CertStack

Practice questions, real explanations, and progress that follows you — 100% free, no charge to take any quiz.

Exam content sourced from official providers

Microsoft
AWS
CompTIA
Databricks
ISC2
Microsoft
AWS
CompTIA
Databricks
ISC2
Microsoft
AWS
CompTIA
Databricks
ISC2
Microsoft
AWS
CompTIA
Databricks
ISC2
Microsoft
AWS
CompTIA
Databricks
ISC2
Microsoft
AWS
CompTIA
Databricks
ISC2

How it works

Built like a real course, not a flashcard deck

CertStack pairs a scraped-and-verified question bank with a teaching layer and server-tracked progress, so practicing here looks a lot like the exam itself.

Question 12 of 40

A retail company wants costs to rise during a seasonal sale and fall afterward. Which pricing model fits?

Consumption-based pricing
Capital expense purchasing
Fixed capacity planning

Step 1 — Practice

Real exam formats, not just flashcards

Every question is written against the official Microsoft Learn study guide for the exam, then generated into one of four interactive formats you'll actually see on test day: scenario multiple-choice, yes/no evaluation matrices, inline dropdown completion, and drag-and-drop matching.

  • Sourced from the current AZ-900 skills-measured outline
  • Weighted by exam domain, so harder domains show up more often

Consumption Pricing vs. Capital Expense

Cloud computing commonly uses a consumption-based model, letting spend follow actual usage. Seasonal demand and elastic cost are strong signals for this pattern on the exam.

CORRECTSpending follows actual resource usage.
TRAPFits owned hardware, not elastic cloud spend.

Step 2 — Understand

Every answer comes with a full teaching block

Getting a question right or wrong is only half the loop. Each question expands into a mini-lesson: why the correct option matches the scenario, why each distractor is a plausible trap, the exact trigger phrases the real exam uses, and a comparison table when two services are easy to confuse.

  • Option-by-option breakdown for every choice, not just the right one
  • Links back to the official Microsoft Learn documentation
Level 4Specialist

65 / 100 XP to next level

12

streak

340

total XP

Step 3 — Track

Progress that's actually saved, not just a local cookie

Answer as a guest and your progress stays on that device. Create an account and it's written to the same SQL database the platform runs on — XP, streaks, and every answered question — so closing the tab, switching devices, or logging in a week later picks up exactly where you left off.

  • XP and streak bonuses for consecutive correct answers
  • Per-domain accuracy, so you know which domain needs more work