A+ Certification exams are available online from a few vendors.
The online exams are a good alternative to off-line (download and use) exams when you have Internet connectivity, and mobile. You can access the online tests from anywhere provided that there exists Internet connectivity.
Online exam vendors provide several features for self evaluation including the following:
1. Timed tests with several question types, similar to actual exam,
2. Categorized scoring for identifying weak areas
3. Saving and recalling exam results among others.