What Is AZ-305?
The Azure Solutions Architect Expert is Microsoft's highest-level architecture certification, awarded to professionals who pass the AZ-305: Designing Microsoft Azure Infrastructure Solutions exam while holding the AZ-104 (Azure Administrator Associate) prerequisite. It validates your ability to design cloud and hybrid solutions that meet functional, security, performance, and cost requirements.
Unlike implementation-focused certifications, AZ-305 tests architectural decision-making — choosing the right Azure services, designing for scalability and resilience, and making trade-offs between competing requirements. You need to understand not just individual services but how they integrate together to form complete solutions.
The certification is consistently ranked among the top 5 highest-paying IT certifications globally, with holders commanding median salaries of $155,000+ USD in the United States. Microsoft's unique free annual renewal model (via online assessment) makes it one of the most cost-effective certifications to maintain long-term.
Key Facts
Official Site
- Questions: 40–60
- Duration: 120 minutes
- Validity: 1 year (free renewal)
- Study: Free on Microsoft Learn
- Testing: Pearson VUE worldwide
- Remote: Online proctoring available
- Prerequisites: AZ-104 or equivalent exp.
- Pass score: 700 / 1000
- Renewal: Free annual online assessment
- Cost: ~$165 USD
- Purpose: Azure Solutions Architect Expert
- Registrations/year: ~150,000+
- Languages: Multiple including English, Japanese
Source: Microsoft Learn
Key Facts & Statistics
AZ-305 by the Numbers:
- Exam code: AZ-305 (Designing Microsoft Azure Infrastructure Solutions)
- Questions: 40–60 (varies per exam instance)
- Duration: 120 minutes (2 hours)
- Passing score: 700 out of 1000 (scaled scoring)
- Cost: $165 USD per attempt
- Pass rate: ~35–40% (estimated — Microsoft does not publish official rates)
- Prerequisite: Must hold AZ-104 (Azure Administrator Associate) certification
- Validity: 1 year — renewable free via online assessment on Microsoft Learn
- Free renewal: Annual online assessment (open-book, no time limit, unlimited retakes)
- Median salary (US): $155,000+ (among top 5 highest-paying IT certs)
- Free training: Complete learning paths on Microsoft Learn (no cost)
- Sandbox environments: Free Azure sandbox labs within Microsoft Learn modules
- Case studies: 1–3 case studies per exam (multi-question scenarios)
- Experience recommended: 2+ years designing Azure solutions in production
- Services covered: 40+ Azure services in depth, awareness of 100+
Exam Format & Domains
Azure Certification Path — Solutions Architect Track
flowchart TD
A["AZ-900
Azure Fundamentals
Optional — 45 min"] --> B["AZ-104
Azure Administrator Associate
40-60 Qs — 120 min
REQUIRED PREREQUISITE"]
B --> C["AZ-305
Azure Solutions Architect Expert
40-60 Qs — 120 min"]
A --> D["Other Associate Paths
AZ-204 Developer
DP-300 Database"]
B --> E["Other Expert Paths
DevOps Engineer Expert
AZ-400"]
style A fill:#3B9797,color:#fff
style B fill:#16476A,color:#fff
style C fill:#BF092F,color:#fff
style E fill:#132440,color:#fff
Domain Breakdown
| Domain | Weight | Key Topics |
|---|---|---|
| 1. Design Identity, Governance & Monitoring | 25–30% | Azure AD (Entra ID), RBAC, conditional access, Azure Policy, Management Groups, Monitor, Log Analytics, cost management |
| 2. Design Data Storage Solutions | 25–30% | Storage accounts, Cosmos DB, SQL Database, Data Lake, redundancy options (LRS/ZRS/GRS/GZRS), access tiers, data migration |
| 3. Design Business Continuity | 10–15% | Azure Site Recovery, Azure Backup, availability zones, availability sets, geo-redundancy, RPO/RTO, disaster recovery patterns |
| 4. Design Infrastructure Solutions | 25–30% | VNets, NSGs, load balancers, Application Gateway, VPN/ExpressRoute, App Service, AKS, container instances, compute selection |
Question Types
| Type | Format | Notes |
|---|---|---|
| Multiple Choice | 1 correct answer from 4 options | Most common type |
| Multiple Response | 2–3 correct from 5–6 options | Explicitly states how many to select |
| Drag-and-Drop | Match items or arrange in sequence | Common for process ordering |
| Case Studies | Multi-page scenario with 4–7 questions | Cannot go back once you leave case study section |
| Hot Area | Click correct area on a diagram/table | Tests visual understanding of architecture |
| Build List | Arrange steps in correct order | Tests understanding of process sequences |
Case Study Warning: Case studies present a lengthy scenario (1–3 pages of requirements, constraints, existing infrastructure) followed by 4–7 questions. Key rules: (1) You CANNOT go back to the case study section once you click "Next Section" — answer all case study questions before moving on. (2) Case studies are time-intensive — budget 20–30 minutes for each. (3) Read the requirements tabs carefully — answers are often hidden in the "Technical Requirements" or "Business Requirements" tabs that candidates skip.
