No it is not. it's quite simple when you get the hang of it
The second one, it should be the one that is opening left with a line underneath, the images are unclear but that’s the most likely correct answer !
a cloud phone system is a Voice over IP (VoIP) based business telephoneplatform that is hosted by a third-party provider such as OnSIP. Cloud phonesystems typically offer advanced security and telephony features such as: extension dialing, auto attendants, and conference bridges
A string is generally considered as a data type and is often implemented as an array data structure of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding. String may also denote more general arrays or other sequence (or list) data types and structures.
The word you are looking for is active.