Question

Which attribute defines numbers of columns in a group?

(a) width=multi-length[CN].

(b) span=number[CN].

(c) scope=scope-name[CN].

(d) headers=idrefs[CS].

This question was posed to me during an interview.

My question is taken from Working with Tables topic in chapter HTML Tables, Javascript & Jquery Basics of HTML

Answer 1

Right choice is (b) span=number[CN].

For explanation I would say: span=number[CN] attribute’s value must be an integer and greater than 0. It specifies the number of columns in a group. When span attribute is not in use, colgroup defines a single column group containing one column. width=multi-length[CN] specifies default width of for every column. scope=scope-name[CN] specifies set of data cells for which going header cell gives header information. The headers=idrefs[CN] provides list of header cells that gives header information.