Infrastructure and Reliability Engineering CT-QDO Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   A team is using Chaos Monkey to test resilience. They have a service that runs on multiple instances behind a load balancer. They want to ensure that the service can handle the loss of a single instance without user impact. Which experiment design is most appropriate?

   • ATerminate one instance and verify that the load balancer redirects traffic to the remaining instances
   • BTerminate all instances at once to test full failure recovery
   • CTerminate the load balancer instead of an instance
   • DTerminate an instance and then immediately restart it without checking the impact
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   A team uses Ansible for configuration management. They have a playbook that installs a package, but they notice that on subsequent runs, the task reports 'changed' even though the package is already installed. This causes unnecessary notifications and potential service restarts. What is the most likely cause and best fix?

   • AThe inventory file is not updated with the correct hostnames
   • BThe playbook is missing the `become: true` directive
   • CThe playbook is using `gather_facts: no`
   • DThe task is not idempotent because it uses the `command` module instead of the `package` module
   Reveal Solution Discussion Select an answer first
4. 23expert · hard

   A company is migrating from manual infrastructure management to Infrastructure as Code. They have a complex legacy environment with many undocumented dependencies. They want to adopt IaC without causing downtime. What is the most effective strategy?

   • AGradually import existing resources into IaC management, starting with the least critical components
   • BRecreate the entire environment from scratch using IaC and then cut over
   • CUse a configuration management tool to document the environment, but continue manual provisioning
   • DAdopt IaC only for new resources, leaving existing resources unmanaged
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which statement best describes the role of Infrastructure as Code in DevOps?

   • AIt replaces the need for configuration management tools entirely
   • BIt is a tool that automatically monitors infrastructure performance
   • CIt enables infrastructure to be treated like application code, with version control and automated deployment
   • DIt requires all infrastructure to be hosted in a public cloud
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What does it mean for an IaC configuration to be idempotent?

   • AThe configuration automatically rolls back if an error occurs
   • BThe configuration can only be applied once and then must be recreated
   • CApplying the same configuration multiple times results in the same desired state
   • DThe configuration is encrypted to prevent unauthorized changes
   Reveal Solution Discussion Select an answer first