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 may also improve your computational understanding.

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.

### 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?

R Language Test 2