Intro to R Day 1 Quiz
Authored by John Rabanal
Computers
University
Used 2+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a correct syntax to output "Hello World" in R?
'Hello World'
"Hello World"
print("Hello World")
All of the answers are correct.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you insert COMMENTS in R code?
# This is a comment
// This is a comment
/* This is a comment
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you create a variable named x with the numeric value 5?
x <- 5
x == 5
int x = 5
x : 5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct way to create a vector of strings?
fruits <- v("banana", "apple", "orange")
fruits <- listOf("banana", "apple", "orange")
fruits <- c("banana", "apple", "orange")
fruits <- list("banana", "apple", "orange")
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct way to create a list of strings?
fruits <- vectorOf("banana", "apple", "orange")
fruits <- v("banana", "apple", "orange")
fruits <- list("banana", "apple", "orange")
fruits <- c("banana", "apple", "orange")
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which function is used to add additional columns in a matrix?
add()
join()
append_item()
cbind()
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which function is used to find the amount of rows and columns in an matrix/array?
length()
dim_len()
dim()
nchar()
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