System Analysis and Design
A common reason for changing an information system is

problems in the existing system
All of these
None of these
new requirements
new technology

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System Analysis and Design
A square symbols

is a data store-data at rest, or a temporary repository of data
None of these
identifies data flow
defines a source or destination of system data
represents a process that transforms incoming data flow(s) into outgoing data flows

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System Analysis and Design
Top-down programming is

a series or group of components that perform one or more operations of a more complex system
an approach in which the top module is first tested then program modules are added from the highest level to the lowest level
a group of related fields
a map of the programmer's view of the data

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