Data Flow Diagrams

question 23

Multiple Choice

Data flow diagrams:

• A) Help users understand a system.
• B) Are important forms of internal control in all accounting information systems.
• C) Eliminate the need for data normalization.
• D) Are more useful than flowcharts.

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Definitions:

Nonvolatile Storage

Permanent storage, as in read-only memory (ROM).

RAM Memory

Volatile computer memory where data can be read and written, used for storing the operating system, application programs, and data in current use.

Read/Write Head

A component of a disk drive, such as a hard drive, that reads data from and writes data to the disk.

Mechanical Hard Disk

A data storage device that uses mechanical platters and a moving read/write head to access data.