System Analysis and Design
The Turnaround is

a program statement that violates one or more rules of the language in which it is written
the key information of programming
None of these
a group of related fields
the elapsed time between the receipt of the input and the availability of the output

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System Analysis and Design
A square symbols

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

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