单项选择题

Which of the following can be hot-swappable?（）

A. Hard drive
B. Tape drive
C. Floppy drive
D. DVD-RW

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单项选择题

The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）

A. Power supply has blown.
B. CPU fan is faulty.
C. Motherboard has overheated and shutdown.
D. UPS has been tripped.

单项选择题

Hyperthreading technology:（）

A. only works on computer systems with multiple core CPUs.
B. enables a processor to work with two independent computer instructions at once.
C. enables two independent processors to work on the same task, simultaneously.
D. allows a computer program to work on multiple tasks simultaneously.

单项选择题

Which of the following devices would MOST likely require a serial adapter to be installed on amodern PC?（）

A. External modem
B. TV tuner
C. Mouse
D. Keyboard