BSCS 4-3 - Midterm Exam (Jan. 6, 2024)

What best describes R in programming?

• A programming language for statistics and data analysis

• A web development language

• An operating system

• A gaming software

Which of the following is the correct sequence for installing R and R Studio?

• Install R first, then R Studio

• Install R Studio first, then R

• Installation order doesn't matter

• Install both simultaneously

What is the purpose of the 'Environment' tab in RStudio?

• To display all installed packages

• To manage files and folders

• To view objects, variables, and their values

• To write and execute code

Which operator is used in R for exponentiation?

• **

• //

• %

• ^

What's the primary purpose of a function in R?

• Plotting graphs

• Storing datasets

• Reusing code and performing specific tasks

• Writing comments in code

Which of the following R code will correctly compute and display output of 45?

• 
• 
• 
• 

In a bakery dataset, the variable 'bread' represents the number of loaves sold, and 'price' is the cost per loaf. The following R code is used: (see the attached image)

What does the variable 'income' represent?

• Total loaves available

• Total expenses

• Average price per loaf sold

• Total revenue generated

In a stock market dataset, 'opening_price' represents the stock's opening price, 'closing_price' denotes the closing price, and 'volume' signifies the total volume of shares traded. See the given attached R code image.

What does 'profit' represent?

• Total profit gained

• Total revenue generated

• Average profit per share

• Total expenses

Which of the following is true for a VECTOR in R?

• It is a homogeneous 1-dimensional data structure

• It is a heterogeneous 1-dimensional data structure

• It is homogeneous 2-dimensional data structure

• It is a heterogeneous 2-dimensional data structure

Which of the following function cannot be used to import a csv file in R?

• read.table()

• read.csv()

• read_excel()

• All of the above