CompTIA认证考试LX0-101单项选择题每日一练(2019.05.04)

单项选择题
Which system administration command you can use to update Id.so.cache after the installation of new shared libraries？（）
A. Idconfig
B. Idd
C. libpath
D. newlibs
单项选择题
What information is displayed by the command cat/proc/dma？（）
A. whether DMA is enabled
B. which DMA channels are in use
C. which DMA mode is in use
D. general information about DMA on the machine
单项选择题
Which of these commands allows you to use shared libraries that are in /usr/local/lib？（）
A. export LD_PRELOAD=/usr/local/lib
B. export LD_LIBRARY_PATH=/usr/local/lib
C. Idconfig /usr/local/lib
D. Idd/usr/local/lib
单项选择题
You are running Linux 2.0.36 and you need to add a USB mouse to your system. Which of the following statements is true？（）
A. You need to rebuild the kernel.
B. You need to upgrade the kernel
C. You need to load the USB modules for your existing modular kernel.
D. USB support is not available in Linux.
单项选择题
You have just added a CD.ROM drive （/dev/hdd） to your system and have added it to yourfstab. Typically you can use which of the following commands to mount media in that drive to /mnt/cdrom？（）
A. mount /dev/cdrom /mnt/cdrom
B. mount/dev/cdrom
C. mount -t cdrom /dev/cdrom /mnt/cdrom
D. mount /mnt/cdrom
E. automount /mnt/hdd /mnt/cdrom