Your GitLab CI/CD pipeline is set up for a large application with multiple stages and jobs. Recently, you noticed that a specific job in the middle of the pipeline is failing, causing the subsequent jobs to be skipped. You want to identify the root cause efficiently using the GitLab Pipeline Graph. Which of the following steps should you take to pinpoint the issue?
Which of the following executors is an uncommon executor used in GitLab CI/CD, specifically for running jobs in isolated environments that are not typically found in common use cases?
You are managing a complex GitLab CI/CD pipeline that involves multiple stages and needs to deploy to different environments (development, staging, and production) only after successful testing. Which GitLab CI/CD feature would you use to organize and manage this complexity efficiently?
You are managing a CI/CD pipeline in GitLab where you need to deploy a multi-tier application with separate services for the frontend, backend, and database. Each tier must be deployed in a specific order and verified before proceeding to the next. How would you configure this pipeline to ensure proper deployment and verification?