单项选择题 Malware is removed and a computer is rebooted. Later, the malware is found on the computeragain. Which of the following would permanently solve this problem?（）

单项选择题 A floppy drive is replaced in a computer and now when the computer is turned on the floppy drive light is constantly lit. Which of the following is the MOST likely cause?（）

单项选择题 A mirrored set is another name for which of the following?（）