Существуют следующие гарантии доставки:
▪️ At most once —
▪️ At least once —
▪️ Exactly once —
Каждая из этих гарантий используется в зависимости от требований к надежности и производительности системы.
BY Библиотека собеса по Java | вопросы с собеседований
Telegram is a free app and runs on donations. According to a blog on the telegram: We believe in fast and secure messaging that is also 100% free. Pavel Durov, who shares our vision, supplied Telegram with a generous donation, so we have quite enough money for the time being. If Telegram runs out, we will introduce non-essential paid options to support the infrastructure and finance developer salaries. But making profits will never be an end-goal for Telegram.
Importantly, that investor viewpoint is not new. It cycles in when conditions are right (and vice versa). It also brings the ineffective warnings of an overpriced market with it.Looking toward a good 2022 stock market, there is no apparent reason to expect these issues to change.
Библиотека собеса по Java | вопросы с собеседований from no