Summary Enterprise Architecture As Strategy Creating a Foundation for Business Execution Book cover image

Summary Enterprise Architecture As Strategy Creating a Foundation for Business Execution

- Jeanne W Ross, et al
ISBN-10 1422148173 ISBN-13 9781422148174
151 Flashcards & Notes
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A snapshot of the summary - Enterprise Architecture As Strategy Creating a Foundation for Business Execution Author: Jeanne W Ross Peter Weill David Robertson ISBN: 9781422148174

  • 1 Introduction to Zachman Framework

  • 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. 



  • name some Database management systems:



    • Excel, mySQL, Microsoft Access, Word
      The problem with Excel is that you need to load the entire table to access one record --> takes a lot of time.
  • What is a flowchart and where is it used for?



    It’s hard to understand a code written by another program. Therefore, programmers communicate in flowcharts. These are language independent.
    Purpose of flowcharts: 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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