Does everyone's test get invalidated if one person cheats on an ap exam??
ap scores do help, but they're taken as a massive deal when they're really not. I opted out of taking 3 AP tests my senior year because I didn't feel like studying and the tests wouldn't have opted me out of any classes anyway. They're good if you do well and can get out of taking some minor college classes (apush is a decent example actually). most majors will require you to take course specific classes regardless if AP credits can help you get out of them
depends, it's up to collegeboard whether to invalidate the entire testing room or not. they'll "determine" if the cheating affected other students or not from the explanation that the proctor gives. from what I've heard in the last few years, there are very few full groups that all get yeeted. good luck!