Which of the following performance tools will work with optimized code and also provides source statement profiling？（）

A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 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？（）

After issuing the nfsstat -rs command， the null received column starts to grow. This indicates which of the following conditions？（）

Which of the following commands should be used to tune parameters of devices that are displayed with lsattr？（）

Which of the following tools should be used to display the location of unused physical partitions on a disk drive？（）

Which of the following phrases is TRUE regarding monitoring disk I/O with iostat？（）

To examine the Exhibit， press the Exhibit button. Using the "ps -mo THREAD" output as shown in the exhibit， which of the following conclusions is most appropriate to draw？（）

The nice value is 80 in the ps listing.  Which command is used to change this to a value of 100？（）

Which of the following commands should be used to monitor the average number of threads in the scheduler’s run queue for any given interval？（）

Which of the following logical volume placement policies is likely to give the best performance in most cases， all other factors being equal？（）