Which App Engine environment is based on preconfigured container instances?Both standard and flexible environmentsFlexible environmentStandard environment

Answer

The App Engine environment that is based on preconfigured container instances is the Flexible environment.

Explanation

Google App Engine provides two distinct environments for hosting applications: the Standard environment and the Flexible environment.

1. Standard Environment: This environment is highly optimized for applications with constrained dependencies. It uses a predefined set of runtimes and has limitations regarding the customization of the underlying infrastructure and system packages. The Standard environment automatically scales your applications and is designed for applications that can run in a sandboxed environment.

2. Flexible Environment: In contrast, the Flexible environment allows developers to use custom runtime environments through the use of Docker images. This means that applications can run in preconfigured container instances, enabling the use of a wider array of programming languages, libraries, and system packages. The Flexible environment is designed for applications that require additional control over the underlying system, such as the installation of specific software or custom configurations.

Therefore, the correct answer is the Flexible environment, as it supports the deployment of applications within preconfigured container instances, providing greater flexibility and capability for developers.