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计算机考试 | CompTIA认证考试

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单选题 Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?()

A

 chmod 557 /bin/foo

B

 chmod o+rwx.a+rx/bin/foo

C

 chown 557 /bin/foo

D

 chmod 755/bin/foo

单选题 You ran out of space and added a eighth disk to your SCSI-1 system. When you try to start, the system no longer boots. What is most likely the cause of this problem?()

A

 SCSI-1 supports only 8 devices including the adaptor.

B

 SCSI-1 supports only 6 disks per adaptor.

C

 There is a SCSI-ID conflict that causes that problem.

D

 You forgot to set the SCSI-ID #8 for the new disk.

单选题 You have run out of disk space on a partition. Which of the following would be an easy way to move data to a new partition without reconfiguring the path to the data in existing applications?()

A

 Run ext2fs ACL.

B

 Use a hard link.

C

 Use a symbolic link.

D

 Use the loopback device.

E

 Create a block device offset.

单选题 What is the difference between thE.remove and thE.purge action with the dpkg command?()

A

 -remove removes the program, -purge also removes the config files

B

 -remove only removes the program, -purge only removes the config files

C

 -remove removes a package, -purge also removes all packages dependent on it

D

 -remove removes only the package file itself, -purge removes all files related to the package

单选题 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

单选题 The command echo $! will produce what output?()

A

 the process id of last background command

B

 the exit status of the last command

C

 the exit status of the last background command

D

 the process id of the current shell

E

 the name of the command being executed

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