System Analysis and Design
The four icons used in building Data Flow Diagram are

Flow, Source, Store, Process
Flow, Process, Source/Destination, Store
Flow, Process, Source, Store
Source, Process, Destination, Store
None of these

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System Analysis and Design
Reverse video is a technique of

hiding confidential data on the screen
showing data upside down on the screen
showing data with half brightness
emphasizing data by reversing the foreground and background
None of these

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System Analysis and Design
Sequential or series testing is

testing changes made in an existing or a new program
running the system with line data by the actual user
is checking the logic of one or more programs in the candidate system
making sure that the new programs do in fact process certain transactions according to Specifications

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