11. Big Data AQA A-Level Computer Science

Which of the three Vs of big data describe that the data consist of many different types of data?

Variety

Define big data.

A catch-all term for data that won't fit the usual containers.

How is useful information extracted from big data?

By using machine learning techniques to discern patterns in the data.

Which programming paradigm is well suited to processing big data?

Functional Programming

List the three Vs of big data.

1. Volume

2. Velocity

3. Variety

Which property of data structures in functional programs means that their value doesn't change after instantiation?

Immutability

Why can't big data be stored using conventional databases?

Conventional databases require data to conform to a row and column format.

What represents relationships between entities in graph schema?

Arrows

What is the most challenging aspect of big data?

The data's lack of structure.

Which property of functional programs means that they have no side effects?

Statelessness

Using the fact-based model, how can a computer ensure that it uses the most recent available information?

Compare the timestamps of the facts.

Which three features of functional programs make it easier to write correct, efficient, distributed code?

1. Statelessness

2. Immutability

3. Support for higher-order functions

What is represented by nodes in graph schema?

Entities