A phase-by-phase cadence for full-length mock exams — from one baseline test to a weekly rhythm near exam day — and the signs you are testing too often.
Short answer: roughly one full-length mock every two weeks in the early and middle phases of your prep, tightening to one per week in the final month — with the last one sitting a few days before exam day, not the night before. For a typical 8–12-week certification prep, that lands at four to seven full mocks in total.
That cadence is a starting point, not a law. The right frequency depends on where you are in your prep, because a full-length mock does a different job in week two than it does in the final week. This article deals only with the cadence question — how often, at each phase. What to do with each mock's results is covered in how to analyse your mock exam results, and the room-setup side of a dress rehearsal belongs to simulating real exam conditions at home.
Practice testing is the best-supported study technique in the learning-science literature — Dunlosky and colleagues' 2013 review rated it among the highest-utility methods, well ahead of rereading. So why not sit a mock every day?
Because a full-length mock is expensive. A 90-question exam such as CompTIA Security+ (SY0-701) runs 90 minutes; an AWS Solutions Architect – Associate mock modelled on the real SAA-C03 runs 130 minutes for 65 questions. Add a proper review — which should take at least as long as the sitting — and each mock consumes a half-day. Sit them daily and three things go wrong:
The spacing research points the same way: distributed practice reliably beats massed practice (Cepeda et al., 2006). Spaced-out mocks with study between them are worth more than the same number crammed together.
Take exactly one full-length mock at the very beginning, before serious study. Expect a rough score; that is the point — it maps the terrain and gives every later mock something to be compared against. The case for this diagnostic sitting, and how to read it without discouragement, is made in should you take a practice test before studying?. Then put full mocks away for a while.
During the weeks when you are working through the objectives, full mocks are progress checks, not the main event. One every two or three weeks is enough — frequent enough to show a trend, spaced enough that real study happens between sittings and each mock has something new to measure. Between them, use short domain quizzes (10–25 questions on one topic) freely; they are cheap, targeted, and do not exhaust your full-length question supply.
A useful discipline: never book the next mock until you have finished acting on the last one. The mock-review-study loop, not the mock itself, is what raises scores.
Once the objectives are covered, shift full mocks to a weekly rhythm, and make them timed. Weekly is frequent enough to build pacing stamina and confirm consistency, while leaving five or six days to patch whatever each mock exposes. This is also the phase where conditions matter most — same time limit, no pauses, no notes — because you are now rehearsing the event, not just sampling questions.
Sit your final full mock three to five days before the real exam, then stop testing at full length. A final-48-hours mock cannot help — there is no time left to fix what it finds — and a wobbly score at that point costs confidence for nothing. Light review and short quizzes fill the last days. The reasoning behind that stopping point gets a fuller treatment in when should you stop taking practice tests?
The phase model assumes an 8–12-week runway. Flex it as follows:
How many mocks you take in total across all phases is a slightly different question from cadence, with its own trade-offs; see how many practice tests you should take before an exam for that count.
Too often: your review of each mock is getting shallower; you recognise questions and score off memory; scores rise on repeated pools but stall on fresh ones; study time between mocks has shrunk below the time the mocks themselves take.
Not enough: you cannot say what your last timed score was; exam pacing still feels alien a fortnight out; a domain has been weak for a month without you noticing; your only evidence of readiness is how confident the textbook feels.
If you need full-length material to run this schedule, ExamPractice's practice-test simulation gives subscribers timed, exam-style sessions across the certifications in its exam directory, which makes a weekly Phase 3 rhythm straightforward to sustain.
Frequency is the easy half of mock-exam strategy. The half that actually raises scores is what happens in the days after each sitting — so once your calendar is marked, make sure every mock is followed by a real analysis session rather than a glance at the percentage.
Exam facts in this guide were checked against official certification-provider pages on . Fees, exam codes and policies change — confirm on the provider’s own site before you book.
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