Data Science Interview Questions | Data Science Interview Questions Answers And Tips | Simplilearn

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[ruthesan]

Correct the error at 35:13 => Recall Rate = (True Positive) / (True Positive + False Negative)

[andyh.]

For the 1st question, I did it differently. Step 1 Fiil in the 3 liter bucket and pour the water in 5 liter bucket. (2 liter still not filled) Step 2 Fill in the 3 liter bucket again and pour the water in 5 liter bucket until it is filled (2 liter was available) so you have 1 liter left in 3 liter bucket. Step 3 Empty your 5 liter bucket completely and pour your 1 liter from 3 liter bucket in 5 liter bucket (you have 1 liter of water in 5 liter bucket). Step 4 Fill in the 3 liter bucket completely and then pour the 3 liters in 5 liter bucket (you have 4 liter in 5 liter bucket). This is more steps involved but also possible.

[unnikrishnantp]

In Random Forest, we bootstrap sample both features and training instances (rows). Very important point. Bootstrap sampling the features reduce bias error, and second one controls overfitting to a slight extend only though

[amsouvikghosh]

Excellent and very much informative video. For the question number 19, I was thinking to mention about Augmented Dickey Fuller test (ADF Test) which is a common statistical test used to test whether a given Time series is stationary or not.

[seshadris]

In the final question: Does offering coupons impacts purchase decision ?
Here we have 2 categorical variables - 'Coupons' and 'Purchased' both cotain 0 & 1.
Can't this be done using Cho Square?

[ajaykushwaha]

One of the greatest videos so far in the field of data science.

[EyiBillion]

Thank you. No video has impacted me this much.

[siddheshshanker]

Excellent video. Compiled almost all the important aspects of Data Science interview.
I have a doubt. For the recommendation, the algorithm that is being used is Decision tree.

[RahulKumar-ntgo]

This is a great video! Thank you for sharing.
Is association rule mining type of content based filtering?

[dudepamal]

Great video. Thanks for sharing. I think answer to question 11 could has more to do with curse of dimensionality, rather than computation and storage.

[sislastew]

Thank you so much. Keep the good stuff coming

[faychen]

Thanks for sharing. Can you explain a little bit more about ANOVA/one-way ANOVA, when should we use ANOVA?

[marwaa.]

Very rich and informative video.. thanks for the great effort.

[enes-the-cat-father]

Great video, thank you!

Additional info : 36:11, this is also called pigeonhole principle.

[ShadowknitezRS]

For the question at around the 45th minute
The first solution that comes to mind is your solution. However, if the rope is not uniform, doesn't that mean that folding it in half would not work? Let's say the left half burns completely in 20 minutes while the right half in 40 minutes, folding it in half would not really help you measure 30 minutes, and same goes to the folding in 4.

[KixMayne]

If I'm not mistaken cant Apriori fall into either category? Because you can augment it to use class labels.

[clevo]

" e to the base 2" might want to reconsider that one.
You got it right the second time you said it!

[seymatas]

As a physicist - data scientist, I first planned to make two pendulums using ropes, find the period using T =2Pi sqrt(length/gravitational acceleration). Measure time by using this pendulum clock. :)

[conorsmyth]

Let's talk about the pronunciation of hierarchical, a priori, and chi.

[antoniovazquez]

For question 15 you assume independence, which is (with the provided data) the only way to go, but it's a BIG assumption.