AZ-204 Practice Test 38 — 15 Questions

Question 1

You are troubleshooting an Azure App Service that runs a Node.js application. The application returns HTTP 500 errors intermittently. Application Insights is configured. Which telemetry item should you examine first to find the root cause?

Accepted Answer

Exceptions. Option D is correct because exceptions telemetry captures unhandled exceptions and stack traces. Option A (traces) may not include errors. Option B (requests) shows success/failure but not details. Option C (dependencies) shows external calls.

Answer

Traces

Answer

Dependencies

Answer

Requests

Question 2

Which TWO actions should you take to optimize costs for an Azure SQL Database that is underutilized? (Choose two.)

Accepted Answer

Purchase reserved capacity. Option B (scale down) and Option D (use reserved capacity) are correct because scaling down reduces compute costs and reserved capacity offers discounts. Option A (increase DTU) increases cost. Option C (geo-replication) adds cost. Option E (read scale-out) adds cost.

Answer

Enable geo-replication

Answer

Increase the DTU or vCore limit

Answer

Enable read scale-out

Question 3

Which THREE metrics should you monitor to determine if an Azure Kubernetes Service (AKS) cluster is running optimally? (Choose three.)

Accepted Answer

Node CPU usage percentage. Option A (Node CPU), Option B (Pod memory), and Option D (Disk I/O) are correct because they directly affect pod performance and cluster health. Option C (API server latency) is important but not a direct indicator of cluster workload optimization. Option E (Network bytes) is less critical for optimization.

Answer

API server request latency

Answer

Network bytes sent and received

Question 4

Which THREE tools can you use to diagnose performance issues in an Azure App Service? (Choose three.)

Accepted Answer

Application Insights. Option A (Application Insights), Option B (Kudu console), and Option D (App Service diagnostics) are correct. Option C (Azure SQL Analytics) is for SQL, not App Service. Option E (Azure Monitor for VMs) is for virtual machines.

Answer

Azure Monitor for VMs

Answer

Azure SQL Analytics

Question 5

You deploy a web app to Azure App Service. Users report intermittent 500 errors. How should you enable detailed error logging?

Accepted Answer

Enable Application Insights for the web app. Option A is correct because Application Insights provides detailed error tracking. Option B is wrong because it's for storage. Option C is wrong because it's a CDN. Option D is wrong because it's for DNS.

Answer

Configure Azure Storage account diagnostics

Answer

Set up Azure DNS logging

Answer

Enable Azure Front Door logging

Question 6

You need to reduce costs for an Azure Functions app that runs intermittently. The current Consumption plan bills for execution time. Which change would be MOST cost-effective?

Accepted Answer

Migrate to Flex Consumption plan with higher memory. Option B is correct because the Flex Consumption plan allows choosing higher memory which can reduce execution time for CPU-bound tasks, lowering cost. Option A is wrong because Premium plan has a fixed cost. Option C is wrong because Dedicated plan is more expensive for intermittent usage. Option D is wrong because App Service plan is not suitable for Functions.

Answer

Switch to Premium plan with pre-warmed instances

Answer

Use an App Service plan with Always On

Answer

Deploy to Azure Container Instances

Question 7

You need to monitor the performance of an Azure App Service web app. Which metric indicates high CPU usage?

Accepted Answer

CPU Time. Option C is correct because CPU Time measures the amount of CPU consumed by the app. Option A is wrong because it measures memory. Option B is wrong because it measures HTTP requests. Option D is wrong because it measures network traffic.

Answer

Data In/Out

Answer

Requests per second

Answer

Memory working set

Question 8

Your application running on Azure App Service is experiencing intermittent timeouts. You have configured Application Insights to collect telemetry. Which metric should you analyze in the Azure portal to identify the slowest dependencies?

Accepted Answer

Dependency Duration. Option C is correct because the 'Dependency Duration' metric in Application Insights shows the duration of calls to external dependencies. Option A is wrong because 'Request Duration' only measures the total time for requests, not specific dependencies. Option B is wrong because 'Availability' measures uptime, not performance. Option D is wrong because 'Failed Requests' tracks errors, not duration.

Answer

Request Duration

Answer

Failed Requests

Answer

Availability

Question 9

Which TWO actions should you take to reduce the cost of an Azure App Service plan that is underutilized?

