You do not receive a score right away on the English Comp Modular exam. It takes 3-4 weeks to receive your score by snail-mail. My son took this CLEP accidentally - by surprise - cold -(long story) and scored a 64. A couple of years ago, he scored over 700 on the reading and writing portions of the SAT, but he hadn't had much timed-writing practice since then. He said this test reminded him of the SAT. There are two essays. According to the College Board, "The College Board arranges for college English professors to grade the essays written for the College Composition exam." It would be worth buying the REA CLEP prep books and doing some practice essays beforehand, especially since you need a 68. See this link for info about scoring: http://professionals.collegeboard.co...Guidelines.pdf
A&I Lit is doesn't require much prep if you're a strong reader. Review literary terms before taking this, and you'll do fine. When you submit your test, you'll see your score immediately. If you are not a strong reader, time might be an issue. It might be reassuring to buy the REA CLEP prep book and take some practice tests first. Since you need a 65, I'd recommend getting 70+ on the REA practice tests before taking the exam.