12. In a book store, a customer who wants to buy a book asks the assistant if a copy of the book is available. The assistant then checks if the book is available by searching for the book title in the store’s book catalogue. In that scenario, with the help of DFD symbols, what can the ‘book catalogue’ be categorized as? A. External entity B. Data store C. Data flow D. Process

12. In a book store, a customer who wants to buy a book asks the assistant if a copy of the book is available. The assistant then checks if the book is available by searching for the book title in the store’s book catalogue. In that scenario, with the help of DFD symbols, what can the ‘book catalogue’ be categorized as? A. External entity B. Data store C. Data flow D. Process

Principles of Information Systems (MindTap Course List)

12th Edition

ISBN:9781285867168

Author:Ralph Stair, George Reynolds

Publisher:Ralph Stair, George Reynolds

Chapter5: Database Systems And Applications

Section: Chapter Questions

Problem 4PSE: Using a graphics program, develop an entity-relationship diagram for a database application for an...

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Concept explainers

Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

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12. In a book store, a customer who wants to buy a book asks the assistant if a copy of the book is available. The assistant then checks if the book is available by searching for the book title in the store’s book catalogue. In that scenario, with the help of DFD symbols, what can the ‘book catalogue’ be categorized as?
A. External entity
B. Data store
C. Data flow
D. Process

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