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Summary: Enterprise Architecture As Strategy Creating A Foundation For Business Execution | 9781422148174 | Jeanne W Ross, et al
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Read the summary and the most important questions on Enterprise Architecture As Strategy Creating a Foundation for Business Execution | 9781422148174 | Jeanne W. Ross; Peter Weill; David Robertson
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1 Introduction to Zachman Framework
This is a preview. There are 20 more flashcards available for chapter 1
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What is a database?
a structured set of data. It is a combined set of tables. For example (Netflix) account_t or profile_t. SQL is the language for databases. It reads the tables and provides a result. -
What is the difference between RAM and hard disk?
- RAM is in-memory and temporarily. If you plug-out, the data disappears. A hard disk has a database. If you plug-out it’s still saved.
- RAM is in-memory and temporarily. If you plug-out, the data disappears. A hard disk has a database. If you plug-out it’s still saved.
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name some Database management systems:
Excel ,mySQL ,Microsoft Access, Word
The problem withExcel is that you need to load the entire table to access one record --> takes a lot of time.
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What is a flowchart and where is it used for?
It’s hard to understand a code written by another program. Therefore,programmers communicate inflowcharts . These are language independent.
Purpose offlowcharts : visualize what is going on in a program. Why? For communication and understanding.
User View (command line)Developer View (C-language )Designer View (language-independent ) Shown on the left -
What is a primary key?
the unique identifier for a table (for example student ID). It must be unique. -
When do you use a logical data model (relational model)
When you want to communicate, but do not want it to be program dependent -
What is a conceptual model?
cares about the design. This is higher level data model and is easier to understand for a customer. However, you cannot see which tables Netflix uses. -
Difference between use-case and activity digram?
Both system and business use-case diagrams provide a bird vies. While both system and business activity diagrams provide huge detail. -
When are there no differences between system and business diagrams
For example Netflix, this is a digital company.
All of their activities are in the systems -
How to transform a business diagram to a system diagram.
You have to remove information (physical information)
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