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Advance Computer Architecture:
What does that mean?
As we have seen in the above example that our non-software systems could be malfunctioned or crash while working. That means they are affected by the phenomenon of wear and tear. They have a particular life and after that, they could have some problems and may not
behave and perform as expected. But this is not the case with software. Software systems do not affect by the phenomenon of wear and tear. Similarly
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That means if the software is not working then it should not work from the very first day. But this could not be the case that at a particular point in time software is functioning well and after some time the same software is not performing the same task as required.
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If the software has any defect then that defect will be there from the very first day and that defect is normally called a bug. So software does not have the element of wear and tear. Let’s elaborate on this point further. We have just talked about software defects which we call bugs. If a part of a car became worn out you just need to get a new one from the market and replace the damaged one with the new one. And the car will start working properly as it was working previously.
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if an electric bulb got fused then you just need to get a new one and put it into the socket in place of the fused one and your room will again be illuminated. But the case of software is somewhat different. If the software has a bug then the same process of replacing a faulty
part with the new one may not work.