The toughest data science interview I ever had

I got bombarded for 45 minutes with theoretical questions:

๐Ÿ”ธ Entropy
๐Ÿ”ธ KL divergence, other divergences
๐Ÿ”ธ Kolmogorov complexity
๐Ÿ”ธ Jacobian and Hessian
๐Ÿ”ธ Linear independence
๐Ÿ”ธ Determinant

Continued ๐Ÿ‘‡

๐Ÿ”ธ Eigenvalues and Eigenvectors
๐Ÿ”ธ SVD
๐Ÿ”ธ The norm of a vector
๐Ÿ”ธ Independent random variables
๐Ÿ”ธ Expectation and variance
๐Ÿ”ธ Central limit theorem

๐Ÿ‘‡
๐Ÿ”ธ Gradient descent and SGD
๐Ÿ”ธ Other optimization methods
๐Ÿ”ธ The dimension of gradient and hessian for a neural net with 1k params
๐Ÿ”ธ What is SVM
๐Ÿ”ธ Linear vs non-linear SVM
๐Ÿ”ธ Quadratic optimization

๐Ÿ‘‡
๐Ÿ”ธ What to do when a neural net overfits
๐Ÿ”ธ What is autoencoder
๐Ÿ”ธ How to train an RNN
๐Ÿ”ธ How decision trees work
๐Ÿ”ธ Random forest and GBM
๐Ÿ”ธ How to use random forest on data with 30k features
๐Ÿ”ธ Favorite ML algorithm - tell about it in details

That was tough!

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And here they are...

THE WINNERS OF THE 24 HOUR STARTUP CHALLENGE

Remember, this money is just fun. If you launched a product (or even attempted a launch) - you did something worth MUCH more than $1,000.

#24hrstartup

The winners ๐Ÿ‘‡

#10

Lattes For Change - Skip a latte and save a life.

https://t.co/M75RAirZzs

@frantzfries built a platform where you can see how skipping your morning latte could do for the world.

A great product for a great cause.

Congrats Chris on winning $250!


#9

Instaland - Create amazing landing pages for your followers.

https://t.co/5KkveJTAsy

A team project! @bpmct and @BaileyPumfleet built a tool for social media influencers to create simple "swipe up" landing pages for followers.

Really impressive for 24 hours. Congrats!


#8

SayHenlo - Chat without distractions

https://t.co/og0B7gmkW6

Built by @DaltonEdwards, it's a platform for combatting conversation overload. This product was also coded exclusively from an iPad ๐Ÿ˜ฒ

Dalton is a beast. I'm so excited he placed in the top 10.


#7

CoderStory - Learn to code from developers across the globe!

https://t.co/86Ay6nF4AY

Built by @jesswallaceuk, the project is focused on highlighting the experience of developers and people learning to code.

I wish this existed when I learned to code! Congrats on $250!!