Unlock PHP Magic: How to Take Input from User in PHP Easily
9 Aug 2025
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Release & Deploy (RD)
Describe how to automate a Scheduled Release (e.g., deploying the Friday feature branch at 2:00 AM Monday morning). Detail the role of a release management tool in holding the artifact and executing the deployment command at the exact scheduled time.
List 5 essential technical requirements (e.g., load balancer health checks, database connection pooling) that must be in place to successfully execute a Zero-Downtime Deployment for a stateful web application.
Explain the Zero Trust principle as it applies to deployment infrastructure. Outline 3 security measures (e.g., ephemeral credentials, network segmentation) that must be enforced during the deployment phase to ensure the build agent only accesses the resources it absolutely needs.
Describe the automation required for a Time-Based Release Trigger (e.g., the deployment only runs between 10 AM and 5 PM local time). Explain why restricting deployments to specific windows is a common risk mitigation strategy.
Design a set of Automated Approval Gates for promoting a release from Staging to Production. List 4 mandatory gate checks (e.g., E2E test pass, SLO compliance, security scan score, management sign-off) that must all turn green before deployment begins.
Describe the critical monitoring steps during a Rolling Deployment across 50 VMs. Specify the two key health metrics (e.g., HTTP status code, CPU usage) that must be checked on a newly updated VM before the deployment proceeds to the next batch.
Develop a mandatory policy for Resource Tagging across all cloud infrastructure provisioned by IaC. List 5 mandatory tags (e.g., Owner, Environment, Cost Center, Application Name) and explain how this aids cost management and incident response.
Define Progressive Delivery. Compare it to Continuous Delivery and provide two specific examples of tools or techniques (e.g., service mesh, feature flags) that enable the progressive rollout of new features.
Develop a plan for rolling back a failed infrastructure change (e.g., a Terraform script that broke the network). The plan must include storing the previous working IaC State File and the single command required to revert to the known good state.
Describe how a Deployment Pipeline can be integrated with an A/B Testing system. The process should detail how a small percentage of users are routed to a specific deployed code version (Variant B) based on a load balancer or service mesh rule.
Describe the GitOps deployment workflow. Explain how Git becomes the 'single source of truth' and how a continuous delivery agent (e.g., ArgoCD) uses a change in a Git repository to trigger a cluster update.
Describe the steps to implement a Blue/Green Deployment strategy for a web application running on Kubernetes. Detail the role of the load balancer/service mesh in directing traffic from 'Blue' to 'Green' and the specific actions required for a safe 'rollback'.
Explain the principle of Immutable Infrastructure. Describe how this concept (e.g., using packer to create AMIs) differs from mutable infrastructure and the specific benefits it provides for rollback and testing.
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