Book Image

Cracking the Data Science Interview

By : Leondra R. Gonzalez, Aaren Stubberfield
Book Image

Cracking the Data Science Interview

By: Leondra R. Gonzalez, Aaren Stubberfield

Overview of this book

The data science job market is saturated with professionals of all backgrounds, including academics, researchers, bootcampers, and Massive Open Online Course (MOOC) graduates. This poses a challenge for companies seeking the best person to fill their roles. At the heart of this selection process is the data science interview, a crucial juncture that determines the best fit for both the candidate and the company. Cracking the Data Science Interview provides expert guidance on approaching the interview process with full preparation and confidence. Starting with an introduction to the modern data science landscape, you’ll find tips on job hunting, resume writing, and creating a top-notch portfolio. You’ll then advance to topics such as Python, SQL databases, Git, and productivity with shell scripting and Bash. Building on this foundation, you'll delve into the fundamentals of statistics, laying the groundwork for pre-modeling concepts, machine learning, deep learning, and generative AI. The book concludes by offering insights into how best to prepare for the intensive data science interview. By the end of this interview guide, you’ll have gained the confidence, business acumen, and technical skills required to distinguish yourself within this competitive landscape and land your next data science job.
Table of Contents (21 chapters)
Free Chapter
1
Part 1: Breaking into the Data Science Field
4
Part 2: Manipulating and Managing Data
10
Part 3: Exploring Artificial Intelligence
16
Part 4: Getting the Job

Getting started with unsupervised machine learning

Unsupervised machine learning is a fascinating branch of artificial intelligence that focuses on discovering patterns, relationships, and structures within data without explicit guidance from labeled outcomes. Unlike supervised learning, where models are trained with labeled data to make predictions, unsupervised learning aims to explore the inherent information present in the data itself. This type of learning is particularly valuable for uncovering hidden insights, finding clusters, reducing dimensionality, and revealing underlying representations. Clustering is a common use case for unsupervised learning.

Clustering refers to grouping data points into distinct subsets or “clusters” based on similarities in their features without using pre-labeled data as a guide. Imagine that you have a scatter plot of data points and want to color-code groups of points that seem to cluster together; this is essentially what clustering...