Question

which tag divide html tables in multiple section

Answer 1

Use <tbody> to divide html tables in multiple sections.

Answer 2

While you are looking for the different concepts of computer, you must attend the theory and lab sessions that are conducted by the teachers on regular basis.

You can easily understand which table divides the  html table into multiple sections.

This can be one of the units, included in your curriculum which can be of great help for your academics and computer practical knowledge.