Monitoring and optimization in Azure exams often test your ability to choose the right tool for visibility and the right strategy for cost/performance tuning. Many candidates confuse overlapping services (Monitor vs Sentinel vs App Insights) or forget to align cost optimization to workload type.
This capsule summarizes pitfalls, best practices, and exam strategies.
Common Pitfalls
1. Confusing Monitoring Services
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Azure Monitor = umbrella for metrics/logs.
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Log Analytics = query engine (KQL).
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App Insights = application monitoring.
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Sentinel = SIEM (security-focused).
Exam Trap: If question mentions “monitor app dependencies” → App Insights, not Log Analytics.
2. Ignoring Alerts & Automation
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Many candidates forget that alerts can trigger automation (Logic Apps, Runbooks).
Exam Trap: If requirement says “auto-restart VM when unresponsive” → Alert + Runbook, not just Monitor.
3. Mismanaging Cost Optimization
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Forgetting Reserved Instances for long-term workloads.
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Choosing Spot VMs for mission-critical apps (wrong, Spot VMs can be evicted).
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Not applying Hybrid Benefit for Windows/SQL licenses.
4. Overlooking Storage & Performance Tiering
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Using Premium SSDs for archive data (expensive mistake).
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Not using Redis Cache/CDN for high-latency apps.
5. Alert Fatigue
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Too many alerts = ignored alerts.
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Best practice = tune thresholds + group alerts into action groups.
Best Practices
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Always centralize logs in Log Analytics.
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Use workbooks and dashboards for visibility.
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Set budgets in Cost Management to track spend.
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Combine Advisor + Monitor + Automation for proactive optimization.
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Align optimization to business workload criticality (Prod vs Dev/Test).
Quick Recall Table
| Requirement | Best Solution |
|---|---|
| App-level monitoring | Application Insights |
| Query logs & analyze failures | Log Analytics + KQL |
| Detect security incidents | Sentinel |
| Near real-time CPU/memory metrics | Azure Monitor Metrics |
| Auto-remediation of alerts | Logic App / Runbook |
| Long-term predictable workloads | Reserved Instances + Hybrid Benefit |
| Batch jobs with no SLA | Spot VMs |
| Improve DB query performance | Redis Cache + SQL Advisor |
| Optimize costs automatically | Azure Advisor |
Exam Tips
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“Which tool provides dependency maps for apps?” → Application Insights.
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“Which feature triggers auto-remediation?” → Alerts + Runbooks/Logic Apps.
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“Which Azure option is cheapest for dev/test workloads?” → Spot VMs.
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“Which service provides cost-saving recommendations?” → Azure Advisor.
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“Which Azure option saves cost by reusing licenses?” → Hybrid Benefit.
What to Expect in the Exam
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Direct Q: “Which Azure service queries logs with KQL?” → Log Analytics.
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Scenario Q: “Company requires SQL query acceleration with caching.” → Redis Cache.
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Scenario Q: “Company must cut costs for stable, long-running VMs.” → Reserved Instances.
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Scenario Q: “Company wants app dependency tracking.” → Application Insights.
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Trick Q: “Spot VMs are recommended for mission-critical workloads.” → False.