Prometheus and Grafana integration concept in Spring Boot - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the primary role of Prometheus in monitoring a Spring Boot application?

Choose the best description of what Prometheus does when integrated with a Spring Boot app.

A It deploys the Spring Boot application to the cloud.

B It visualizes the metrics data using dashboards and charts.

C It collects and stores metrics data from the application for analysis.

D It automatically fixes performance issues detected in the app.

💡 Hint

Think about which tool is responsible for gathering data versus showing it.

Prometheus is designed to collect and store metrics data. Grafana is used for visualization.

💻 Command Output

intermediate

What output does this Prometheus scrape config produce?

Given this Prometheus scrape configuration snippet, what is the target URL Prometheus will scrape?

Spring Boot

scrape_configs:
  - job_name: 'springboot-app'
    static_configs:
      - targets: ['localhost:8080']

A Prometheus scrapes metrics from http://localhost:8080/metrics

B Prometheus scrapes metrics from http://localhost:8080/api/metrics

C Prometheus scrapes metrics from http://localhost:9090/metrics

D Prometheus scrapes metrics from http://localhost:8080/monitor

💡 Hint

Prometheus defaults to scraping the /metrics path unless overridden.

Since no metrics_path is specified in the scrape config, Prometheus defaults to /metrics and scrapes http://localhost:8080/metrics.

❓ Configuration

advanced

Which Spring Boot property enables Prometheus metrics endpoint?

Select the correct property to enable Prometheus metrics endpoint in application.properties.

A management.endpoints.web.exposure.include=prometheus

B spring.metrics.export.prometheus.enabled=false

C management.endpoint.prometheus.enabled=false

D spring.boot.metrics.prometheus.endpoint=true

💡 Hint

Look for the property that exposes endpoints over web.

To expose the Prometheus endpoint, you must include it in the management endpoints web exposure list.

🔀 Workflow

advanced

What is the correct order to integrate Prometheus and Grafana with Spring Boot?

Arrange these steps in the right order to set up monitoring with Prometheus and Grafana for a Spring Boot app.

A 1,3,2,4

B 3,1,2,4

C 2,1,3,4

D 1,2,3,4

💡 Hint

Think about enabling metrics first, then scraping, then visualization.

You first expose metrics in Spring Boot, then configure Prometheus to scrape them, then connect Grafana to Prometheus, and finally build dashboards.

❓ Troubleshoot

expert

Why does Grafana show 'No data' for Spring Boot metrics despite Prometheus scraping successfully?

Prometheus scrapes Spring Boot metrics without errors, but Grafana dashboards show 'No data'. What is the most likely cause?

A Spring Boot metrics endpoint is disabled

B Grafana data source is not set to Prometheus or has wrong URL

C Prometheus scrape interval is too long

D Grafana dashboards are not refreshed automatically

💡 Hint

Check the connection between Grafana and Prometheus.

If Prometheus scrapes metrics correctly but Grafana shows no data, the Grafana data source is likely misconfigured or pointing to the wrong Prometheus URL.