# data case practice guide

### sample questions:

- bank called us to help improve their business or help on fraud, what would you do and what data to collect

- manafuter company asked us to help on using data to improve their business

- the maintenece cost of an airline company is high, lots of problem for the aircraft, how would you use data to solve this problem?
- how would you quantify the result

- a bank called us to design a money laundering algo
1. what data you will collect and how will you design it?
- A payments processor wanted you to help increase revenue from small and medium merchants
8. use data to help pharmacutical company to gain market share
- allocate resource of covid outbreak
1. quantfiy the impact and disease transmission

- a disease, how would you identify patients for treament and what data will you use
- if not in system, how do you identify them

- reduce traffice

- City - - - |- - - | - - - | - - - | - - - | - - - Suburbs

- toll system: every entry point there is toll station (|) and from city to suburbs

- problem: a lot of traffic jam
- analyst for the city
- create algoth change the price in real-time (parameters) to reduce the traffic

cover:
1) Data
2) Insights / Metrics
3) Algorithm
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### questions to included during interview

1. what data you want to collect and write it down in row/columns
2. alternative data
3. what metrics will you use
4. how would you use data to
1. idenfiy users / cohort
2. improve business
3. build model

### things to be included

1. push me to brainstorm more solutions when I finish one
- ex) what more do you have
3. ()be impatient and stress test

### what I want to improve

- when I am anxios or not sure how to answer, still able to calm down and express my opinion well

- imprvoe how I talk
- with complex thoughts ( long sentences)
- able to break it dwon and pause, ask HM's opinion on the direction to go and engage her
- when panic, not sure how to answer
- pause and see if I can come up with new idea
- proactively further refine the problem
- any constraint or can I consider this scenario
- know how to answer
- structure better in a way ppl can easily consume your thoghts
- rephrase the problem, main idea, then supporting sentneces

- about data
- write it down in a systematic approach then brainstomre
- a. process
- b. object
- c. view
- in columns/raws

- the intuition to understand the heart of the problem
- from a very broad scenario, able to step-by-step understand the heart of the question

- stuructre to follow answer
- instead of having an ultimate answer in mind, try to got step-by-step and work with the HM on this journey togehter

- be more collaborative
- try to tell them the idea you had and ask what they think and which direction will they choose ( but provide your opinion on which direction is better before asking them)
- by doing so, you help them feel more engaged
- saying which direction to go and your reason makes you sound somoene has his own opinion and willing to listen/collaborate