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===== Datadog Sample Exam Questions =====

**1. Can the Datadog Agent be installed and run on any operating system?**  
Choose only ONE best answer:  
  * **A:** No, it only supports running on Linux-based operating systems.  
  * **B:** No, you need to check the version of your operating system to ensure its compatibility.  
  * **C:** Yes, it can run on any version of an operating system without issue.  

---

**2. Which of the following is a correct statement?**  
Choose only ONE best answer:  
  * **A:** No one is billed twice if they are running the Agent on an AWS EC2 instance that is also picked up by the Datadog AWS integration.  
  * **B:** Host level metrics can be obtained with almost no delay by relying on those provided by cloud services for a cloud-based host.  
  * **C:** Host level metrics can be obtained with a higher resolution by using those provided by cloud services instead of the Datadog Agent.  

---

**3. Which of the following is a valid data source to populate an integration template when using the Datadog Agent's Autodiscovery feature in a Docker environment?**  
Choose only ONE best answer:  
  * **A:** Key-value stores  
  * **B:** Helm Chart  
  * **C:** ConfigMap  

---

**4. Dogstatsd uses UDP instead of TCP because**  
Choose only ONE best answer:  
  * **A:** it is very reliable given it guarantees the delivery of applications metric data to DogStatsD.  
  * **B:** it is a connection-oriented protocol so the application will wait to transmit data in case DogStatsD isn't available.  
  * **C:** it allows the application to send metrics to DogStatsD and resume its work without waiting for a response.  

---

**5. Datadog Authentication (crawler) based integrations**  
Choose only ONE best answer:  
  * **A:** use credentials provided by the user in Datadog for obtaining metrics with the API.  
  * **B:** are installed with the Datadog Agent and use a Python class method called check to define the metrics to collect.  
  * **C:** use the Datadog API to allow monitoring of applications based on the language they are written in.  

---

**6. In Datadog, metrics submitted with fractions of a second timestamp**  
Choose only ONE best answer:  
  * **A:** are rounded to the nearest whole second.  
  * **B:** are stored in milliseconds to account for the fraction.  
  * **C:** are rejected by the metrics endpoint upon submission.  

---

**7. Which of the following commands will display the distribution and version of a Linux host?**  
Choose only ONE best answer:  
  * **A:** cat /etc/os*  
  * **B:** uname -n  
  * **C:** hostname  

---

**8. When wanting to install the Datadog Agent on 10 hosts by using a new Ansible server, the Ansible server has been set up, hosts have been added to the inventory file, and the necessary connectivity has been verified. Which step should be taken NEXT on the Ansible server?**  
Choose only ONE best answer:  
  * **A:** Run the Datadog Agent installation command.  
  * **B:** Install the Datadog role from Ansible Galaxy.  
  * **C:** In the ansible.cfg file, set the host_key_checking variable to False.  

---

**9. When a user wants to instrument an application to send custom metrics to Datadog, how should they edit the Agent configuration file?**  
Choose only ONE best answer:  
  * **A:** Un-comment the use_dogstatsd and dogstatsd_port parameters.  
  * **B:** Un-comment the use_dogstatsd parameter and set it to true.  
  * **C:** Un-comment the dogstatsd_port parameter and set it to 8125.  

---

**10. Which feature allows the ability to submit custom metrics programmatically to Datadog?**  
Choose only ONE best answer:  
  * **A:** Datadog Agent  
  * **B:** DogStatsD  
  * **C:** Datadog API  

---

**11. What is the main difference between Linux OS and Windows?**  
Choose only ONE best answer:  
  * **A:** Linux is a free open source OS while Windows is a proprietary OS.  
  * **B:** Linux is a free OS while Windows is a paying OS.  
  * **C:** Linux is more secure than Windows.  

