I am not sure about this "WAR files can or cannot be signed", i dont understand the term "signed"
I found the answer description below. Anybody can explain, thank you
Option B is incorrect because WAR files may be signed. Option C is incorrect.
Which four are true about WAR files? (Choose four.)
A WAR stands for Web ARchive. B WAR files cannot be signed. C WAR files typically contain EAR files. D Entire web applications can be packaged into a single WAR file. E WAR files can be created using the standard Java jar command. F WEB-INF and META-INF are common top-level directories within WAR files.