Describe a boot sector virus.
What will be an ideal response?
Boot sector virusesposition their code in the boot sector of a computer's hard disk so that when the computer boots up, the virus runs in place of the computer's normal system files. Boot sector viruses are commonly spread from external storage devices to hard disks. Boot sector viruses vary in their destructiveness. Some merely display a screen advertising the virus's presence when you boot the infected computer. Others do not advertise themselves, but stealthily destroy system files or make it impossible for the file system to access at least some of the computer's files. Examples of boot sector viruses include Michelangelo and the Stoned virus, which was widespread in the early 1990s (in fact, it disabled U.S. military computers during the 1991 Persian Gulf War) and persists today in many variations. Until you disinfect a computer that harbors a boot sector virus, the virus propagates to every external disk to which that computer writes information. Removing a boot sector virus first requires rebooting the computer from an uninfected, write-protected disk with system files on it. Only after the computer is booted from a source other than the infected hard disk can you run software to remove the boot sector virus.
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Which of the following is not true about how companies use Twitter to help generate business?
A) Blizzard's Twitter feed informs users of game outages and problems. B) Twitter can be used to help consumers feel like they have a personal connection to a company. C) Companies such as Starbucks have Twitter accounts and respond to customers as if they are just another friend. D) Any company with a Twitter account will pay users to tweet an advertisement for them.
Which of the following is not a part of a server like the one in the accompanying figure?
A. processor B. network connections C. storage D. bundled software