Differentiate between drivers and stub
Stubs
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Drivers
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Stubs are dummy modules that always used to simulate the low level modules.
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Drivers are dummy modules that always used to simulate the high level modules.
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Stubs are the called programs.
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Drivers are the calling programs.
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Stubs are used when sub programs are under construction.
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Drivers are only used when main programs are under construction.
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Stubs are used in top down approach.
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Drivers are used in bottom up integration.
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