Big Data Flashcards
1
Q
Big Data Def
A
Data that cannot fit in the usual containers
2
Q
Three defining features of BD
A
Volume
Velocity
Variety
3
Q
Volume
A
Too much data for a single server
4
Q
Velocity
A
Data is created and modified rapidly, servers need to be updated regularly
5
Q
Variety
A
Many different types data eg text, multiment
6
Q
Hardest thing about Big Data and why?
A
Lack of structure
Hard to analyse, doesn’t conform to row-column nature of DB
Hence ML methods needed to extract useful data
7
Q
Functional Programming
A
Functional programs use immutable data structures
Makes it easier to write efficient code, with multiple servers
8
Q
Facts based model contains…
A
…Contains info piece and timestamp
9
Q
Why contain a timestamp in a facts based model?
A
The most recent fact will be retrieved
