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Updated by edureka.co on Jul 15, 2019
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Data Science Career Opportunities: Your Guide To Unlocking Top Data Scientist Jobs Data Scientist Skills – What Does It

This blog is a guide on how to become a Data Scientist. One thing is for sure, you cannot become a data scientist overnight. It’s a journey, for sure and a challenging one.

1

Fundamentals:

This includes:

Matrices and Linear Algebra Functions
Hash Functions and Binary Tree
Relational Algebra, Database Basics
ETL ( Extract Transform Load )
Reporting VS BI (Business Intelligence) VS Analytics

2

Statistics:

This includes:

Descriptive Statistics (Mean, Median, Range, Standard Deviation, Variance)
Exploratory Data Analysis
Percentiles and Outliers
Probability Theory
Bayes Theorem
Random Variables
Cumulative Distribution function (CDF)
Skewness
Other Statistics fundamentals

3

Programming:

Expertise in any one programming language, I would suggest ‘R’ or ‘Python.

4

Machine Learning and Advanced Machine Learning (Deep Learning):

You should understand what is Machine learning and how it works.

Understand different types of Machine Learning techniques:

Supervised Learning
Unsupervised Learning
Reinforcement Learning

Good knowledge on various Supervised and Unsupervised learning algorithms is required such as:

Linear Regression
Logistic Regression
Decision Tree
Random Forest
K Nearest Neighbor
Clustering (for example K-means)

Nowadays everyone is talking about Deep Learning, as it solved a lot of limitations of traditional Machine Learning approaches. I would suggest you to understand how Deep Learning works. I have listed down few Deep Learning concepts that you should be familiar with:

  • Fundamentals of Neural Networks
  • Any one library used for creating Deep Learning models, such as Tensorflow or Keras.
  • Understand how Convolutional Neural Networks, Recurrent Neural Networks and RBM and Autoencoders work.
5

Data Visualization:

Data visualization is a very important part of Data life-cycle.

Good hands-on knowledge is required on various visualization tools. Even, you can use a programming language for that purpose.

Below are few visualization tools:

Tableau
Kibana
Google Charts
Datawrapper

6

Big Data:

Big Data is everywhere and there is almost an urgent need to collect and preserve whatever data is being generated, for the fear of missing out on something important.

There is a huge amount of data floating around. What we do with it is all that matters right now. This is why Big Data Analytics is in the frontiers of IT. Big Data Analytics has become crucial as it aids in improving business, decision makings and providing the biggest edge over the competitors. This applies for organizations as well as professionals in the Analytics domain.

As a Data Scientist it is very important to have knowledge about frameworks that can process Big Data. Two of the most famous ones are ‘Hadoop’ and ‘Spark’.

7

Data Ingestion:

The process of importing , transferring , loading and processing data for later use or storage in a database is called Data Ingestion. This involves loading data from a variety of sources.

Below are few Data Ingestion tools:

Apache Flume
Apache Sqoop

8

Data Munging:

If you have ever performed data analysis, you might have come across feature selection before you apply your Analytical model to the data.

So, in general, all the activity that you do on the raw data to make it “clean” enough to input to your analytical algorithm is data munging.

You can use ‘R’ and ‘Python’ packages for that.

It is one of the most important part of the data life-cycle.

As a Data Scientist you should be able to understand what all features are important in the dataset and what all features can be removed. You should also be able to identify your dependent variable or label.

Obviously, you have to remove inconsistency in the dataset.

All of these things are part of Data Munging (Data Wrangling).

9

Tool Box:

You might find this section pretty redundant, but I think it is very very important to have good knowledge on certain tools like:

MS Excel
Python or R
Hadoop
Spark
Tableau

10

Data-Driven Problem Solving:

All the things we have discussed so far, includes tools and technologies that you can learn. But, Data-Driven problem solving approach is something that you need to develop. It will only come with experience.

A Data Scientist needs to know how to productively approach a problem.

This means identifying a situation’s

  • salient features,
  • figuring out how to frame a question that will yield the desired answer,
  • deciding what approximations make sense, and
  • consulting the right co-workers at the appropriate junctures of the analytic process.