Que.What will be the output of the following R code snippet?> lm <- function(x) { x * x }
> lm
|
| a. function(x) { x * x } |
| b. func(x) { x * x } |
| c. function(x) { x / x } |
| d. function { x $ x } |
Que.Point out the correct statement?
|
| a. The search list can be found by using the searchlist() function |
| b. The search list can be found by using the search() function |
| c. The global environment or the user’s workspace is always the second element of the search list |
| d. R has separate namespaces for functions and non-functions |
The search list can be found by using the search() function
Que.A function, together with an environment, makes up what is called a ______ closure.
|
| a. formal |
| b. function |
| c. reflective |
| d. symmetry |
Que.Which of the variable in the following R code is variable?> f <- function(x, y) {
+ x^2 + y / z
+ }
|
| a. x |
| b. y |
| c. z |
| d. yy |
Que.Point out the wrong statement?
|
| a. The order of the packages on the search list does not matter |
| b. R has separate namespaces for functions and non-functions |
| c. Users can configure which packages get loaded on startup so if you are writing a function |
| d. The search list can be found by using the search() function |
The order of the packages on the search list does not matter
Que.R uses _________ scoping or static scoping.
|
| a. reflective |
| b. transitive |
| c. lexical |
| d. closure |
Que.The only environment without a parent is the ________ environment.
|
| a. full |
| b. half |
| c. null |
| d. empty |
Que.The ________ for R are the main feature that make it different from the original S language.
|
| a. scoping rules |
| b. closure rules |
| c. environment rules |
| d. closure and environment rules |
Que.The _________ function is a kind of “constructor function” that can be used to construct other functions.
|
| a. make.pow() |
| b. make.power() |
| c. keep.power() |
| d. keep.pow() |
Que.What will be the output of the following R code snippet?> g <- function(x) {
+ a <- 3
+ x+a+y
+ ## 'y' is a free variable
+ }
> g(2)
|
| a. 9 |
| b. 42 |
| c. 8 |
| d. Error |