First, you might think what KWoC is. It is Kharagpur Winter of Code. It is a 5-week long online programme for the open source developers conducted by open source club at IIT-Kharagpur. This could be helpful for who would participate in Google Summer of Code (GSoC).
Java is an Object Oriented Programming language that produces software for multiple platforms. It can run on any computer with the help of Java Virtual Machine (JVM). Java is Platform Independent.
Tabla is a Hindustani Musical Instrument. It is a Percussion Instrument.
First, you have to know What Music is?
Vocal, Instrument, Dance. All these three together form a Music. Vocal is the Singing part, Instrument gives the flavor to the Song, and last the Dance is where they act according to the Song. This leads to the Music.