Name four attributes that you can use to define a data flow in the grocery inventory information system
What will be an ideal response?
Typical attributes used to define data flows are:
• Data flow name or label: The data flow name as it appears on the DFDs.
• Alternate name(s): Aliases for the DFD data flow name(s).
• Description: Describes the data flow and its purpose.
• Origin: The DFD beginning, or source, for the data flow; the origin can be a process, a data store, or an external entity.
• Destination: The DFD ending point(s) for the data flow; the destination can be a process, a data store, or an external entity.
• Record: Each data flow represents a group of related data elements called a record or data structure. In most data dictionaries, records are defined separately from the data flows and data stores. When records are defined, more than one data flow or data store can use the same record, if necessary.
• Volume and frequency: Describes the expected number of occurrences for the data flow per unit of time.
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File systems provide access to native files as well as to files from other mounted file systems. What types of files might best be stored in the native file system?
What will be an ideal response?
Display all employees with their commission value. Display 0 commission for employees who do not get any commission.
Write queries for the following. (Use tables created in Chapter 4 Lab Activity.)
You can press the ____ key to preview the animation in a Web page in your computer's default browser.
A. F B. F6 C. F12 D. Esc
Excel displays a series of ________ to indicate that the column width is too narrow to display entire cell contents
A) pound signs # B) exclamation marks ! C) asterisks * D) ampersands @