問70
頻出度★☆☆
OS に関する記述のうち, 適切なものはどれか。
平成25年度 秋期 ITパスポート試験 問70
テクノロジ系ソフトウェア › オペレーティングシステム
This question's explanation and your answers so far.
解説
問 70
- ア
正解 Choice ア is correct. An OS (basic software) is software installed on an auxiliary storage device such as a hard disk, and by dividing the storage device of a single PC into partitions, for example, several OSs can be installed at the same time. This setup is called multiboot (dual boot). When the PC is powered on, the boot loader (the startup program) presents a list of OSs that can be started, so the user can choose the OS they want to use and boot it each time. Therefore the statement in ア, “Multiple OSs can be installed on a single PC, and the OS can be selected at startup,” is an appropriate description of an OS.
Incorrectイ
Incorrect. An OS is not an application program; it is basic software that stands between the hardware and applications and manages resources such as memory, the CPU, input/output devices, and files. Also, it does not stop after startup. It stays resident in main memory until the PC is powered off and keeps operating in response to requests from applications. Both points, calling it an “application” and saying it “stops functioning after startup,” are wrong.
Incorrectウ
Incorrect. Having a GUI (graphical user interface) is not a requirement for an OS. OSs that offer only a CUI (character user interface), in which commands are typed as text, and server-oriented configurations are also widely used, and even an OS with a GUI can be operated by typing commands as well. The assertion that an OS “must have a GUI and that all operations are performed through that interface” is wrong.
Incorrectエ
Incorrect. The source an OS starts from is not limited to a hard disk drive. Besides an SSD, it can also be started from external storage devices such as optical discs (CD/DVD) and USB flash drives, and even over a network, and the priority order of boot devices can be specified in the BIOS/UEFI settings. The restriction “only from a hard disk drive” is wrong.
ここがポイント
- An OS (basic software) is resident software that mediates between hardware resources and applications and manages them; it is neither an application program nor a program used only for startup.
- A configuration in which several OSs are installed on one PC and chosen at startup is called multiboot (dual boot), and the boot device can also be selected from a variety of options such as HDD/SSD, optical disc, USB flash drive, and network.
用語