IGCSE Computer Science Paper-1: Specimen Questions with Answers 113 - 114 of 164

Question number: 113

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Explain two causes of system failure.

Explanation

A Computer system may fail due to the hardware failure. This may result in freezing of the system, reboot of the system or even a total function stop. Due to software issues also a computer system may fail. Fluctuation of voltages resulting in disruption of electric power may also lead to a system failure. During disruption of electric power it has been noted that motherboard gets damaged and as it holds many of the crucial components including CPU, they may also get damaged.

Question number: 114

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Differentiate between Hardware RAID and Software RAID.

Explanation

Hardware RAID: RAID as hardware (controller card or chip) can be deployed by Storage administrators.

Two hardware RAIDS can be deployed RAID Controller Card and RAID-on-Chip.

RAID Controller Card are expensive being independent of the host. The all RAID operations are offloaded from the CPU to the dedicated card.

RAID-on-Chip: The host interface is being integrated by a single chip on the motherboard.

Software RAID: The RAID services from the host is being delivered Software-based RAID. There are two forms pure software being run from the OS and hybrid software which is responsible for relieving the load on the CPU.

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