your server? Computer MCQs Test
  • What are the two main differences between an R Markdown document and a Shiny dashboard? MCQs in Statistics
  • A Shiny app consists of two parts, the server that the user interacts with and the UI that powers the app.
  • Which two components of a dashboard happen on the front end?
  • You use the Layout functions to organize —————- containing user interface elements in the application.
  • When defining the server logic for a Shiny app, you define a function that includes which of the following parameters?
  • Which of the following is a true statement about functions found in the Shiny library?
  • which function is used to construct an initial empty UI when creating a Shiny app?
  • Which of the following is NOT a parameter to the varSelectInput() function?
  • Which function adds a title to a fluidPage layout?
  • Which statement best describes the varSelectInput() function?

MCQs in Statistics

R Language Basic Questions

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The post is about some R Language Basic Questions. The questions are related to the use of R Language, some preliminaries in R, the Use of Rstudio, R Commander, some functions in R, etc.

R Language Basic Questions

What is Rstudio and how to use it?

The Rstudio is software used as an editor for writing R and other Language-related programming codes. To use Rstudio, follow the steps:

Step 1: Download and Install Rstudio
Step 2: Open Rstudio
Sep 3: Click on the menu: File -> New -> R Script
Step 4: Paste the R code (write it) in the new source code area. Running the R program on the command line or elsewhere will start the console. One can paste the R code in the R Console or editor area.
Step 5: Click the “Source” button above the code area.

One can also use the console in Rstudio. If a user clicks “Run” instead of “Source” user input might not work properly. One can use the R documentation.

What are Preliminaries in R?

The following are some preliminaries in R Language:

  • R is a case-sensitive language
  • # is the comment tag
  • R is installed with the default library (also called packages). One can add/import extra packages to the library using the command library().
  • To use a library function one must load it first into the memory using the command load().
  • Variable names in R language cannot start with “.” (dot), “+” (plus sign), or “=” (minus sign).

Explain What is R

R is a data analysis software that is used by analysts, quants, statisticians, data scientists, and others. R Language is a leading tool for statistics, machine learning, and data analysis. It allows for the easy creation of objects, functions, and packages.

List out some of the functions that the R Language Provides

The following is a short list of functions that R provides:

  • mean()
  • median()
  • var()
  • lm()
  • summary()
  • print()
  • glm()
  • plot()

Explain How One Can Start the R Commander GUI

To start the R Commander, type the command, library(Rcmdr) into the R console. Note that one must first install the Rcmdr package.

install.packages("Rcmdr")
# Start the R Commander GUI
library(Rcmdr)

What is R Software for Statistics and Data Analysis

R is an open-source programming language. It is a software environment for statistical computing and graphics techniques. The R language is widely used by statisticians and data miners for developing statistical software/packages and performing data analysis.

What is Mean in R?

The mean is the average of the numbers: a calculated “central” value of a set of numbers. To calculate the mean of a data set, add up all the numbers, then divide by how many numbers there are. In R, one can do this by using the command:

x = c(1, 2, 4, 7, 8, 9, 4, 8)
mean(x)
R Language Basic Questions, R FAQs

What is the Median in R?

The Median is the “middle” of a sorted list of numbers. For an even amount of numbers, things are slightly different. In the case of an even number of observations, one can find the middle pair of numbers, and then find the average of these two middlemost numbers. The median can be computed in R by using the command:

x = c(1, 2, 4, 7, 8, 9, 4, 8)
median(x)

Note that R itself decides about a number of observations either there are even or odd number of observations.

Statistics for Data Analysts

R and Database Management System Quiz 20

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The post is about R and Database 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 and Database Management System Quiz now.

Please go to R and Database Management System Quiz 20 to view the test

R and Database Management System Quiz with Answers

R and Database Management System Quiz

  • How can a relational database help R handle memory issues?
  • Which R function saves a single data structure to a .Rda file?
  • Which of the following concepts illustrates a data frame in R language?
  • When mapping data types between R and a database, which of the following should you consider converting to strings?
  • When designing a relational database, which aspect is primarily addressed by normalization techniques?
  • Which of the following is the simplest way to update individual observations in a data frame?
  • A variable in R language is comparable to which of the following relational database concepts?
  • In the context of mapping data between R and relational databases, how does logical data from R typically represent when exchanged with a database server?
  • What benefit does using a relational database with R provides even when the data does not reside in the database?
  • Choose a statement that best describes declarative referential integrity.
  • Which function in the RJDBC package is used to close the database connection after accessing the data?
  • What does RJDBC stand for?
  • Which of the following statements about database packages for R are true?
  • Which of the following statements correctly describes the ODBC Driver Manager?
  • What are the two categories of relational database access packages in R language? https://rfaqs.com
  • Which of the following is the first step that you must take before using the RJDBC package for R language? https:/rfaqs.com
  • Which of the following is one of the two components of ODBC?
  • What is the best way to provide a data analyst with knowledge of a database schema or structure, often depicted using an entity-relationship (ER) diagram?
  • Which RODBC function is best suited for retrieving information about the structure and attributes of database tables?
  • What is the first step you must complete outside of R before installing the RODBC package?

Sociology Quiz with Answers

Statistical Simulation