What is missing since the androidmanifest.xml file is not present?

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The androidmanifest.xml file is a crucial component of an Android application. Its absence could lead to various issues, including:

1. The app won't be able to register its components, such as activities, services, and broadcast receivers.
2. The app won't be able to request permissions and provide necessary information about its features and requirements.
3. The app won't be visible in the app drawer and won't be launchable.
4. The app won't be able to receive important system events, such as notifications or alarms.
5. The app won't be able to interact with other apps and system components.