java vs. c/c++ vs. asm
If you read the wiki on java, it says a lot of its syntax is derived from c/c++, but like another said java is platform independent. they are basically the same. asm trumps all languages because it is on a lower level.
perl vs. python vs. ruby
perl or ruby because it doesnt have retarded fucking indenting. ruby is in dev by some japanese people, wouldnt trust it.
php vs. html vs. xml vs. asp vs. javascript
if you learn one, you kinda have to learn the others. essentials are php, javascript, html, xml, and mysql. everything else is optional. websites have to use all of these so make their site actually function well, so you must learn all or none.
dos vs. bash vs. whatever else
tl;dr. lick
ling to view the boring shit.