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fin 510 prep assessment exam 1
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fin 510 prep assessment exam 1select the two amazon web services that we will predominantly use in this class -
question and answercompute, storage
which pricing model best describes the pricing model cloud computing follows - question
and answerrental
which type of inbound rule must you set for the AWS security group that you attach to
your EC2 - question and answerHTTP
when setting up your EC2 instance, which of the following configuration details must be
set correctly to permit access to class resources - question and answerIAM role
for this class, you'll submit lab assignments by uploading them to an S3 bucket. what
should you name this bucket so that the automated collect script can locate your
submissions - question and answerfin510-assignments-netid
in RStudio what is the terminal for - question and answerrunning operating system
commands
in RStudio what is the console for - question and answerrunning R commands
in RStudio how do you open a data frame named "mydf" to visually inspect its contents?
select all that apply - question and answerlocate "mydf" in the environment pane and
click on the data icon to the right, enter the R command "View(mydf)" in the console
R functions come bundled in... - question and answerpackages
when you are not actively using your EC2 instance, in what state should you put the
machine so that it does not incur billing charges, but also so that it can be restarted at
any time - question and answerstopped
Match each application with the description of what it is
RStudio- ?
R- ? - question and answerRStudio- an integrated development environment (IDE)
providing various tools to facilitate programming in R
R- a programming language for statistical analysis and data visualization
, In an R Markdown document, which of the following is an R code chunk containing R
code that would be evaluated when "knitting" the document? - question and answer```{r}
x <- 1
```
Which of the following will assign the string value "hello world" to the variable x and also
print the value to the screen? Select all that apply - question and answerx <- "hello
world"
x
x <- ""hello world"
print(x)
(x <- "hello world")
When using an R script to develop and run code, how is it recommended to start your
script (according to Workflow: scripts, Chapter 6 of R for Data Science)? - question and
answerStart with the R packages that you need, specified using the library() command
Vectors are data structures that contain one or more elements. Which two key
properties does every vector have? - question and answer1. its type (eg character,
double, or logical)
2. its length (the number of elements in the vector)
Selecting a subset of elements from a data structure is a task you will regularly perform
in data analytics projects. What are the three subsetting operators in R? - question and
answer[[
[
$
In the following code chunk, what must be true about condition for the code to run
without error? - question and answercondition must evaluate to TRUE or FALSE
Identify the three basic ways to loop over a vector named xs using for. - question and
answerLoop over the numberic indices eg for (i in seq_along(xs))
Loop over the names of elements in the vector eg for (nm in names(xs))
Loop over the elements of the vector eg for (x in xs)
If your R code gives you an error message and you're not immediately sure what the
problem is, what is a good first step to solving the issue? - question and answerCopy
the error message and paste it into Google (or your favorite internet search engine).
Which of the following dplyr functions allows you to subset observations or rows based
on their values? - question and answerfilter()
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