Accern interview questions

I got a call from the HR for Backend python developer. It had 3 rounds I. Technical round II. Managerial round III. Hr round In the first round they asked very basic questions. 1. Why dictionary works faster? What is the mechanism behind that? 2. Decorator and write one example 3. Difference between Generator and function 4. There are 10 each containing 10 coins each In 9 bags all 10 coins weigh 10gm each In 10th bag all 10 coins weighs 11gm each You are given one weighing machine and you can measure only one time from that and you have to identify which bag contains all coins of 11gm In second round they grind you on your past projects and work and try to understand your understanding level of your project and your knowledge level from that.