It's nice to see someone learning, and to say so. Some people try to get homework done by subterfuge.
How would you view only the .com files in the C:\windows\system32 directory?
dir "C:\windows\system32\*.com" /b /a-d
The /b is optional (which returns only the brief names) and so is the /a-d (which is designed to eliminate any folders that end in .com)
Try the command to see how it looks with and without the /b in it. The /a-d is unlikely to make a difference in this case, but you can add /p to make it pause on every screen full.
How would you copy all the .com files in the C:\windows\system32 directory to a directory named JUNK?
copy "C:\windows\system32\*.com" "c:\junk"
This assumes you have permissions to create a JUNK folder in the root of c: (and that it already exists)