R Language MCQs 2

This quiz “MCQs R Language” 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.

1. _________ is function in R to get number of observation in a data frame


2. If I have two vectors x <- c(1,3, 5) and y <- c(3, 2, 10), what is produced by the expression rbind(x, y)?


3. Suppose I have a vector x <- c(3, 5, 1, 10, 12, 6) and I want to set all elements of this vector that are less than 6 to be equal to zero. What R code achieves this?


4. Suppose I have a vector x <- 1:4 and y <- 2:3. What is produced by the expression x + y?


5. If I execute the expression x <- 4 in R language, what is the class of the object “x” as determined by the “class()” function?


6. A key property of vectors in R language is that


7. The definition of free software consists of four freedoms (freedoms 0 through 3). Which of the following is NOT one of the freedoms that are part of the definition?


8. What function is used to test the missing observation in data frame


9. Suppose I have a list defined as x <- list(2, “a”, “b”, TRUE). What does x[[2]] give me?


10. The R language is a dialect of which of the following programming languages?


11. What is the class of the object defined by the expression x <- c(4, “a”, TRUE)?


12. In R language the following are all atomic data types EXCEPT


For More R Quiz, Visit R Language MCQs 1