What is static data and Dynamic data?

Question

I am currently doing ETL testing. My manager has asked me to learn difference between static data and dynamic data. Can you give me difference between static data and dynamic data with example?

Answer 1

Static data:

A static data structure is an organization or collection of data in memory that is fixed in size. This results in the maximum size needing to be known in advance, as memory cannot be reallocated at a later point. Arrays are a prominent example of a static data structure.

src: http://www.webopedia.com/TERM/S/static-data-structure.html

Static data are more like an informative data

Dynamic data:

A dynamic data structure (DDS) refers to an organization or collection of data in memory that has the flexibility to grow or shrink in size, enabling a programmer to control exactly how much memory is utilized.

src: http://www.webopedia.com/TERM/D/dynamic-data-structure.html

Dynamic data is the one which changes frequently like transactional data.

Example,

In HRM (Human Resource Management System) of the company, Employee information like Name, DOB, Address, Phone number, Blood Groop, etc are static data.

Employee leaves logs, biometric punch-in, and punch-out data are called dynamic data or transactional data.