OS - 题库学习平台

Generally, it is impossible to prevent denial-of-service attacks

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Biometric devices are currently too large and expensive to be us

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Spyware is not considered a crime in most countries.

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It is easier to protect against malicious misuse than against ac

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Most systems use a combination of access lists and capabilities.

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A capability list associated with a domain is directly accessibl

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An access matrix is generally dense.

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Domains may share access rights.

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STREAMS I/O is asynchronous except when the user process communi

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Although caching and buffering are distinct functions, sometimes

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A dedicated device cannot be used concurrently by several proces

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A maskable interrupt can never be disabled.

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An expansion bus is used to connect relatively high speed device

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In general, LOOK disk head scheduling will involve less movement

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Data striping provides reliability for RAID systems.

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RAID level 0 provides no redundancy.

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Windows allows a hard disk to be divided into one or more partit

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LOOK disk head scheduling offers no practical benefit over SCAN

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In most RAID implementations, a hot spare disk is not used for d

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Solid state disks (SSDs) commonly use the FCFS disk scheduling a

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