Failed my first PAC attempt back in February with a 61%, which stung pretty bad considering I'd been working in programmatic for about two years. The problem was I went in thinking my day-to-day experience would carry me through, but the exam tests a lot of theoretical stuff around auction mechanics, viewability standards, and brand safety frameworks that I'd never had to think about formally.
For round two I gave myself 8 weeks and averaged about 90 minutes of studying per day. I leaned heavily on the IAB's training materials and drilled practice questions until I was consistently hitting 78-82% on mock exams. The deal-ID and PMP sections tripped me up the first time, so I made sure I really understood the difference between guaranteed and non-guaranteed inventory deals before sitting again.
Scored a 74% on the retake — not flashy but passing is passing. The exam itself has 100 questions and you've got 2 hours, which sounds like plenty of time but I ended up flagging about 20 questions and coming back. If you're on the fence about whether you need more prep, just keep taking practice tests. When you're hitting 75%+ consistently you're probably ready.
One thing I'd warn people about: don't skip the data privacy and compliance section. GDPR, CCPA, and consent management questions made up more of the exam than I expected both times. That section alone probably cost me my first attempt.
The flagging strategy is smart. I burned almost 20 minutes on three questions I should've just flagged immediately and came back to. Finished with 4 minutes left and definitely would've run out of time if I hadn't started flagging more aggressively halfway through.
Second attempt passer here too — that 61% on the first try feels like a gut punch but it's actually really common. A lot of people underestimate how much the exam tests textbook definitions versus real-world intuition. The two don't always line up the way you'd hope.
The auction mechanics questions are brutal if you don't have a solid mental model of how header bidding actually works under the hood. I drew out a flow diagram of the bid request/response cycle and just stared at it every morning for two weeks. Ended up seeing at least 8 questions directly related to that topic.
Congrats on passing! I'm scheduled for mine in 6 weeks and the privacy/compliance section you mentioned is exactly what I've been avoiding. Going to front-load that material starting tonight. Did you find the IAB's official study guide worth the money or is there better free stuff out there?
Just wanted to drop a quick update since I've been lurking this thread for a while. I sat a full practice run last weekend and pulled an 81%, which honestly surprised me because a month ago I was barely hitting 68. The thing that moved the needle for me was actually slowing down on the stuff I thought I already knew. Brand safety was one of those areas I'd been glossing over until I spent a real afternoon on pac/questions/brand safety and ad fraud prevention and realized how much I was missing on the verification side of things.
I'm booked for July 14th. Wasn't planning to go that soon but I feel like the momentum is there right now and I don't want to lose it. Good luck to everyone still grinding, it really does start clicking if you keep at it.
I was in almost the exact same boat — I mean, I'd been running programmatic campaigns for years and still bombed it. The second time around I completely changed my approach and actually drilled down on the stuff I'd been glossing over, especially brand safety and fraud prevention, which I honestly thought I knew but didn't. I spent a lot of time on pac/questions/brand safety and ad fraud prevention practice questions because that's where I was leaking points and it wasn't obvious until I saw the breakdown.
The other thing that actually helped was stopping myself from answering based on what I'd do at my job and instead asking what the "textbook" answer was. Those two things aren't always the same. Good luck, it's definitely passable once you figure out where the gaps are.
Congrats on passing! I had a similar experience where I thought my work experience would be enough and it really wasn't. The thing that finally clicked for me was drilling down on the stuff I kept skipping because it felt boring -- brand safety and fraud prevention especially. I found the pac/questions/brand safety and ad fraud prevention 2 practice set super helpful because it actually explains the reasoning behind each answer, not just what's right.
Honestly that's it. I wasn't doing anything fancy, just going through practice questions on the weak areas instead of reviewing stuff I already knew. If you failed before, look at your score breakdown and attack whatever's lowest first, not whatever feels comfortable.
Congrats on passing! The auction mechanics piece tripped me up on my first attempt too. What finally clicked for me was stopping trying to memorize definitions and instead just working through a ton of practice questions until I actually understood why the wrong answers were wrong. That shift in how I was studying made a bigger difference than any study guide I'd read.
Also don't underestimate the reporting and measurement section. I thought I knew it cold from my day job but the exam frames it differently than you'd expect. Give that area more time than feels necessary and you'll be fine.