Types of Data

Question 1

What is structured data

Answer 1

Data that has predefined structures, e.g. tables, spreadsheets, or relational databases

Question 2

What is unstructured data?

Answer 2

Data with no predefined structure, comes in any size or form, cannot be easily stored in tables, e.g. blobs of text, images, audio

Question 3

Quantitative vs. Categorial Data

Answer 3

Quantitative: numerical data, e.g. height, weight
Categorial: data that can be labeled or divided into groups, e.g. race, sex, hair color

Question 4

What is Big Data?

Answer 4

Massive datasets, or data that contains greater variety arriving in increasing volumes and with ever-higher velocity (3 V’s). Cannot fit in the memory of one single machine

Question 5

Common data formats

Answer 5

CSV, XML, SQL, JSON, Protocol Buffers

Question 6

Data Sources

Answer 6

Companies/Proprietary data, APIs, Government, Academic, Web scraping/crawling