Net Bet interview questions

A head of development - 1. Explain "Clean Code" concept 2. Are you familiar with SOLID? 3. What Design Patterns do you know? 4. what is Dependency Injection? uses? 5.explain Virtual DOM 6. setState - when to use? what parameters it uses? 7. Pure Component vs Component, when to use? 8. class component vs function component 9. Assuming our page loads about 20 sec', 9.a. how can check the main cause? 9.b. how can you improve/optimize it? 9.c. how to optimize single api requset? 9.d. how to optimize slow DB requests? 10 .what type of cache do you familiar with? A head of Finance- 1. what kind of cache are you familiar with? 2. client cache - how to store data in the browser? 3. how long data is stored in the Cookie? 4. find a missing number in array the contains the numbers 1-100 Example: input: [9,1,3,2,5,6,7,8,10] output: 4

find the second biggest number in the array