Data Structures In R Programming - Study Mode

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[#41] What will be the output of the following R code? > x <- Sys.time()
> class(x)

(A) "POSIXct" "POSIXt"

(B) "POSIXXt" "POSIXt"

(C) "POSIXct" "POSIct"

(D) "POSIXt" "POSIXt"

Correct Answer

(A) "POSIXct" "POSIXt"

[#42] . . . . . . . . function is similar to the existing subset() function in R but is quite a bit faster.

(A) rename

(B) filter

(C) set

(D) subset

Correct Answer

(B) filter

[#43] Which of the following is used for reading in saved workspaces?

(A) unserialize

(B) load

(C) get

(D) set

Correct Answer

(B) load

[#44] What will be the output of the following R code? > x <- 1:4
> x > 2

(A) 1 2 3 4

(B) FALSE FALSE TRUE TRUE

(C) 1 2 3 4 5

(D) 5 4 3 1 2 1

Correct Answer

(B) FALSE FALSE TRUE TRUE

[#45] What will be the output of the following R code? > x <- matrix(1:6, 2, 3)
> x[1, 2]

(A) 3

(B) 2

(C) 1

(D) 0

Correct Answer

(A) 3