I just passed my first CLEP, Information System and Computer Application. I used all 90 min. to answer all 100 questions. I find the test very hard and the multiply choice are confusing. I studied IC questions several times and practiced with practice test from AP Courseware Information Applications CD. This also has full study material as well.
Amazon.com: CLEP / AP Courseware - Information Systems & Computer Applications: Perfect Score Software, Inc.: Books
I don't think IC is enough and some of the questions in IC are unnecessary because they are outdated.
Information system and Computer Application---57