Do cron jobs run non-interactive, non-login shells? [closed]

Question

Say I create a cron job that runs a Zsh or Bash script as /path/to/shell_script.sh

Would such a shell be a non-interactive non-login shell? If so, what shell init files would be executed (for Bash & Zsh)?

Answer 1

zsh sources .zshenv (source).

bash sources $BASH_ENV if set. (source)