Score Review and Weak-Area Remediation

After completing all three mock exam sections, your score analysis should begin by calculating your percentage correct in each domain separately — not just overall. An 80% overall score that hides a 60% in security and governance still represents exam risk, because that domain accounts for 30–35% of the real exam. Map each missed question to its specific lesson topic and create a focused study list. The goal is not perfect recall of facts but confident reasoning about scenarios.

Common Cloud Concepts weak areas and remediation:

• Confused Elasticity vs. Scalability → Elasticity = automatic; Scalability = ability. Revisit 'Key Cloud Benefits and Economies of Scale'.
• Shared Responsibility misapplied to SaaS → Draw the responsibility table by hand for all three service models.
• Confused CapEx and OpEx → CapEx = upfront purchase; OpEx = monthly bill. Revisit 'Cloud vs. Traditional On-Premises'.

Common Architecture and Services weak areas:

• Confused Availability Sets vs. Zones → Sets = fault/update domains within one data centre; Zones = separate data centres within one region.
• Wrong database service → Memorise: Cosmos DB = globally distributed NoSQL; Azure SQL = relational PaaS; SQL MI = near-100% SQL Server compat.
• Confused Queue Storage vs. Service Bus → Queue Storage = simple cheap 64 KB; Service Bus = enterprise topics sessions DLQ 100 MB Premium.
• Misidentified compute service → Map each service to its IaaS/PaaS tag and primary use case.

Common Security and Governance weak areas:

• Confused Defender for Cloud vs. Sentinel → Defender = posture/score; Sentinel = SIEM/SOAR threat detection.
• Wrong cost tool → Before deployment: Pricing Calculator; After deployment: Cost Management; Migration business case: TCO Calculator.
• Wrong composite SLA formula → AND = multiply (result lower); OR = 1−(1−SLA1)×(1−SLA2) (result higher).
• Confused Policy vs. Locks → Policy = control resource properties; Locks = prevent deletion or modification of existing resources.

With your weak areas identified, create a focused study plan for the remaining days before your exam:

• 7+ days out: Re-read the full lesson for each weak area; complete Microsoft Learn knowledge checks for those modules.
• 3–6 days out: Take two full Microsoft official practice assessments (100 questions total); identify any new weak areas.
• 1–2 days out: Rapid-fire revision of service names, SLA percentages, pricing tool names, and shared responsibility boundaries.
• Exam day: Review your weak-area cheat sheet 30 minutes before the exam; do not cram new material.

These 10 facts are worth memorising as flashcards for AZ-900:

• Single VM + Premium SSD SLA: 99.9%
• Availability Set SLA: 99.95%
• Availability Zone SLA: 99.99%
• Reserved Instance max discount: 72%
• Spot VM max discount: 90%
• AZ-900 passing score: 700/1000
• Max tags per resource: 50
• Max management group depth: 6 levels below root
• Security posture score service: Defender for Cloud
• Pre-deployment cost estimate tool: Pricing Calculator

Answer in your head before reading on:

• Which model: customer manages OS, Azure manages hardware? → IaaS
• Which benefit: deploy to Tokyo, London, São Paulo? → Geo-Distribution
• Which deployment: on-premises + Azure connected? → Hybrid Cloud
• CapEx or OpEx: monthly Azure subscription? → OpEx
• Who manages data in SaaS? → Customer

Security and governance recall drill — answer before reading on:

• Prevent VM deletion? → CanNotDelete Resource Lock
• Enforce required tag on all resources? → Azure Policy (Deny effect)
• View security score? → Defender for Cloud
• Detect threats from logs? → Microsoft Sentinel
• Store database password securely? → Azure Key Vault Secret
• External partners sign in with their own credentials? → Entra ID B2B

Cost and SLA drill — answer before reading on:

• Best discount for VM running 24/7 for 3 years? → 3-year Reserved VM Instance (up to 72%)
• Estimate cost before deploying? → Azure Pricing Calculator
• Monitor spending after deployment? → Azure Cost Management
• Compare on-premises vs. Azure cost? → TCO Calculator
• App Service (99.95%) + SQL DB (99.99%) composite SLA? → ≈ 99.94%
• Reuse Windows Server licences on Azure? → Azure Hybrid Benefit

Before booking your exam, you should be able to confidently answer:

• What does IaaS / PaaS / SaaS mean in a scenario context?
• Which Azure service solves each common problem (storage, compute, DB, security, governance, cost)?
• How does the shared responsibility model change across IaaS, PaaS, SaaS?
• How do you calculate composite SLA?
• What are the three Azure cost tools and when is each used?

If you pass: celebrate and immediately look at next certifications — AZ-104 (Administrator), AZ-204 (Developer), or AZ-305 (Solutions Architect Expert) build directly on AZ-900 foundations. If you do not pass: Microsoft requires a 24-hour waiting period before a retake. Review your score report which shows your domain percentages — study only your weak domains, not the whole curriculum, to pass efficiently on the next attempt. Most candidates who miss by a small margin (680–695) pass on the second attempt after 1–2 weeks of targeted revision.

Test your understanding of Microsoft Azure Fundamentals (AZ-900) concepts from this lesson.

In this final lesson you learned: score analysis by domain identifies weak areas more effectively than overall score alone, 10 high-value flashcard facts (SLAs, discounts, passing score, tool names) are the highest-ROI memorisation before exam day, and 85%+ on official practice assessments builds the margin to pass comfortably. Congratulations on completing the full AZ-900 course track — you are now prepared to sit the Microsoft Azure Fundamentals exam!