Which signal is missing from the following command that is commonly used to instruct a daemon to reinitialize itself, including reading configuration files?

Which of the following partition types is used for Linux swap spaces when partitioning hard disk drives?

Which of the following vi commands deletes two lines, the current and the following line?

Which of the following apt-get subcommands installs the newest versions of all currently installed packages?

Which Debian package management tool asks the configuration questions for a specific already installed package just as if the package were being installed for the first time?
(Specify ONLY the command without any path or parameters.)