Most confusion at the start comes from two things: not knowing where you are, and not knowing what a listing is telling you. These questions cover both.
Each one is marked as you go, and the explanation arrives straight after, which is
the part worth reading.
4 questions, marked as you go.
Tasks
These need your own device. Run the command in Termux, then paste what it printed.
The marking looks at what the output means, so spacing, version numbers and
ordering do not matter. If you have not installed anything yet, the
lesson covers the setup.
Read a long listing
A long listing of everything in your home directory, hidden files included. Read the first column of each row as well as the names.
Run this in Termux
On your own device. Nothing on this page executes it. The command runs in
your terminal, and this box only reads what you paste back.
ls -la ~
The first line of the output is a summary rather than a file, so do not try to read it as one.
the listing opens with a total line
each entry starts with a type and a permission string
the owner, group and size columns are present
What a good answer looks like
The first line begins with the word total and gives the disk blocks used by the entries. Every line after that is one file or directory, and they all have the same shape: a ten-character type and permission string, a link count, an owner, a group, a size, a date, and finally the name. Two entries near the top will be a single dot and a double dot, which stand for this directory and its parent. If you cannot see them, you did not pass -a.
Marking your own work
Both halves of this are checked in your browser, with no server involved, so nothing
stops you from pasting output you did not run. The tasks are written so that the
easiest way to pass one is to actually do it and read the result, which is the whole
intention.