What “interface” (like Firebase) should I use to create an online quiz app 1 to 1 player in Android Studio [closed]

I have found ways to connect one user with another in pvp gameplay. They are Firebase and socket.io as well as Google Cloud Open Match.Firebase and Google Cloud Open Match requires fees which I don’t wish spend money on. Even though Firebase is free for its spark plan, but it limits the simultaneous connectivity between…

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CMake Error (find_package) – compilation Geant4 example

CMake Error at CMakeLists.txt:14 (find_package): By not providing “FindGeant4.cmake” in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by “Geant4”, but CMake did not find one. Could not find a package configuration file provided by “Geant4” with any of the following names: Geant4Config.cmake geant4-config.cmake Add the installation prefix of “Geant4″…

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