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Dear candidates you will find MCQ questions of R Programming here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
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Q. Which function is used to automatically vectorize?

(A) lapply()
(B) kapply()
(C) mapply()
(D) happly()

Q. How can we define 'undefined value' in R language?

(A) Inf
(B) Sup
(C) Und
(D) NaN

Q. What is the function used to test objects (returns a logical operator) if they are NA?

(A) is.na()
(B) is.nan()
(C) as.na()
(D) as.nan()

Q. Which is simpler for statistical programming?

(A) C
(B) Java
(C) R
(D) No language

Q. The longer programs are called . . . . . . . .

(A) Files
(B) Structures
(C) Scripts
(D) Data

Q. Which of the R following code is example of explicit printing?

(A) > x <- 5 > x
(B) > x <- 5 > print(x)
(C) > x <- "auto" > x
(D) > x <- "auto" > x <- "auto"

Q. What is the meaning of the following R function?
x <- c(4, 5, 1, 2, 3, 3, 4, 4, 5, 6)
x <- as.factor(x)

(A) x becomes a factor
(B) x is a factor
(C) x does not exist
(D) x is not a vector

Q. R runs on the . . . . . . . . operating system.

(A) Linux
(B) Windows
(C) Ubuntu
(D) Any operating system

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