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Welcome to the Scoping Rules and Debugging MCQs Page

Dive deep into the fascinating world of Scoping Rules and Debugging with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Scoping Rules and Debugging, a crucial aspect of R Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Scoping Rules and Debugging, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within R Programming.

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Check out the MCQs below to embark on an enriching journey through Scoping Rules and Debugging. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of R Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Scoping Rules and Debugging. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Scoping Rules and Debugging MCQs | Page 1 of 6

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Q1.
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 }

Discuss
Answer: (a).function(x) { x * x }
Q2.
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

Discuss
Answer: (b).The search list can be found by using the search() function
Q3.
A function, together with an environment, makes up what is called a ______ closure.

a.

formal

b.

function

c.

reflective

d.

symmetry

Discuss
Answer: (b).function
Q4.
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

Discuss
Answer: (c).z
Q5.
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

Discuss
Answer: (a).The order of the packages on the search list does not matter
Q6.
R uses _________ scoping or static scoping.

a.

reflective

b.

transitive

c.

lexical

d.

closure

Discuss
Answer: (c).lexical
Q7.
The only environment without a parent is the ________ environment.

a.

full

b.

half

c.

null

d.

empty

Discuss
Answer: (d).empty
Q8.
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

Discuss
Answer: (a).scoping rules
Q9.
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()

Discuss
Answer: (b).make.power()
Q10.
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

Discuss
Answer: (d).Error
Page 1 of 6

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