Section 12 - Big Data

Question 1

What are the 3 aspects of Big Data?

Answer 1

• Volume: It is too big to fit on a single server
• Velocity: It should take milliseconds or seconds to respond, particularly with streamlined data
• Variety: The data may be in many forms

Question 1

What is the key issue with Big Data?

Answer 1

It lacks structure, meaning data can not be organised into a relational database and it is impossible to use standard query tools

Question 2

What does Big Data collection and processing allow us to do?

Answer 2

Detect and analyse relationships within and among individual pieces of information

Question 3

What is the best programming paradigm to use with Big Data?

Answer 3

Functional programming

Question 4

What are the advantages of functional programming?

Answer 4

• There are no side effects
• They allow for higher order functions
• Variables are immutable

Question 5

What are fact-based models?

Answer 5

An alternative to the relational data model in which immutable facts are recorded with timestamps. This means that data is never deleted and the data set is always growing

Question 6

How do graph databases work?

Answer 6

Data is stored in nodes and relationships, with them each having properties. They can be used to represent connected data and to perform analysis on very large datasets