R Language Test 2

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

Online MCQs about R Programming Language with Answers

1. Which of the following method make a vector of repeated values?

 
 
 
 

2. _______ applies a function over the margins of an array

 
 
 
 

3. The lapply( ) function takes _______ arguments

 
 
 
 
 

4. Why would a data analyst want to use the CRAN network when working with RStudio?

 
 
 
 

5. What would be the output of the following code?
> x <- 1:4
> x > 2

 
 
 
 

6. What would be the output of the following code?

> x <- 1:4
> y <- 6:9
> z <- x + y
> z

 
 
 
 

7. Which of the following is an example of a vectorized operation for subtraction operation

> x<- 1:4
> y<- 6:9

 
 
 
 

8. _______ loop over a list and evaluate a function on each element

 
 
 
 

9. A matrix is _______ dimensional rectangular data set.

 
 
 
 

10. The ________ function takes a vector or other objects and splits it into groups determined by a factor or list of factors.

 
 
 
 

11. Which of the following is used for Statistical analysis in R language?

 
 
 
 

12. R functionality is divided into a number of

 
 
 
 

13. R comes with a ________ to help you optimize your code and improve its performance.

 
 
 
 

14. When working in R, for which part of the data analysis process do analysts use the tidyr package?

 
 
 
 

15. ______ function is same as lapply( )

 
 
 
 

16. An analyst is checking the value of the variable x using a logical operator, so they run the following code:

x > 35 & x < 65

Which values of x would return TRUE when the analyst runs the code? Select all that apply.

 
 
 
 

17. Which of the following is a base package for the R language?

 
 
 
 

18. ____ ____is used to apply a function over subsets of a vector

 
 
 
 

19. The debug( ) flags a function for ______ mode in R mode.

 
 
 
 

20. What would be the value of the following expression?

> log(-1)

 
 
 
 


The R language Test covers some looping functions such asapply(), lapply(), mapply(), sapply(), and tapply(). Results from the execution of r codes are also asked.

rfaqs.com R Language Test

Online R Language Test

  • Which of the following is a base package for the R language?
  • R comes with a to help you optimize your code and improve its performance.
  • The debug( ) flags a function for mode in R mode.
  • A matrix is _________ a dimensional rectangular data set.
  • The function takes a vector or other objects and splits it into groups determined by a factor or list of factors.
  • The lapply( ) function takes arguments
  • ________is used to apply a function over subsets of a vector
  • ________ applies a function over the margins of an array
  • _________ function is the same as lapply( ) __________ loop over a list and evaluate a function on each element
  • Which of the following methods makes a vector of repeated values?
  • Which of the following is used for Statistical analysis in R language?
  • R functionality is divided into a number of
  • Which of the following is an example of a vectorized operation for subtraction operation > x<- 1:4 > y<- 6:9 What would be the output of the following code? > x <- 1:4 > y <- 6:9 > z <- x + y > z
  • What would be the output of the following code? > x <- 1:4 > x > 2
  • What would be the value of the following expression? > log(-1)
  • “An analyst is checking the value of the variable x using a logical operator, so they run the following code:x > 35 & x < 65
    Which values of x would return TRUE when the analyst runs the code? Select all that apply.”
  • When working in R, for which part of the data analysis process do analysts use the tidyr package?
  • Why would a data analyst want to use the CRAN network when working with RStudio?

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