What ?

• This is a LLD question asked to me in CRED interview, the problem looks simple from outside.
• These are the params you would be judged on :

1. Functional Correctness !
2. Abstraction
3. Proper Interface
4. Extensibilty
5. Clean Code, Principles : SOLID, DRY, KISS etc

Why this ?

• This repo gives a sample implementation that I did after thinking for sometime why I failed;
• I coded this up in python, which in itself was shitty choice, not strictly typed and people generally don't want to read it.
• There would be 2 dirs inside this,
  • a python one, <this is what I wrote in 90 mins in interview scenario>
  • a java one, <this is what I wrote in retrospect, after reading 2 chapters of Head First Design Patterns>

Outcomes :

1. Read "Head First Design Patterns"; It actually makes sense to me now.
2. Do and just not speak; atleast write code for 10 machine coding rounds; before you can solve the 11th one in a live coding environment.
3. Learn the langauge, my java knowledge is hand-wavy; I write code till IDE thinks it makes sense, this is not how to be as a SWE.
4. Learn what language has to offer, example know when to use a "abstract" class vs an "interface"
5. Practice more you fool.