101ХР

Should you use proprietary or third-party technologies in a project?

Model a simple banking system: - `accounts` table: - `id`, - `owner_id`, - `currency`, - `created_at`. - `transactions` table: - `id`, - `account_id`, - `amount`, - `created_at`. **Requirements:** 1. Write SQL to create the schema with necessary constraints (NOT NULL, FK, CHECK on non-zero `amount`). 2. Write a query: - to get the current account balance by `account_id` (sum of amount). 3. Harder: support debit/credit (double entry). Cleanup

// we have a method to get product information, this method is called very often // are there any problems with this code and how to fix it? PostgreSQL database

Explain the difference between a list and a tuple in Python. How was the process of maintaining and storing documentation organized in your previous team?

How to calculate the K-factor?

Describe the stages of Tuckman (forming/storming/norming/performing)