Which of the following would NOT be considered an FRU? (Choose all that apply)
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NFU Controller
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Hard Drive
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System Board
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RAM Chips
FRU (Field Replaceable Unit) refers to hardware components designed to be easily replaced on-site. Hard drives, system boards, and RAM chips are all standard FRUs. 'NFU Controller' is not a real hardware component (NFU likely implies 'Not a Field Replaceable Unit'), making it the only option that would NOT be considered an FRU.
A Field Replaceable Unit (FRU) is any component that a technician (or in some cases a user) can remove and replace in the field, without shipping the whole system back to a repair depot — classic PC examples are hard drives, RAM modules, power supplies, and system boards (motherboards), all of which are modular, socketed/connectorized parts designed for swap-out. Hard Drive, System Board, and RAM Chips are therefore all standard textbook FRUs, so marking "Hard Drive" as something that would NOT be considered an FRU directly contradicts the accepted definition. By elimination among the four options, the answer that would NOT be an FRU is the remaining, non-standard "NFU Controller" entry — consistent with a soldered/embedded controller chip rather than a field-swappable unit — making it the odd one out relative to the three genuine FRUs.