Prerequisites & Pathway
Certification Pathway: Unlike AWS SA Professional (which has no mandatory prerequisites), Azure Solutions Architect Expert requires you to hold AZ-104 (Azure Administrator Associate) before or concurrently. This ensures all AZ-305 candidates have verified hands-on Azure administration skills. The typical pathway:
- Step 1: Pass AZ-900 (Azure Fundamentals) — optional but recommended for newcomers (~$99)
- Step 2: Pass AZ-104 (Azure Administrator Associate) — required prerequisite (~$165)
- Step 3: Pass AZ-305 (Designing Azure Infrastructure Solutions) — architect exam (~$165)
- Result: Azure Solutions Architect Expert designation granted (valid 1 year, renewable free)
- Total cost: ~$330 minimum (AZ-104 + AZ-305) or ~$429 with AZ-900
| Exam | Level | Questions | Duration | Focus |
|---|---|---|---|---|
| AZ-900 | Fundamentals | 40–60 | 45 min | Cloud concepts, Azure services overview, pricing |
| AZ-104 | Associate (Required) | 40–60 | 120 min | Implementation: VMs, networking, storage, identity, monitoring |
| AZ-305 | Expert | 40–60 | 120 min | Design: architecture decisions, trade-offs, best practices |
Azure Solutions Architect Expert vs AWS SA Professional
| Factor | Azure Solutions Architect Expert | AWS SA Professional |
|---|---|---|
| Exam(s) required | AZ-104 + AZ-305 (2 exams) | SAP-C02 (1 exam, no prerequisite) |
| Total exam time | 240 min (120 + 120) | 180 min (single sitting) |
| Total cost | $330 (2 × $165) | $300 (single exam) |
| Pass mark | 700/1000 (both exams) | 750/1000 |
| Validity | 1 year (renewable free) | 3 years (must retake or pass another) |
| Renewal cost | $0 (free online assessment) | $300 (retake exam) or $150 (specialty) |
| Case studies | Yes (1–3 per exam) | No (long scenarios but not multi-page) |
| Difficulty | ★★★★☆ | ★★★★★ |
| Hands-on labs in exam | No (but sandbox labs in training) | No |
| Free training | Yes (Microsoft Learn — complete paths) | Limited (AWS Skill Builder free tier) |
| Market position | #2 cloud (25% share, fastest growing) | #1 cloud (31% share) |
| Enterprise focus | Strong (Microsoft 365/hybrid integration) | Strong (widest service catalog) |
Verdict: Azure Solutions Architect Expert is more accessible (lower pass mark, free renewal, free training materials) but requires two exams. AWS SA Professional is harder (higher pass mark, longer exam, costlier renewal) but achievable in a single sitting. For enterprise environments with Microsoft 365 and Active Directory, Azure expertise is often more relevant. For startups and cloud-native companies, AWS remains dominant. Many senior architects hold both certifications.
Tips & Exam Strategy
Critical Tips for AZ-305 Success:
- Think in terms of Well-Architected Framework pillars: Every design question has a "best" answer that aligns with Microsoft's 5 WAF pillars: Reliability, Security, Cost Optimisation, Operational Excellence, and Performance Efficiency. When stuck between two options, choose the one that best satisfies the stated requirements while maintaining alignment with WAF principles.
- Case studies are time sinks — strategy matters: Case studies cannot be revisited once you leave the section. Read all tabs (Overview, Technical Requirements, Business Requirements, Current Architecture) before answering any questions. Budget 20–30 minutes per case study. Many candidates run out of time because they spend too long on cases.
- Know WHEN to use each service, not just WHAT they do: AZ-305 rarely asks "what is Azure Cosmos DB?" — it asks "given these requirements (global distribution, multi-model, strong consistency needed), which database service should you recommend?" The differentiator is understanding service selection criteria and trade-offs.
- Practice with Microsoft Learn sandbox environments: Microsoft Learn provides free Azure sandbox environments where you can deploy and experiment without an Azure subscription. Use these extensively — hands-on experience with actual portal/CLI workflows is invaluable for understanding service capabilities and limitations.
- Master the Azure identity and governance landscape: Domain 1 (25–30%) focuses heavily on Entra ID (formerly Azure AD), RBAC, Conditional Access, Privileged Identity Management, Management Groups, Azure Policy, and Blueprints. This is often the weakest area for candidates who come from pure infrastructure backgrounds. Study identity thoroughly.
- Understand redundancy and availability options precisely: Know the exact differences between LRS/ZRS/GRS/RA-GRS/GZRS/RA-GZRS, when to use Availability Sets vs Availability Zones, SLA implications of each choice, and how to design for specific RPO/RTO targets. These distinctions appear frequently.
- Use the official Microsoft Learn paths as your primary study material: Microsoft provides comprehensive, free learning paths for AZ-305. Unlike many certifications where official materials are insufficient, Microsoft Learn content is actually excellent for AZ-305 preparation. Supplement with John Savill's YouTube channel for visual architecture explanations.
- Don't neglect cost optimisation: Many questions include cost constraints. Know reserved instances vs pay-as-you-go trade-offs, right-sizing strategies, Azure Advisor recommendations, and when to use different compute options (VMs vs App Service vs Functions vs AKS) from a cost perspective.
Common Pitfalls:
- Confusing AZ-104 (how) with AZ-305 (what/why): AZ-104 asks "how do you configure a VNet peering?" — AZ-305 asks "should you use VNet peering, VPN Gateway, or ExpressRoute given these requirements?" The mindset shift from implementation to design is the biggest challenge for AZ-104 holders.
- Overthinking case studies: Case study questions often have straightforward answers hidden in the requirements. Don't overthink — the answer is usually stated (or contradicted) in one of the requirement tabs. Read carefully before theorising.
- Ignoring the renewal model: AZ-305 is valid for only 1 year (not 3 like AWS). However, renewal is free — just pass an online assessment on Microsoft Learn within 6 months of expiry. Set a calendar reminder 3 months before expiry to avoid accidentally lapsing.
- Under-preparing for hybrid scenarios: Many questions involve hybrid architectures (on-premises + Azure). Know Azure Arc, ExpressRoute vs Site-to-Site VPN trade-offs, Azure AD Connect, and hybrid identity scenarios thoroughly.
Syllabus Progress Tracker
Track your preparation topic-by-topic. Progress is auto-saved and exportable.