Free R Programming Language Trivia Questions and Answers

Question 1

Which of the following represents the R language's base package?

Accepted Answer

tools

Answer

The `tools` package is a fundamental component of the R language's base distribution. It provides a collection of utilities primarily focused on package development, checking, and maintenance. While `base` is the core package, `tools` specifically offers functionalities that support the infrastructure and development aspects of R.

Question 2

R includes a _______ to assist you in performance and code optimization.

Accepted Answer

Debugger

Answer

R includes a debugger, which is an essential tool for identifying and fixing errors in code, as well as for understanding code execution flow. The debugger allows users to step through their code line by line, inspect the values of variables at different points, and trace function calls. This capability is crucial for effective troubleshooting and optimizing code performance.

Question 3

A function is marked for _____ mode in R mode using Debug().

Accepted Answer

run

Answer

When the `debug()` function is used on an R function, it marks that function to enter debug mode the next time it is called. This means that upon its subsequent execution (or 'run'), the function will suspend at its beginning, allowing the user to interactively step through the code and inspect its state. Thus, it's marked to 'run' in a debug-enabled state.

Question 4

Whenever a function is called, ___ suspends execution and switches the part into debug mode.

Accepted Answer

Both of the above

Answer

Both `browser()` and `recover()` are powerful debugging tools in R. `browser()` suspends execution at the point it's called within a function, opening an interactive debugging environment. `recover()` is typically used in error handling to allow the user to browse the call stack after an error has occurred, effectively suspending execution at the point of the error and enabling investigation.

Question 5

A matrix is a rectangular data collection with ____ dimensions.

Accepted Answer

2

Answer

A matrix in R is a fundamental data structure designed for storing data in a rectangular format. It is inherently two-dimensional, consisting of rows and columns. All elements within a matrix must be of the same data type, making it suitable for numerical operations and statistical analysis.

R Programming Language Certification Practice Test

R Programming Language Certification Practice Test

Free R Programming Language Trivia Questions and Answers