Question
Statement evaluation. Specify whether each statement below is (i) always true, (ii) sometimes true, or (iii) never true. For those that are (ii) sometimes true,
Statement evaluation. Specify whether each statement below is (i) always true, (ii) sometimes true, or (iii) never true. For those that are (ii) sometimes true, explain when the statement is true.
a. A context diagram does not include data stores.
b. A database table in 2NF is in 3NF as well.
c. A salesperson is an external entity in a data flow diagram.
d. Data flow diagrams are better than flowcharts for documenting accounting information systems.
e. Database forms can be used to look up information in a table.
f. Database queries store instructions, not data.
g. Database tables are needed for processes, external entities, and data stores in a DFD.
h. Database tables in 3NF are, by definition, also in 1NF and 2NF.
i. Decomposing a process numbered 2.0 would lead to numbers like 2.1, 2.2, and so on.
j. Lines in a data flow diagram should be labeled with verb phrases to show the movement of data.
Step by Step Solution
3.30 Rating (159 Votes )
There are 3 Steps involved in it
Step: 1
a sometimes true Context diagrams are used to provide a highlevel overview of a system They show the relationships between the different elements in a system but dont provide much detail about individ...Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started