Here are this week's Data Science Interview Questions along with the correct answer

Thread πŸ§΅πŸ‘‡

#MachineLearning #Python #100DaysOfCode
Answer by @josh_ko_naman

1) SL has a feedback mechanism.
UL has no feedback mechanism.

2) Supervised learning involves building a model for predicting, or estimating.
In unsupervised learning, we can learn relationships and structures from data

Answer by @ammaryh92 & @arunkumarai

-regularization
-simpler model architecture
-more training data
-reduce noise in the data
-reduce the number of input attributes
-shorter training cycles

Partial answer by @SpeculatorDon

Filter Methods
- Linear discrimination analysis
- ANOVA
- Chi-Square

Wrapper Methods
- Forward Selection
- Backward Selection
- Recursive Feature Elimination

Answer by @Shivu2021 & @josh_ko_naman

We use the elbow method to select k for k-means clustering.
At the point at which the graph gets smoother than that value, we select.

Answer by @Shivu2021

The recommendation engine is accomplished with collaborative filtering. Collaborative filtering explains the behavior of other users and their purchase history in terms of ratings, selection, etc.

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More from @PiyalBanik

9 Jul
15 Days roadmap to master #Python basics for #DataScience & #MachineLearning without having any Prior Experience.

[ Join the #100DaysOfCode & #66daysofdata challenge to keep yourself motivated ]

Thread πŸ§΅πŸ‘‡
Few things to keep in mind before starting
- Learn By Doing, Practicing & Not Just Reading
- Code By Hand [very effective]
- Share, Teach, Discuss and Ask For Help
- Use Online Resources
- Be consistent
- Learn to Use Debugger
I have done all the below-mentioned concepts as part of the #100DaysOfCode challenge and the code can be found in my @github profile.

[Projects & exercise not done. let me know if you want the solutions]

github.com/Piyal-Banik/10…
Read 21 tweets
3 Jul
Want to learn Data Science but confused about where to start and what to follow?

Here are the ultimate 12 months Learning path to becoming a Data Scientist πŸ‘¨β€πŸŽ“

Note: I'm personally following this roadmap

πŸ§΅πŸ‘‡

#DataScience #MachineLearning #100DaysOfCode #66DaysOfCode #Python
Since we're currently in July, so start from this month.

Understanding Data Science and getting started with Python
- what is data science?
- what does a data scientist do?
- find out various resources
- Set up the system
- Learn Python basics
- Introduction to Pandas & Numpy
August -

Mathematics, Statistics & SQL
- Linear Algebra
- Introduction to Probability
- Statistics - inferential & descriptive
- Exploratory Data Analysis
- SQL for Data science
- Projects on EDA and SQL

Start engaging in the Data Science & Machine Learning community
Read 14 tweets
2 Jul
Best Data Science blogs to follow in 2021

πŸ§΅πŸ‘‡

#DataScience #66daysofdata #100DaysOfCode
1. Towards Data Science

TDS is a Medium publication having audience-oriented content about Data Science, along with blogs on related fields such as Machine Learning, Programming, Visualization, and Artificial Intelligence.

towardsdatascience.com
2. Data Science Central

DSC is one of the leading repositories of Data Science content that is regularly updated with the latest trends across domains such as Artificial Intelligence, Machine Learning, Deep Learning, Analytics, Big Data, and much more.

datasciencecentral.com
Read 9 tweets
1 Jul
NumPy πŸ”₯

It is a Linear Algebra Library for #Python, the reason it is so important for Data Science is that almost all of the libraries in the PyData Ecosystem rely on NumPy as one of their main building blocksπŸ‘¨β€πŸ«.

Here's everything you needπŸ§΅πŸ‘‡

#DataScience #100DaysOfCode
1⃣Numpy Arrays

NumPy arrays are the main way we use Numpy. Numpy arrays essentially come in two flavors: vectors and matrices. Vectors are strictly 1-d arrays and matrices are 2-d (but you should note a matrix can still have only one row or one column). Image
2⃣Built-in Methods

There are lots of built-in ways to generate Arrays
- zeros
- ones
- eye
- arange
- linspace Image
Read 11 tweets
19 Jun
Ever wondered how a Data Scientist thinks about a problem? Here are the major steps involved in tackling a data science problem.

Thread πŸ§΅πŸ‘‡

#DataScience #MachineLearning #100DaysOfCode
1. Business Understanding: We should have clarity of what is the exact problem we are going to solve.

What is the problem that we are trying to solve? - Asking the right questions as a Data Scientist starts with understanding the goal of the business.
2. Analytical Approach: How can we use data to answer the question? We should decide the analytical approach to follow which can be of 4 types
- Descriptive
- Statistical
- Predictive
- Prescriptive
and it indicates the necessary data content, formats, and sources to be gathered
Read 12 tweets
18 Jun
Top 7 interesting careers related to Data Science to explore. Pick one and start learning.

Thread πŸ§΅πŸ‘‡

#DataScience #ArtificialIntelligence #MachineLearning #BigData
1. Data Scientist

Data scientist use their analytical and technical capabilities to extract meaningful insight from data.
2. Machine Learning Engineer

Machine Learning engineer's final output is the working software, and their audience for this output consists of other software components that run automatically with minimal human supervision. The decisions are made by machines.
Read 9 tweets

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