No. You may be able to find a list of symptoms online, but you should really get a home pregnancy test. If you cannot afford one, usually, crisis pregnancy centers offer them for free.
This sounds like a scam to me. I'll bet it just asks you about popular pregnancy symptoms. If you think you're pregnant, take a test from a drug store.
Because there is no way for an online pregnancy test to measure hormone levels in your blood or urine, the only way it could work is by filling out a symptom questionnaire. You can now purchase effective hormone tests at dollar stores.
Online pregnancy tests can not tell you if you really are pregnant or not. If you skip a period or it gets really light/spotting, but a home pregnancy test.