1.1.1.5 Flag Values

Flag values represent certain status.

1. What does red traffic light suggest ?
2. What does glowing red light on operation room represent?
3. what does glowing break light of the vehicle represent ?

In computer flag takes one bit memory. It can store either 0 or 1. it means either True of flase.
for example device read only or not , device is being used or not, file is being used or not etc.

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2.3.2 Essential & Non-essential data

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