Question
You have a Docker host.
You need to create a Windows Server container image that will include an installation of Python.
How should you complete the Dockerfile? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Dockerfile:
[Selection 1: parser directive]
FROM mcr.microsoft.com/windows/servercore:ltsc2025
RUN powershell.exe -Command wget https://www.python.org/ftp/python/3.10.16/python-3.10.16.exe; [Selection 2]
Start-Process c:\python-3.10.16.exe -ArgumentList '/quiet InstallAllUsers=1 PrependPath=1' -Wait
Explanation
Parser directive line (before FROM): # escape=` — The escape parser directive changes the character Docker treats as the escape and line-continuation character, and it must appear at the very top of the Dockerfile, before FROM. Windows Dockerfiles commonly switch it to the backtick because the default escape character, the backslash, is also the Windows path separator, so paths such as c:\python-3.10.16.exe could otherwise be misread. # syntax= selects a BuildKit frontend and # check= configures build checks; neither changes the escape character.
Line-continuation character at the end of the first RUN line: ` — After the directive sets the escape character to the backtick, that character continues the RUN instruction onto the next line, so the download and the silent Start-Process install of python-3.10.16.exe run as one instruction. The backslash no longer has that role once the directive has reassigned it, and the forward slash has no line-continuation meaning in a Dockerfile.
