I want to take the real estate test but I want to know if real estate agent need good credit. Im in Virginia by the way.

Thank you
When I was in real estate (20 years, now retired) my credit was checked by all of the three brokers I worked with over the years. I had to provide a copy of my car insurance, with the real estate company listed as co-insured, to make sure that I had adequate (high) coverage. My errors and omissions coverage was expensive, even though I never had a claim against me. It is not cheap to go into this business, so you must be committed to work hard for long hours to get started.
Not more than any other person (i.e. good credit is better than bad credit). However, an agent typically works underneath a Broker (the next, higher level of license). As a Broker, sometimes good credit is necessary to develop business relationships with banks, etc.
A careful brokerage may check the credit report of potential agents.
Not unless you are buying a house. When I was an agent in NY credit had nothing to do with it.