Final answer:
The -NoClobber parameter prevents Export-CSV from overwriting files, while the -Confirm parameter prompts for confirmation before proceeding.
Step-by-step explanation:
To prevent the Export-CSV command in PowerShell from automatically overwriting an existing file, you use the -NoClobber parameter. This parameter stops the command from overwriting existing files. On the other hand, if you want PowerShell to ask for confirmation before writing the output file, you would use the -Confirm parameter. With the -Confirm parameter, PowerShell prompts you for confirmation before executing the command, which helps to prevent accidental file overwrites.
The parameter that would prevent an Export-CSV command from automatically overwriting an existing file is the -NoClobber parameter. This parameter ensures that if the output file already exists, the command will not overwrite it.
The parameter that would ask whether you were sure before proceeding to write the output file is the -Confirm parameter. When this parameter is used, the command will prompt you to confirm before writing the output file.