Cost optimization pillar in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Azure Cost Optimization Principles

Which of the following best describes a key principle of the Azure Cost Optimization pillar?

A Continuously monitor and right-size resources to match actual workload needs.

B Maximize resource usage by running all services at full capacity regardless of demand.

C Purchase the most expensive service tiers to ensure highest performance at all times.

D Avoid using any automation to reduce manual control over costs.

💡 Hint

Think about how to avoid paying for unused or underused resources.

The Cost Optimization pillar emphasizes monitoring and adjusting resources to fit actual needs, avoiding waste.

❓ Architecture

intermediate

Choosing Azure Services for Cost Efficiency

You need to design a solution that stores large amounts of infrequently accessed data with minimal cost. Which Azure service should you choose?

A Azure Blob Storage with Hot access tier

B Azure SQL Database with Premium tier

C Azure Blob Storage with Cool or Archive access tier

D Azure Cosmos DB with multi-region writes enabled

💡 Hint

Consider storage tiers optimized for infrequent access.

Cool and Archive tiers in Azure Blob Storage offer lower costs for infrequently accessed data compared to Hot tier or databases.

❓ Configuration

advanced

Analyzing Azure Cost Management Configuration

Given the following Azure Cost Management alert configuration JSON snippet, what will trigger the alert?

{
  "criteria": {
    "threshold": 500,
    "timeAggregation": "Total",
    "metricName": "Cost",
    "operator": "GreaterThan"
  },
  "windowSize": "P1D"
}

A Alert triggers when daily total cost exceeds $500.

B Alert triggers when hourly cost exceeds $500.

C Alert triggers when monthly total cost exceeds $500.

D Alert triggers when daily average cost is below $500.

💡 Hint

Look at the window size and aggregation method.

The windowSize 'P1D' means one day, and timeAggregation 'Total' means sum over that day. The alert triggers if total daily cost is greater than $500.

❓ security

advanced

Cost Impact of Azure Security Best Practices

Which security practice can help reduce unexpected Azure costs related to compromised resources?

A Disable all monitoring to save costs on logs and alerts.

B Implement Azure Policy to enforce resource tagging and limits.

C Allow unrestricted network access to all resources for ease of use.

D Avoid using role-based access control (RBAC) to simplify management.

💡 Hint

Think about how governance can prevent resource misuse.

Azure Policy helps enforce rules like tagging and resource limits, preventing unauthorized or costly resource creation.

❓ service_behavior

expert

Effect of Azure Reserved Instances on Cost

You purchase a 3-year Azure Reserved Instance (RI) for a virtual machine. Which of the following statements about the cost behavior is true?

A You pay the full cost upfront and cannot cancel or change the reservation later.

B Reserved Instances automatically scale to cover any VM size in the same region.

C You pay a discounted hourly rate only when the VM is running, otherwise no charge applies.

D You receive a significant discount compared to pay-as-you-go pricing, regardless of VM uptime, for the reserved term.

💡 Hint

Consider how reserved pricing works compared to pay-as-you-go.

Reserved Instances provide a discount for committing to a VM usage over a term, charged regardless of actual uptime, but do not automatically scale or allow cancellation.