An apartment can be explained as a housing unit that is a part of a building which can be called as either the apartment building or the apartment house. They size of the apartment depends on the owner as it can be made for personal use of even for the purpose of renting. There is standard protocol that is followed almost everywhere. The apartments can be classified as a one bedroom apartment or two bedroom apartment and so on.
The general question however still remains that what is a one bedroom apartment.The exact definition of the one bedroom differs from places as the features offered are different. In general the one bedroom apartment is expected to contain a bedroom, a living room, kitchen along with a bathroom. The other features may vary from the owners and place point of view.