Exam 7: Structuring System Requirements: Conceptual Data Modeling
Exam 1: The Systems Development Environment106 Questions
Exam 2: The Sources of Software100 Questions
Exam 3: Managing the Information Systems Project94 Questions
Exam 4: Systems Planning and Selection94 Questions
Exam 5: Determining System Requirements104 Questions
Exam 6: Structuring System Requirements: Process Modeling104 Questions
Exam 7: Structuring System Requirements: Conceptual Data Modeling102 Questions
Exam 8: Designing the Human Interface105 Questions
Exam 9: Designing Databases311 Questions
Exam 10: Systems Implementation and Operation105 Questions
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An entity instance is a single occurrence of an entity type.
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True
Employee identification number, name, address, and skill are examples of attributes.
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True
Analysts should use intelligent keys as identifiers.
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False
Processes, rather than data, are the most complex aspects of many modern information systems.
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If each employee can have more than one skill, then skill is referred to as a:
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In order to determine security controls and understand who really knows the meaning of data, an analyst might ask, "What natural activities or transactions of the business involve handling data about several objects of the same or different type?"
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Which of the following is a True statement regarding midrange alternatives?
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Conceptual data modeling for an Internet-based electronic commerce application differs significantly from the process followed when analyzing the data needs for other types of applications.
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An identifier is a candidate key that has been selected as the unique, identifying characteristic for an entity type.
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The number of entity types that participate in a relationship refers to:
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Which of the following types of alternatives represent compromise solutions?
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One way to handle repeating data within an entity is to separate the repeating data into another entity, called a weak entity.
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The characteristics of data captured during data modeling are crucial in the design of databases, programs, computer screens, and printed reports.
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Conceptual data modeling is typically done in parallel with other requirements analysis and structuring steps during:
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A ternary relationship is a relationship between instances of one entity type.
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Gathering the information you need for data modeling by reviewing specific business documents handled within the system describes the:
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An analyst would ask, "What must we know about each object in order to run a business?" in order to determine relationships, their cardinality, and degrees.
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Cardinality is the number of instances of entity B that can (or must) be associated with each instance of entity A.
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The alternative that goes beyond simply solving the problem in question and focuses instead on systems that contain many extra features users may desire is referred to as a:
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On an entity-relationship diagram, a rectangle represents a(n):
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