How was task acceptance carried out in your previous company? What testing environments were used?

In the previous company, task acceptance was carried out according to the following process:

• After development and internal testing by the developer, the task was handed over to QA engineers.
• QA conducted functional testing on a dedicated test environment that closely resembled production.
• Several test environments were used:
  • Dev — for integration testing and debugging new features.
  • QA — the main test environment for regression and functional testing.
  • Staging — an environment as close to production as possible for acceptance testing and performance verification.

Testing included manual checks and automated tests. After successfully passing all stages, the task moved to the release phase.