Basics of Computer sciences Questions:

What is ?
1.Language?
2.Low level?
3.High level?
4.Assembly?
5.Kernel?
6.Interpreter?
7.Compiler?
8.Middle Level?
9.Byte code?
10.Portablity?
11.Machine Language?
12.Class?
13. Object Oriented?
Featurs & differences:
14. C, C++, Python, Java, Perl,
15. Oracle, Mysql, Postgresql, SqlServer
16. CVS, SVN, RCS ?
17. Linux, Unix, Windows?
18. Two tier, Three tier?
19. Procedural Language, PL/SQL?
20. Drivers?

Xmms problem

Problem:
I tried to play xmms through GUI which did not work. The output of terminal was as follows:
goldgod@localhost:~$ xmms
Message: device: default
Gdk-ERROR **: BadMatch (invalid parameter attributes)
serial 1526 error_code 8 request_code 72 minor_code 0
Gdk-ERROR **: BadMatch (invalid parameter attributes)
serial 1527 error_code 8 request_code 72 minor_code
Solutions:
Type [...]