What is a data model? Discuss the main types of data models.
What will be an ideal response?
An integrated collection of concepts for describing and manipulating data, relationships between data, and constraints on the data in an organization.
Object-based data models such as the Entity-Relationship model Record-
based data models such as the relational data model, network data model, and hierarchical datamodel Physical data models describe how data is stored in the computer
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Function MySQLdb.connect and Cursor method execute raise an________exception when they fail.
a) MySQLdb.DatabaseError. b) MySQLdb.OperationalError. c) MySQLdb.DBError. d) None of the above.
What is the norm today for the number of pairs in UTP cabling?
A. 2 B. 4 C. 25 D. 8
A computer-based file containing employee information would be represented on a data-flow diagram as a(n):
a.data store. b.data flow. c.process. d.source. e.predecessor.
Critical Thinking Questions Case 8-1 ? Mark is a fitness trainer and uses a webpage that maintains his list of client information and training schedules. Mark's webpage maintenance in charge, Jenny, has been asked to use tables instead of bulleted lists to keep track of all the data in an organized and clear manner. ? Identify the format used by Jenny to enter starting and ending table row tags with the following table data elements: Monday, Ben, and Cardio?.
A. ? Monday Ben Cardio B. ? C. ? Monday Ben Cardio D. ? Monday Ben Cardio