Read one or two properties out of several properties of CMS item

Community resources General
1

What is the Request Url to fetch items from collection with only some property, like name ?
e.g. http://{service url}/{site id}/{collection id}/{item id}?fields=Id,Name
Here, other properties are present but its values will be returned as null.

2

Since no methods are listed in API I would say that none exist. Get the item, and act on what you need.