BA & SA | 10000 Interview questions
Вопросы и задачи, которые задают на собеседованиях на позицию Бизнес и Системного аналитика. По вопросам сотрудничества- @DeliveryManager7
Show more📈 Analytical overview of Telegram channel BA & SA | 10000 Interview questions
Channel BA & SA | 10000 Interview questions (@systemanalystinterview) in the Russian language segment is an active participant. Currently, the community unites 10 210 subscribers, ranking 3 873 in the Career category and 64 191 in the Russia region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 10 210 subscribers.
According to the latest data from 15 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by 301 over the last 30 days and by -1 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 3.19%. Within the first 24 hours after publication, content typically collects 2.35% reactions from the total number of subscribers.
- Post reach: On average, each post receives 326 views. Within the first day, a publication typically gains 240 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 3.
- Thematic interests: Content is focused on key topics such as объяснение, индекс, user_id, субд, паттерн.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“Вопросы и задачи, которые задают на собеседованиях на позицию Бизнес и Системного аналитика. По вопросам сотрудничества- @DeliveryManager7”
Thanks to the high frequency of updates (latest data received on 16 June, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Career category.
(order_id, product_id), так как один заказ может содержать несколько товаров.
customer_id, customer_name, order_date зависят только от order_id (части ключа), а не от product_id.
product_price зависит только от product_id (части ключа).
Это частичные зависимости – нарушение 2НФ.
Как исправить?
Разделить на три таблицы:
Orders (order_id, customer_id, order_date)
Customers (customer_id, customer_name)
OrderItems (order_id, product_id, quantity)
Products (product_id, product_price)
Реальный кейс:
В старой учётной системе были проблемы с дублированием имён клиентов и цен товаров. После нормализации до 3НФ избыточность снизилась на 70%, а обновление имени клиента перестало требовать правки тысяч записей.
Вывод: Аналитик, проектируя схему БД, должен проверять составные ключи на наличие частичных зависимостей (2НФ) и транзитивных зависимостей (3НФ).
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