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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 2 of 6

Q11.
________ functions can be “built which contain all of the necessary data for evaluating the function.
Discuss
Answer: (a).Objective
Discuss
Answer: (a).Dynamic scoping turns out to be particularly useful for simplifying statistical computations
Q13.
Which of the following language supports lexical scoping?
Discuss
Answer: (d).All of the mentioned
Q14.
_________ require you to pass a function whose argument is a vector of parameters.
Discuss
Answer: (c).opt()
Discuss
Answer: (a).An environment is a collection of (symbol, value) pairs, i.e. x is a symbol and 3.14 might be its value
Q16.
What will be the output of the following R code?
function(p) {
          params[!fixed] <- p
          mu <- params[1]
          sigma <- params[2]
## Calculate the Normal density
          a <- -0.5*length(data)*log(2*pi*sigma^2)
          b <- -0.5*sum((data-mu)^2) / (sigma^2)
          -(a + b)
}
> ls(environment(nLL))
Discuss
Answer: (c).“data” “fixed” “params”
Q17.
What will be the output of the following R code?
> nLL <- make.NegLogLik(normals, c(FALSE, 2))
> optimize(nLL, c(-1, 3))$minimum
Discuss
Answer: (d).empty
Q18.
What will be the output of the following R code?
> nLL <- make.NegLogLik(normals, c(1, FALSE))
> optimize(nLL, c(1e-6, 10))$minimum
Discuss
Answer: (b).1.800596
Q19.
The _________ function is used to plot negative likelihood.
Discuss
Answer: (a).plot()
Q20.
What will be the output of the following R code?
> g <- function(x) {
+               a <- 3
+               x+a+y
+             ## 'y' is a free variable
+ }
> y <- 3
> g(2)
Discuss
Answer: (c).8
Page 2 of 6

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