Final answer:
The correct answer is option d, which states that a Point of Sale system reading a UPC code is an example of an OLTP system.
Step-by-step explanation:
The correct answer is option d. A Point of Sale (POS) system that reads a UPC code is an example of a use of structured data from an Online Transaction Processing (OLTP) System. OLTP systems are designed to handle and manage transactional data in real time, facilitating instant processing of day-to-day business operations.
Data in OLTP systems is typically highly structured and stored in relational databases rather than NoSQL databases, which are more commonly used for unstructured or semi-structured data.
Meanwhile, option a is incorrect because OLTP systems generally do not batch transactions to process once a day; instead, they handle transactions individually and immediately.
Option b is not generally true either, because structured data from OLTP systems is usually kept in relational databases which are optimally designed for quick, complex queries and transaction integrity.
Option c is also incorrect because OLTP systems predominantly involve structured data rather than unstructured data.
The correct answer is option d. A structured data from an Online Transaction Processing System typically involves unstructured data about 80% of the time. This means that the data is not organized into a predefined format and can vary in its structure and content.
Transactions from an Online Transaction Processing System are usually stored in a SQL (Structured Query Language) database, rather than a NoSQL database as stated in option b. SQL databases are commonly used for structured data, where the data is organized into tables with predefined columns.
Option c is incorrect because it states that data is batched and transactions are created once a day. However, Online Transaction Processing Systems process transactions in real-time, as they occur, rather than in batches once a day.
Option e is incorrect because it refers to a Point of Sale (POS) system that reads a UPC code. While this is an example of a transaction that can be processed by an Online Transaction Processing System, it does not describe the nature of the structured data from such a system.
OLTP systems handle transactional data in real time and are characterized by structured data stored in relational databases.