The Submit Files Activity allows learners to submit one or more files to the LAMS server for review by a teacher. The teacher can then input grades into the system based on these files, which can then be viewed by the learners.
Not much to add here, it's a basic Multiple Choice activity. It can be configured how you want, either in true/false or multiple answer mode.
The older cousin of both 'Multiple Choice' and 'Q&A', Assessment allows sequence authors to create a series of questions with a high degree flexibility in total weighting.
This is a more 'formal' type of assessment, as you an assign custom grades and a time limit.