A215 - Big Data

Question 1

Big Data can be described in terms of 3 Vs. List all 3 and define each one.

Answer 1

• Volume - Capacity to store it exceeds a single server.
• Velocity - Data is produced/processed at high speeds.
• Variety - Data can appear in many different forms.

Question 1

What is Big Data?

Answer 1

A large quantity of unstructured data

Question 2

In a fact-based model what is the definition of a fact?

Answer 2

A fact is a piece of data that cannot be deconstructed further and is timestamped.

Question 3

What are the 3 components of graph schema?

Answer 3

• Nodes - Represent core entities
• Edges - Represent connections between entities
• Properties - Represent information about entities

Question 4

Describe the 3 characteristic of functional programming that make it good for Big Data.

Answer 4

• Immutable data structures - Elements cannot be changed, removed, or added. Adding items creates a new list, leaving the original unchanged.
• Statelessness - Program has no subroutines or variables so execution is very deterministic and can be replicated on many different systems with identical results.
• Higher-order functions - Functions can be run in parallel systems safely because the process doesn’t disturb other parts of the dataset.