单项选择题

Which of the following commands will make a new directory?（）

A.cd
B.md
C.dir
D.rd

点击查看答案&解析

上一题目录下一题

相关考题

单项选择题

When replacing a laptop’s hard drive, which of the following may need to be updated?（）

A. The CD drive
B. The network drivers
C. The system OS
D. The system BIOS

单项选择题

Which of the following is a reason why Bob, a technician, should install case fans in the front of acomputer case?（）

A. It forces hot air out of the PC
B. The fan is easier to remove and clean
C. It forces cooler air into the power supply quickly
D. It forces cooler air across the motherboard

单项选择题

When Bob, a technician, powers up a desktop PC, the unit will repeat three short beeps and will not POST. Which of the following is MOST likely the problem?（）

A. The memory is failing.
B. The CPU is overheating.
C. The hard drive is not attached properly.
D. The operating system is not installed.