---

**12. Unified service tagging is a best practice that ties Datadog telemetry together through the use of which three standard tags?**  
Choose only ONE best answer:  
  * **A:** host, service, and source  
  * **B:** service, device, and version  
  * **C:** env, service, and version  

---

**13. To run an agent subcommand, this syntax must be used:**  
<AGENT_BINARY><SUB_COMMAND> <OPTIONS>  
In order to get all the configurations loaded and resolved, which of the following subcommands should be used?  
Choose only ONE best answer:  
  * **A:** diagnose  
  * **B:** configcheck  
  * **C:** check  

---

**14. Once an integration is enabled/configured, the out-of-the-box dashboards are**  
Choose only ONE best answer:  
  * **A:** to be cloned and used as templates.  
  * **B:** the source of truth for all metrics collected for the integration.  
  * **C:** empty until new widgets are created.  

---

**15. To configure the Agent log level to collect critical, error, and warn logs only, how should the local datadog.yaml file be modified?**  
Choose only ONE best answer:  
  * **A:** Replace # log_level: INFO with log_level: CRITICAL.  
  * **B:** Replace # log_level: INFO with log_level: ERROR.  
  * **C:** Replace # log_level: INFO with log_level: WARN.  

---

**16. For a host running in AWS, how does the Datadog agent determine the hostname?**  
Choose only ONE best answer:  
  * **A:** The hostname must be configured in the agent's datadog.yaml file.  
  * **B:** The agent automatically discovers the EC2 instance id.  
  * **C:** The agent uses the IP address.  

---

**17. When a Datadog user account is disabled, what happens to the API and application keys that were created by this account?**  
Choose only ONE best answer:  
  * **A:** API keys created by the disabled account remain valid. Application keys created by the disabled account are revoked.  
  * **B:** API keys created by the disabled account remain valid. Application keys are transferred to the admin account that created the disabled account. If this admin account is also disabled, the application keys are revoked.  
  * **C:** API and application keys created by the disabled account are revoked.  

---

**18. When a user is making configuration changes in a datadog.yaml file, which of the following is true?**  
Choose only ONE best answer:  
  * **A:** The Datadog Agent must be restarted to apply changes made to datadog.yaml.  
  * **B:** The Datadog Agent must be stopped before making any changes to datadog.yaml. Changes at runtime may result in an error.  
  * **C:** Changes can be made dynamically in datadog.yaml.  

---

**19. Which of the following BEST describes custom metrics in Datadog?**  
Choose only ONE best answer:  
  * **A:** All non-Agent metrics, such as those submitted by an integration, are considered custom metrics.  
  * **B:** Any metric submitted using DogStatsD or a custom Agent Check is considered a custom metric.  
  * **C:** All metrics that are submitted by a community integration are considered custom metrics.  

---

**20. Which of the following is a deployment tool?**  
Choose only ONE best answer:  
  * **A:** Kubernetes  
  * **B:** Red Hat Enterprise Linux  
  * **C:** Ansible  

---

**21. After making configuration changes to datadog.yaml while the Agent is running, the Agent will apply the changes**  
Choose only ONE best answer:  
  * **A:** the next time it starts.  
  * **B:** during the next check cycle.  
  * **C:** when it receives the reload command.  

---

**22. What is the purpose of the auto_conf.yaml file in an integration's conf.d directory?**  
Choose only ONE best answer:  
  * **A:** It is an example configuration template for the integration.  
  * **B:** It allows the agent to AutoDiscover services and monitor them using the integration.  
  * **C:** It configures the integration to run automatically.  

---

**23. An application is instrumented to send custom metrics via StatsD. What needs to be done in order to send histogram metrics?**  
Choose only ONE best answer:  
  * **A:** Use StatsD to send histogram metric types.  
  * **B:** Add DogstatsD instrumentation to send histogram metric types.  
  * **C:** Calculate histogram values in the application and use StatsD to send them as metrics.  

---

**24. The agent on an Ubuntu host has been temporarily stopped in order to edit a configuration file, but needs to be started again. What is the command to run?**  
Choose only ONE best answer:  
  * **A:** sudo datadog-agent restart  
  * **B:** sudo service datadog-agent restart  
  * **C:** sudo service datadog-agent start  

---

**25. For a Datadog Agent running on a host, what is the definitive method for determining its default configuration values?**  
Choose only ONE best answer:  
  * **A:** Examine its original datadog.yaml file.  
  * **B:** Read the Agent documentation on docs.datadoghq.com.  
  * **C:** Run the command datadog-agent configcheck.  

---