Accepted Answer

Scale out to fewer instances. Options B and D are correct. Scaling down to a lower tier reduces cost. Scaling out to fewer instances also reduces cost. Option A is wrong because enabling auto-scaling may increase cost if it scales out. Option C is wrong because Reserved Instances require a commitment. Option E is wrong because deploying to a different region may not reduce cost.

Answer

Deploy the application to a different region

Answer

Enable auto-scaling

Answer

Purchase Reserved Instances

Question 10

Refer to the exhibit. You run this KQL query in Azure Monitor Logs. What does the timechart display?

Accepted Answer

Multiple lines, one for each result code, showing request count over time. Option D is correct because the query groups requests by 5-minute bins and result code, so the chart shows separate series for each result code. Option A is wrong because it aggregates over all result codes. Option B is wrong because it includes all result codes separately. Option C is wrong because it's not total requests but per result code.

Answer

A single line of total requests over time

Answer

Total requests per 5 minutes

Answer

Requests grouped by result code only

Question 11

You are troubleshooting a slow web application hosted on Azure App Service. The application uses Azure SQL Database. You suspect that the database queries are taking too long. Which Azure Monitor feature should you use to identify slow queries?

Accepted Answer

Azure SQL Analytics. Option C is correct because Azure SQL Analytics (now part of Azure Monitor) provides query performance insights. Option A is wrong because Azure Monitor Metrics does not include query details. Option B is wrong because Azure Activity Log tracks control plane operations. Option D is wrong because Azure Advisor provides recommendations, not detailed query performance.

Answer

Azure Activity Log

Answer

Azure Advisor

Answer

Azure Monitor Metrics

Question 12

Refer to the exhibit. You run these Azure CLI commands for an Azure Function app. When the app is accessed from https://app.contoso.com, what is the expected behavior?

Accepted Answer

Requests from the allowed origin are accepted. Option B is correct because CORS allows the origin, so requests from that origin will succeed. Option A is wrong because FTPS is not related to CORS. Option C is wrong because CORS allows all methods by default. Option D is wrong because CORS is configured correctly.

Answer

Only GET requests are allowed

Answer

Requests are blocked because FTPS is required

Answer

All requests are blocked because no origins are allowed

Question 13

Your Azure Functions app uses Durable Functions to orchestrate a workflow. The orchestration sometimes fails with a 'FunctionRuntimeException' due to a timeout. You need to increase the maximum orchestration time. What should you modify?

Accepted Answer

Set 'maxOrchestrationTimeout' in the host.json file. Option A is correct because the max orchestration time is controlled by the 'maxOrchestrationTimeout' setting in host.json. Option B is wrong because functionTimeout is for individual functions, not orchestrations. Option C is wrong because the storage account connection is for state persistence, not timeout. Option D is wrong because the app setting 'AzureFunctionsJobHost__functionTimeout' is not a standard setting.

Answer

Add an app setting 'AzureFunctionsJobHost__functionTimeout'

Answer

Change the Azure Storage account to a Premium account

Answer

Increase the 'functionTimeout' in host.json

Question 14

You deploy a microservices application to Azure Kubernetes Service (AKS). The application uses Azure Cache for Redis to store session state. Users report that they are frequently logged out. You suspect that the session data is being evicted from the cache. Which configuration change should you make to reduce evictions?

Accepted Answer

Increase the maxmemory-reserved setting or change eviction policy. Option B is correct because increasing the maxmemory-policy to 'allkeys-lru' or increasing memory allocation reduces evictions. Option A is wrong because enabling persistence (RDB/AOF) does not prevent evictions. Option C is wrong because enabling clustering adds complexity and does not directly reduce evictions. Option D is wrong because using a different tier with more memory is a valid solution, but the question asks for a configuration change within the existing cache instance.

Answer

Enable clustering for the cache

Answer

Enable data persistence using RDB or AOF

Answer

Upgrade to a higher-tier Azure Cache for Redis

Question 15

Which THREE features of Azure Monitor can help you diagnose a performance issue in an Azure Virtual Machine?

Accepted Answer

Log Analytics workspace queries. Options A, C, and D are correct. VM Insights provides performance charts. Log Analytics queries allow deep analysis. Diagnostic settings send data to Log Analytics. Option B is wrong because VM backup is unrelated. Option E is wrong because Network Watcher is for network issues, not VM performance.

Answer

Azure Network Watcher

Answer

Azure Backup reports