R and Database Management System Quiz 20

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.

Online MCQs about R and Database management system Quiz with Answers

1. What is the first step you must complete outside of R before installing the RODBC package?

 
 
 
 

2. What benefit does using a relational database with R provides even when the data does not reside in the database?

 
 
 
 

3. Which R function saves a single data structure to a .Rda file?

 
 
 
 

4. A variable in R language is comparable to which of the following relational database concepts?

 
 
 
 

5. Which of the following is the first step that you must take before using the RJDBC package for R language? https:/rfaqs.com

 
 
 
 

6. What are the two categories of relational database access packages in R language? https://rfaqs.com

 
 
 
 

7. When mapping data types between R and a database, which of the following should you consider converting to strings?

 
 
 
 

8. When designing a relational database, which aspect is primarily addressed by normalization techniques?

 
 
 
 

9. Which of the following statements correctly describes the ODBC Driver Manager?

 
 
 
 

10. Choose a statement that best describes declarative referential integrity.

 
 
 
 

11. Which RODBC function is best suited for retrieving information about the structure and attributes of database tables?

 
 
 
 

12. Which of the following is one of the two components of ODBC?

 
 
 
 

13. What does RJDBC stand for?

 
 
 
 

14. Which of the following statements about database packages for R are true?

 
 
 
 

15. Which function in the RJDBC package is used to close the database connection after accessing the data?

 
 
 
 

16. 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?

 
 
 
 

17. 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?

 
 
 
 

18. Which of the following concepts illustrates a data frame in R language?

 
 
 
 

19. How can a relational database help R handle memory issues?

 
 
 
 

20. Which of the following is the simplest way to update individual observations in a data frame?

 
 
 
 

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?

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R Programming Quiz 19

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

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Online R Programming Quiz with Answers

  • What is the main reason for using the R language?
  • In R, what is the result of the function as.numeric(TRUE)?
  • In R, variables are typically assigned using <-, but they can also be assigned using which of the following symbols?
  • Which command in R would return the following character vector? “Imdad” “Usman” “Ali” “Amir”
  • In R, assume you have a vector named “age,” and each element in the vector is the age of one person in a group. The vector has the following content: 24 32 46 19. What will be the result if you issue the age[-2] command?
  • Assume the array books_array contains 6 elements. The array has three rows and two columns and appears as follows:

    [,1]              [,2]
[1,] “It”              “Dr. Sleep”
[2,] “Misery”          “Carrie”
[3,] “The Shining”   “The Mist”

Which of the following commands will return “The Shining”?

  • In R language, which command returns the last six elements of a data object such as a data frame?
  • Assume that the function add is defined as follows:
    add <- function(x,y) {
    (x + y)
    return (x – y)
    temp <<- (x * y)
    return (x / y)
    }
    What will be the output if you issue the command add(10,5)?
  • What is the first step you must take before you can read an Excel spreadsheet in R?
  • After installing and calling the httr library in R, which method should you use to update a resource?
  • In R, what is the result of the function as.integer(3.3)?
  • In R, which command removes a variable from memory?
  • In R, assume a character vector called “names” has the following contents: “Harry” “Jimmy” “Tammy” Which command would return the following logical vector? FALSE TRUE FALSE
  • In R, assume you have a vector named “age,” and each element in the vector is the age of one person in a group. Which command must you use to reorder the ages from youngest to oldest?
  • In R, which command will output the data from the Nile built-in data set?
  • In R, which command should you use to insert a new row into a data frame?
  • To perform a one-way Analysis of variance, one can use a function
  • How many elements will be in vector $b$, if b <- 10:15
  • All columns in a matrix must have the
  • For a matrix $X$ of order $n\times p$ and a vector $Y$ of order $n\times 1$, one can find regression coefficients using
R Programming Quiz with Answrs

Statistics and Data Analysis

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R Programming Quiz Questions and Answers 18

This post is about “R Programming Quiz Questions and Answers”. There are 20 multiple-choice type questions from R programming covering topics related to the output of different R commands, R console, matrices, data frames, factors, vectors, R objects, and different operations on R objects. Let us start with R Programming Quiz Questions and Answers.

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R FAQS R Programming Quiz Questions and Answers

R Programming Quiz Questions and Answers

  • The output of seq(10, 1, -2) is
  • What will be the output of the following lines of code? x <- 31 if (x %% 2 == 0){ print(“X is even”) }else { print(“X is odd”) }
  • What would be the output of 1:5 + 5:1.
  • What will be the output of the following x <- vector(“numeric”, length = 10); print(x)
  • What would be the output of the following code? x <- 1:4 y <- 6:9 z <- x + y print(z)
  • What will be the output of the following X <- factor(c(“yes”, “yes”, “yes”, “no”, “yes”, “no”, “no”) table(X)
  • The output of the seq(1, 10, 2) is
  • What will be the output of the following code X <- factor(c(“m”, “m”, “m”, “f”, “m”, “f”, “f”) table(X)
  • What is the output of 1:4 + 4:1
  • R console is a tool that is used to write (insert) standard
  • The following command will find the 60th percentile for the variable $disp$
  • The multiplication of two matrices $A$ and $B$ can be performed in R using the operator
  • Which command will create a matrix of the first 9 numbers in 3 rows and 3 columns?
  • When we compare two vectors element by element the resultant outcome is a
  • Which of the following function can be used to create a vector having repeated values
  • The Vectors, data frames, or matrices containing decimal values can be converted to integers using
  • What is the data type of vector $a$ if a <- c(1, “m”, FALSE)
  • All columns in a matrix must have the
  • To perform one-way Analysis of variance, one can use function
  • In R, object name cannot start with
R Programming Quiz Questions and Answers

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