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

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单项选择题

A. dpkg-G
B. apt-get-u
C. dpkg-Dh
D. dpkg-l
E. apt-get-y

单项选择题

What is the output when the following shell script executes？（）
cat<；<；foobar
Hello foobar
foobar

A. The contents of the file foobar.
B. Hello
C. No output but a file named foobar is created.
D. Hello foobar
E. Hello foobar foobar

单项选择题

A. Idconfig
B. Idd
C. libpath
D. newlibs