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LinkedInR Programming Assessment Answers 2023: Today In this post I will show You LinkedIn R Programming Assessment Answers 2023

LinkedIn R Programming Assessment Answers

Q1. How does a matrix differ from a data frame?

A matrix may contain numeric values only.
A matrix must not be singular.
A data frame may contain variables that have different modes.
A data frame may contain variables of different lengths.

Q2. What value does this statement return?

unclass(as.Date(“1971-01-01”))

1
365
4
12

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Q3. What do you use to take an object such as a data frame out of the workspace?

remove()
erase()
detach()
delete()

Q4. Review the following code. What is the result of line 3?

xvect<-c(1,2,3)
xvect[2] <- “2”
xvect

[1] 1 2 3
[1] “1” 2 “3”
[1] “1” “2” “3”
[1] 7 9

LinkedIn R Programming Assessment Answers

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Q5. The variable height is a numeric vector in the code below. Which statement returns the value 35?

height(length(height))
height[length(height)]
height[length[height]]
height(5)

Q6. In the image below, the data frame is named rates. The statement sd(rates[, 2]) returns 39. As what does R regard Ellen’s product ratings?

sample with replacement
population
trimmed sample
sample <– not sure

Q7. Which choice does R regard as an acceptable name for a variable?

Var_A!
\_VarA
.2Var_A
Var2_A

Q8. What is the principal difference between an array and a matrix?

A matrix has two dimensions, while an array can have three or more dimensions.
An array is a subtype of the data frame, while a matrix is a separate type entirely.

A matrix can have columns of different lengths, but an array’s columns must all be the same length.
A matrix may contain numeric values only, while an array can mix different types of values.

Q9. Which is not a property of lists and vectors?

type
length
attributes
scalar

Q10. Which function displays the first five rows of the data frame named pizza?

BOF(pizza, 5)
first(pizza, 5)
top(pizza, 5)
head(pizza, 5)