MD847202 Fundamental of R Programming

What is the function of the `library()` command in R?

• It is used to load and attach packages in R.
• It is used to create new variables in R.
• It is used to plot graphs in R.
• It is used to execute loops in R.

What does the command `save.image("workspace.RData")` do?

• Saves all installed packages to a file

• Saves the current script to a file

• Saves the current workspace (all variables) to a file

• Saves all plots in the workspace to a file

What is the primary purpose of the R programming language?

• Web Development

• Statistical Computing and Graphics

• Mobile App Development

• Game Development

What does the function `getwd()` do in R?

• Gets the current working directory

• Sets the working directory

• Lists all files in the working directory

• Deletes the current working directory

Which of the following commands is used to install a package in R?

• install.packages("package_name")

• load.package("package_name")

• import.package("package_name")

• package.install("package_name")

Which of the following is a good practice for naming variables in R?

• Using spaces in variable names

• Using descriptive and meaningful names

• Starting variable names with a number

• Using special characters like `@` or `#`

How do you save an R script in RStudio?

• File -> Save As

• Tools -> Save Script

• File -> Export Script

• Script -> Save

Which package repository is used for bioinformatics and genomics analysis in R?

• ggplot2

• dplyr

• Bioconductor

• CRAN

In RStudio, which pane displays the variables currently loaded in the workspace?

• Source Pane

• Console Pane

• Environment Pane

• Files Pane

Which of the following commands will display a fun message using the `cowsay` package?

• say("Hello, R!", by="cow")

• print("Hello, R!")

• message("Hello, R!")

• cat("Hello, R!")