A file named "core" exists in the current directory.  Which of the following commands should be used to determine what created the "core" file?（）

单项选择题Whichofthefollowingoptionsindicateswhyitisimportanttotalktotheuserandaskappropriatequestionsaboutasoftwareproblem?（）

A.Software problems don't generate errors. 
B.The user is more knowledgeable about software. 
C.The system logs will provide useful information alone. 
D.Key information pertaining to the software may be uncovered.

单项选择题To examine the Exhibit, press the Exhibit button. Using the information provided in the exhibit, which of the following options indicates the date and time that the file system ran out of room?（）

A.Mon Mar 20 14:01:00 
B.Sun Mar 19 18:40:00
C.Fri Feb 20 12:28:00 
D.Wed May 04 03:19:10

单项选择题Ausertriestoftpa3gigabytefiletoanAIXmachineatcertaintimesduringtheday.Thefiletransferfailsatexactly2,147,483,584byteseachtime.AllofthefollowingareprobablecausesofthefailuresEXCEPT:（）

A.AIX has not been updated to V4
B.fsize in /etc/security/limits file has not been set to -1
C.ftp can only transfer files > 2 gig in binary mode
D.The filesystem is not large-file enabled

单项选择题ANetworkEngineerisreportingthatoneoftheAIXhostsisgeneratingtoomuchICMPtraffic,whichisslowingthenetwork.Whichofthefollowingoptionsisthemostprobablecause?（）

A.A large FTP job is in process. 
B.A network interface was misconfigured. 
C.The ping command is being used excessively. 
D.A bad network interface card and/or network cable is in use. 

单项选择题Whichofthefollowingreasonsindicatewhyitisimportanttohavetheuserdemonstratethetasktheyaretryingtoperform?（）

A.To help the technician learn how to perform the task 
B.To determine if the user is performing the task properly 
C.To determine if the user is authorized to perform the task 
D.To help the technician determine if there is a better way to perform the task in question