How to find out which package version is loaded in R?

You can directly query a specific package’s installed version:

packageVersion("dplyr")

This usually reflects the same version that is currently loaded, unless multiple versions are installed and you specifically loaded a different one.

Using sessionInfo()

Running sessionInfo() shows a breakdown of all packages actively loaded (under “other attached packages” or “loaded via a namespace”). This confirms the exact version running in your current R session.

Using installed.packages()

installed.packages() lists every package and version available in your R library, though it doesn’t tell you which version is actively loaded in your session if multiple versions exist.

Next Steps for Interview Prep and Beyond

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