Mac OS X Support Essentials v10.4 Exam", the full name of 9L0-401 exam, is a Apple certification.
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1.A user reports that USB devices intermittently stop responding when
connected to his PowerBook, but work properly when connected to another Macintosh. Which step would be MOST LIKELY to help you isolate the source of the problem?
A.Launch Activity Viewer and watch to see if any device drivers stop responding.
B.Disconnect all non-USB devices to reduce power consumption on his computer.
C.Restart his computer in verbose mode to see if the USB kernel extension is loading.
D.Unplug all his USB devices, then reconnect and test following a split-half search method.
Correct: D

2.Your Macintosh has been exhibiting system problems, so you need to perform troubleshooting and maintenance. Which two tasks can you execute from another Macintosh after booting your system in FireWire Target Disk Mode? (Choose TWO.)
A.Run Repair Disk from Disk Utility.
B.Run Repair Disk Permissions from Disk Utility.
C.Partition drive (non-destructive) from Disk Utility.
D.Run Secure Erase from Disk Utility to defragment the drive.
E.Enable System Administrator (root) login in NetInfo Manager.
Correct:A B