Debug support mechanism is used for
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Fault finding only
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Fault Corrections only
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Fault finding and fault corrections
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Load shifting
Debug support mechanisms serve dual purposes: identifying problems (fault finding) and implementing corrections (fault corrections). Options A and B are incomplete, each describing only one half of the debugging process. Option D (load shifting) is unrelated to debugging functionality.
Debug support mechanisms are the tools/facilities (debuggers, monitors, trace and emulation hardware) that assist an engineer through the debugging process, which consists of two linked activities: fault finding (diagnosis/localization - determining where and why a defect occurs) and fault correction (fixing the code or design once the cause is known). Breakpoints, watchpoints, register/memory inspection, and step-execution are used across both phases: they help pinpoint the faulty logic first, and then let the engineer verify a fix once applied. Restricting debug support to 'corrections only' is inconsistent with how debugging tools function - their primary value is locating the fault; without that diagnosis step there is nothing to correct. 'Load shifting' is unrelated to debugging altogether. The complete and standard scope is 'fault finding and fault corrections.'