Chapter 22 - Big Data

Question 1

What is big data

Answer 1

Big data are extremely large collections of data that may be analysed to reveal patterns and trends especially relating to human behaviour

Question 2

What characteristics does big data have

Answer 2

Volume
Large amount of data, more than can be easily handled by a single computer

Velocity
Data arrived continuously and often has to be processed very quickly to yield useful results

Variety
Disparate non uniform data of different sizes sources shapes arrive irregularly some from internal sources and some from external sources some structured but much unstructured

Question 3

What is the fourth V

Answer 3

Veracity
Is data true ? Can it be relied upon

Question 4

What is data mining ?

Answer 4

Analysing data to identify patterns and establish relationships such as associations sequences and correlations

Question 5

What is Predictive analytics

Answer 5

A type of data mining which aims to predict future events. Like the chance of someone being persuaded to update a flight

Question 6

What is text analytics

Answer 6

Scanning tests such as emails and word docs to extract useful information

Question 7

What is statistical analytics

Answer 7

Used to identify trends, correlations and changes in behaviour

Question 8

What are the dangers of big data

Answer 8

Cost

Regulation

Loss and theft of data

Incorrect data (veracity)

Employee monitoring - snooping on employees