The majority would be incorrect. Sucrose is not considered an aldose or a ketose, because it is a disaccharide made from glucose (an aldose) and fructose (a ketose). So, it has both properties within its structure. It is a non-reducing sugar.

It is possible that many say sucrose is a ketose because sucrose will fail the Benedict's test, which is designed to detect aldoses.

Sugars, the test distinguishes between aldose and ketose sugars; the test shows positive for ketose sugars.

selawinoff's test

hexose, it is a 6 carbon sugar.

example Dihydroxyacetone (ketone) and D-glyceraldehyde ( aldoste)