Big Data

Question 1

Big data

Answer 1

A term used to describe data that doesn’t fit the usual containers

Question 2

Features of big data

Answer 2

• Volume
• Velocity
• Variety

Question 3

Volume

Answer 3

• There is too much data to fit on a single server
• Data must be stored over multiple servers

Question 4

Velocity

Answer 4

• Data on the servers is created and modified rapidly
• Response times must be in milliseconds

Question 5

Vareity

Answer 5

Data held on the servers consist of many different types of data

Question 6

Analyzing big data

Answer 6

There is a lack of structure, requiring machine learning techniques to discern patterns

Question 7

Functional programming in big data

Answer 7

Functional programming is used as:
- The programs are stateless (no side effects)
- Data structures are immutable
- Supports higher order functions

Question 8

Face-based model

Answer 8

• Each individual piece of information is stored as a fact
• Facts are immutable, overwritten and stored with a timestamp
• Reduces the risk of losing data
• Does not require an index, new data is simply appended to the data set

Question 9

Graph schema for big data

Answer 9

Uses graphs consisting of nodes (entities) and edges (relationships) to represent a dataset