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Online Data Modeling Skills Test

Topics Covered

  • The Entity-Relationship Model
  • Introduction to Database Technology
  • Data Modeling Techniques
  • Database Lifecycle
  • Data Objects
  • Data Warehouse Trends
  • OLTP and OLAP
  • Business Intelligence

Useful for hiring

  • Data Modeler
  • Data Analyst
  • Data Scientist
  • Data Engineer

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Capacity Manager
Question

The table below shows a relationship for Prince University student database:



As a user and administrator of the prince university database and certain information are required from you from the database. Which is less likely viable?

Answer
    • The user of the database should be able to ask for a list of courses taken by a specific student

    • Ask for a list of students currently enrolled in a specific course

    • Ask for a list of students currently enrolled in all courses

    • Ask for a list of students not enrolled in all the courses

Question

As a consultant, you are asked to implement a cost-effective BI tools for your company and you are indecisive as to the best and efficient choice to deploy between traditional BI softwares like MicroStrategy, Business Objects, IBM Cognos and Oracle on the one hand and Open source BI tools, on the other hand, what will be the determinant/deterrent to your choice?

Answer
    • Open Source BI tools are more flexible in use and can be altered to easily fit user demand

    • It is more difficult to find consulting help if you go with open source BI

    • Traditional BI tools are more complex and strategic in implementation

    • There are a lot of people with traditional BI skills

Question

If the system is satisfying user needs, users will naturally use the system. If not, users will abandon the system, and a data warehousing system with no users is actually a detriment to beck technologies (since resources that can be deployed elsewhere are needed to maintain the system). Therefore, it is very important to have a tracking mechanism to figure out how much/degree of usage by users accessing the data warehouse. This should not be a problem if:

Answer
    • Third-party reporting/OLAP tools are used, since they all contain this component

    • The right data warehousing investment is made

    • All users are compelled to use the system

    • The beck’s boast an abundant stream of resources ready for deployment

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