RStudio IDE setup in R Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of RStudio Console Command

What is the output of this R code when run in RStudio console?

R Programming

x <- c(2, 4, 6)
mean(x)

A [1] 2

B [1] 12

C [1] 6

D [1] 4

💡 Hint

Recall that mean calculates the average of numbers.

The mean of 2, 4, and 6 is (2+4+6)/3 = 12/3 = 4.

🧠 Conceptual

intermediate

RStudio Project Purpose

What is the main purpose of creating a project in RStudio IDE?

A To run R code faster by compiling it.

B To automatically install all R packages needed for any script.

C To organize files and settings related to a specific analysis or work.

D To share R code directly with other users online.

💡 Hint

Think about how you keep your work tidy and easy to find.

RStudio projects help keep files, scripts, and settings together for one task.

🔧 Debug

advanced

Fix the RStudio Console Error

You run this code in RStudio console and get an error. What is the error message?

R Programming

print('Hello World)

A No error, prints Hello World

B Error: unexpected end of input

C Error: missing closing parenthesis

D Error: object 'Hello World' not found

💡 Hint

Check if all quotes and parentheses are properly closed.

The string is missing the closing quote, causing unexpected end of input error.

📝 Syntax

advanced

Identify the Correct RStudio Script Syntax

Which option shows the correct way to assign the value 10 to variable y in an R script?

A y <- 10

B y =< 10

C y => 10

D y == 10

💡 Hint

Assignment uses a special arrow or equals sign in R.

The correct assignment operator is '<-'. '==' is for comparison, others are invalid.

🚀 Application

expert

RStudio Environment Behavior

After running this code in RStudio, what will be the value of variable z in the global environment?

R Programming

z <- 5
{
  z <- 10
}
z

A 10

B 5

C NULL

D Error: object 'z' not found

💡 Hint

In R, braces {} group statements but do not create a new environment scope like functions do.

Braces {} do not create a new scope in R; the assignment z <- 10 affects the global environment, so z is 10.