Update some thing regarding interviews

_sidebar.md

@@ -6,7 +6,7 @@
 - [Kotlin](categories/kotlin.md)
 - [JavaScript](categories/javascript.md)
 - [Ruby](categories/ruby.md)
-- [Interview](categories/interview.md)
+- [Interview](categories/interviews/interview.md)
 - [Software Design](categories/software-design.md)
 - [Message Queue](categories/message-queue.md)
 - [Database](categories/database.md)

categories/interviews/interview.md

@@ -1,5 +1,23 @@
 # Interviews
 
+## System design
+
+### Questions to ask when you receive a question
+
+* How many users will be using it? What's the throughput we need to design for?
+* Do we need to consider accessing by users from multiple countries and regions?
+* Is this for a single tenant for multiple tenants?
+* What's the latency requirements?
+* Do we need to consider logging and montoring?
+
+### Steps to answer the question
+
+* First, briefly talk about what the high level design, the components
+* Briefly calculatt the traffic which relates to what db you choose and system architectures.
+* Talk about the DB choice and why, NOSQL or relational SQL database
+* Keep interation with interviewers, and ask if the answer is good enough, do you want me to dive deeper?
+
+
 ## resources
 
 - [https://github.com/kdn251/interviews](https://github.com/kdn251/interviews)
@@ -7,6 +25,7 @@
 - [5 Salary Negotiation Rules for Software Developers](https://dev.to/aershov24/5-salary-negotiation-rules-for-software-developers-get-20-on-top-of-your-market-rate-2jii)
 
 
+
 ## Some interview questions
 
 ### Why ssd is faster than hdd