Greek Yogurt

Do greek yogurts (thinking specifically Plain greek yogurt from Fage) need special pesach heksher?

nuts

Is it ok to purchase nuts that are roasted and salted that are kosher year round on pesach without a kosher lepesach certification? For example, can I purchase Trader joes roasted almonds that are salted? Ingredients are Almonds, and Salt. Also, is it ok to assume an...