Question about scanning negatives

My mom has a bunch of negatives from her dad that she wants to see what is on them.
I noticed that some printer/scanners have the capability of scanning negatives. My questions are: a)when you scan the negative, does it invert the picture so you can see the "positive" image? B)do you have to do one at a time or can you do strips at a time?
Thanks for your help!

[Hack&Lube]

You can see everything at once, if your printer won't do it, almost any photo software, even free web based ones will under an "invert" function.

[tete]

It depends on your scanner if you can do more than one at a time - any time I've scanned negs I've used a very expensive scanner with strong negative scanning capabilities and could do six or 8 strips of negs at a time - the software of the scanner would change them to positives and separate out each individual photo. I think most negative scanners would let you do at least a strip of negs at once, so four or five images (five? I can't remember now) at a time.