SO2{“version”:”1.1″,”math”:”SO2″}

NH3{“version”:”1.1″,”math”:”NH3″}

The following sed command will individually redact all credit card numbers found on each line of the input stream. These numbers will appear in the format of most major CC numbers (e.g., sixteen digits divided into four hyphen-delimited groups of four digits each). Further, any data not matching this format should be left unmodified (i.e., no false positives are allowed). Assume sed was executed using the -E or -r switches.  

It is possible for a call to waitpid(-1, &chldstat, WNOHANG) to block and wait indefinitely.

If the standard error stream is connected to the terminal then writes, by default, do not utilize buffering.

In general, what is the maximum possible write size to a FIFO or pipe?

Processes often use named pipes to communicate with each other when these processes are not directly related to one another.

It is considered invalid or erroneous to lseek() to a position beyond the end of a file, then attempt to write to this location.

What type of change is wood burning in a fire?

Which outcome will result from running the following code segment?