Perguntas de entrevista de vagas de Software Engineer (Ios Developer) da empresa MetaOptima

I got an email from Director of software engineer and he setup 1 hour interview with him as well as with one iOS engineer. Ask some questions related to iOS like core data, API integration and others. After that they want me to write SQL query which was so hard because I am mobile developer not backend developer, also ask me to write one algorithm to implement second largest number from Array.