After a baseline check was completed it was noted that the network was working far below the level of the last baseline. Which of the following should the technician do NEXT to determine where the network problems are occurring?（）
A、Upgrade the firmware on all routers and switches
B、Reboot the entire network one device at a time
C、Conduct a network traffic analysis
D、Rerun the baseline to ensure the results were correct
有关UNIX的下列说法中，（）是错误的.
A、0进程常驻内存且在核心态运行
B、进程调度采用时间片轮转算法
C、父进程与子进程可以共享由父进程打开的文件
D、仅当进程处于睡眠状态时才能把它换出到磁盘上
E、一个进程终止时先处于僵死状态，等待父进程作善后处理
Click the Exhibit button. What is the output if the main（ ） method is run?（）
A、 4
B、 5
C、 8
D、 9
E、 Compilation fails.
F、 An exception is thrown at runtime.
G、 It is impossible to determine for certain.
下列符号中不属于C++关键字的是（ ）。
A、friend
B、namespace
C、continue
D、byte
STMN的复用方式是（）。
A、字节间插
B、比特间插
C、间插
D、统计复用
下列字符串中可以用作C++标识符的是（ ）。
A、2009var
B、goto
C、test-2009
D、_123