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R Basics Interview Questions and Answers
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Questions
R Basics
0
votes
Q: What is the class of the object defined by x <- c(4, TRUE)?
answered
Jun 15
in
R Basics
by
john ganales
r-object
0
votes
Q: If I execute the expression x <- 4 in R, what is the class of the object 'x' as determined by the `class()' function?
answered
Jun 15
in
R Basics
by
john ganales
r-expression
0
votes
Q: In R the following are all atomic data types EXCEPT
answered
Jun 15
in
R Basics
by
john ganales
r-data-types
0
votes
Q: 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?
answered
Jun 15
in
R Basics
by
john ganales
r-definition
0
votes
Q: R was developed by statisticians working at...
answered
Jun 15
in
R Basics
by
john ganales
statisticians
r-developer
0
votes
Q: mystery_method <- function(x) { function(z) Reduce(function(y, w) w(y), x, z) }
answered
Jun 15
in
R Basics
by
john ganales
r-function
0
votes
Q: dplyr <- "ggplot2"
answered
Jun 15
in
R Basics
by
john ganales
ggplot2
0
votes
Q: Say I have...
answered
Jun 15
in
R Basics
by
john ganales
r-function
0
votes
Q: How do you test R code? Can you write a test for the function you wrote in #6?
answered
Jun 15
in
R Basics
by
john ganales
rcode
0
votes
Q: Can you write me a function in R that replaces all missing values of a vector with the mean of that vector?
answered
Jun 15
in
R Basics
by
john ganales
rreplaces
0
votes
Q: I want to know all the values in c(1, 4, 5, 9, 10) that are not in c(1, 5, 10, 11, 13). How do I do that with one built-in function in R? How could I do it if that function didn't exist?
answered
Jun 15
in
R Basics
by
john ganales
-function
0
votes
Q: What is f(3) where:
answered
Jun 15
in
R Basics
by
john ganales
r-basics
0
votes
Q: What is the difference between seq(4) and seq_along(4)?
answered
Jun 15
in
R Basics
by
john ganales
seq
seq_along
0
votes
Q: What is the difference between sapply and lapply? When should you use one versus the other? Bonus: When should you use vapply?
answered
Jun 15
in
R Basics
by
john ganales
sapply
lapply
0
votes
Q: What if I concatenate a number and NA?
answered
Jun 15
in
R Basics
by
john ganales
concatenate-number
0
votes
Q: What is the difference between a matrix and a dataframe?
answered
Jun 15
in
R Basics
by
john ganales
matrix
data-frame
0
votes
Q: If I have a data.frame df <- data.frame(a = c(1, 2, 3), b = c(4, 5, 6), c(7, 8, 9))...
answered
Jun 15
in
R Basics
by
john ganales
data-frame
0
votes
Q: Explain how data is aggregated in R?
answered
Feb 22
in
R Basics
by
SakshiSharma
data-aggegation
0
votes
Q: In R how missing values are represented ?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-values
0
votes
Q: Explain general format of Matrices in R?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-matrices
0
votes
Q: What are the data structures in R that is used to perform statistical analyses and create graphs?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-functions
0
votes
Q: Explain what is With () and By () function in R is used for?
answered
Feb 22
in
R Basics
by
SakshiSharma
with-function
by-function
0
votes
Q: Explain what is t-tests in R?
answered
Feb 22
in
R Basics
by
SakshiSharma
t-tests
0
votes
Q: Mention how you can produce co-relations and covariances?
answered
Feb 22
in
R Basics
by
SakshiSharma
co-relations
r-language
0
votes
Q: How can you save your data in R?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-data
0
votes
Q: Explain how R commands are written?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-commands
0
votes
Q: Mention what does not ‘R’ language do?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-language
0
votes
Q: In R how you can import Data?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-input-data
0
votes
Q: List out some of the function that R provides?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-functions
0
votes
Q: Explain what is R?
answered
Feb 22
in
R Basics
by
SakshiSharma
r-language
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