问题:单选题Which of the following options would best help to reduce packet fragmentation for a TCP application transferring large amounts of data between servers across a path of multiple networks?()AAdjust Path MTU attributes, using the no command.BAdjust the status queue size on the adapters, using the chdev command.CAdjust ipforwarding to enabled, using the no command.DAdjust tcp_maxburst to enabled, using the no command.
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问题:单选题Comprehensive Service Level Agreements typically do not address:()ARoles & responsibilitiesBHeadcount & budgetsCReporting policiesDPenalites
问题:单选题A typical example of a process # 19082 in the /proc file would be: # ls -l /proc/19082 total 0 dr-xr-xr-x 1 root system 0 Sep 15 15:12 . dr-xr-xr-x 1 root system 0 Sept 15 15:12 .. -rw------- 1 root system 0 Sept 15 15:12 as -r-------- 1 root system 128 Sept 15 15:12 cred --w------- 1 root system 0 Sept 15 15:12 ctl dr-xr-xr-x 1 root system 0 Sept 15 15:12 lwp -r-------- 1 root system 0 Sept 15 15:12 map dr-x------ 1 root system 0 Sept 15 15:12 object -r--r--r-- 1 root system 448 Sept 15 15:12 psinfo -r-------- 1 root system 1024 Sept 15 15:12 sigact -r-------- 1 root system 1520 Sept 15 15:12 status -r--r--r-- 1 root system 0 Sept 15 15:12 sysent Writing to which of the following files will allow the owner to stop a process?()AstatusBsysentCctlDas
问题:单选题In AIX 5L and later, the operating system supports the /proc filesystem. What would be the best description of the /proc filesystem?()AIt is a pseudo filesystem that maps processes and kernel data structures to corresponding files.BIt is a JFS mounted filesystem that provides an exact representation of what is happening to a proces at a single and discrete point of time.CIt is a JFS mounted filesystem that maps processes and read-only files related to these processes.DIt is a pseudo filesystem that contains data that represents the state of the parent processes (but not their threads) in a system.
问题:单选题The rmss command provides the facility to run an application over a range of memory sizes and display the performance statistics. How is the simulated memory reset to the real memory of the machine?()Armss -cBrmss -pCrmss -rDrmss -s
问题:单选题Which of the following commands should be used to determine which disk of a system is experiencing a disk I/O performance problem?()AfilemonBistatCvmstatDiostat
问题:单选题While monitoring a system that is CPU bound, which of the following output is most likely to occur?()AABBCCDD
问题:单选题Given the following on a system that is not a name server, which will be the first area searched to resolve a host name to an IP address?() #cat /etc/resolv.conf domain abc.century.com nameserver 192.9.201.1 nameserver 192.9.201.2 #cat /etc/netsvc.conf hosts = bind,nis,local #echo $NSORDER local,bindA/etc/hosts on server 192.9.201.2B/etc/hosts on the local systemC/etc/named.rev on 192.9.201.1D/etc/netsvc.conf on the NIS server
问题:单选题A TCP/IP application receives files from a remote machine. The application reads 32 kilobytes of data at a time to the socket, but has not issued a system call to set the window size. Which of the following procedures should be performed on the personal machine to increase the throughput of the application?()AIncrease the size of thewallBIncrease the size of sb_maxCIncrease the size of tcp_recvspaceDIncrease the size of tcp_sendspace
问题:单选题When a system has both online transaction processing as well as large batch processing, which of the following common procedures will best help to improve system performance?()ABoost the priority of batch jobs.BSchedule batch runs to reduce contention with OLTP.CSchedule OS maintenance such that it includes frequent application of PTFs.DPerform incremental backups of transaction processing and full backups of batch processing.
问题:单选题Which of the following commands is used to adjust the minperm and Maxperm values of real memory to 4% and 80%?()Avmtune -N4 -M80Bvmtune -f4 -F80Cvmtune -l4 -L80Dvmtune -p4 -P80
问题:单选题Which of the following commands can be used to watch system errors as they are logged?()Asmit errptBsmit errdemonCsmit alogDsmit syslogd
问题:单选题Which of the following metrics provided by the iostat report is used to initially determine if a system is I/O bound?()A% idleB% sysC% userD% iowait
问题:单选题Page replacements algorithm steals file pages only when percent of RAM occupied by filepages()Afalls below minperm.Bis between minperm and maxperm.Chigher than maxperm.Dlower than maxperm.
问题:单选题The nice value is 80 in the ps listing. Which command is used to change this to a value of 100?()Arenice 100 {PID}Brenice -n 20 {PID}Crenice --20 {PID}Drenice -n -100 {PID}
问题:单选题Which command series should be used to determine whether file paging or paging space paging is a problem when running a program from an idle system?()Afoo ; lsps -sBtprof -kx ; fooCiostat ; foo ; iostatDvmstat -s ; foo ; vmstat s
问题:单选题Which of the following tools should be used to report in-depth information about file fragments?()AdefragfsBistatCfilemonDfileplace
问题:单选题Which of the following commands displays the number of system calls per second that are being executed?()AsarBpstatCiostatDfilemon
问题:单选题Which of the following procedures WILL NOT increase contiguous free space on a the filesystem /data1, located on /dev/lv01, that is heavily fragmented?()ARun defragfs -r /data1; defragfs /data1BRun defragfs -r /dev/lv01; defragfs /dev/lv01CBack up the filesystem by name, unmount the filesystem, recreate the filesystem by running mkfs /dev/lv01, and restoring the data from the backup.DBack up the filesystem by inode, unmount the filesystem, recreate the filesystem by running mkfs /dev/lv01, and restoring the data from the backup.