"javac <FILE NAME>" (unsurprisingly, stands for "java compile"), will compile your java source code in to a .java file, that can be run with the "java <FILE NAME>" command.
Make sure that your command prompt is set to the right destination when you run these commands, using "cd <DESTINATION>", otherwise they may be unable to find them in the incorrect destination.
Answer:
Sentinel value
Explanation:
It is the sentinel value in computer programming which is also being termed as the flag value, rogue value, dummy data signal value or the trip value. It has its meaning in the context of the algo, and that clarifies that it is the end of the block or code basically inside a loop or in any kind of recursive algo.
Off the top of my head I know there was a lot of researching by means of books. Books were where you went to find information. So nowadays you can find everything with a search engine whereas you had to go to the bookstore back then.
BIOS stands for basic input and output system. It is a program used during the start-up (or booting process) of a computer or device. Hope this helps! :)