Automation System
The main activity(ies) of Designer in CAD is/are:

Application of creativity, ingenuity, and experience.
Organisation of design information
Control of the design process in information distribution.
None of these
All of these

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Automation System
A flip-flop:

is a sequential logic device
is a combinational logic device
remembers what was previously stored in it
None of these
(a) and (c)

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