A passive sentence doesn't always show the doer of the verb, which is called agent in passive sentences.
The passive voice of ''what do you do'' is "what is done by you?"
"Your name is not known by me." is passive voice.
Passive voice
No this sentence is not passive voice.
passive active A+
"The policeman chased after Fred" is active voice.
Yes it is passive voice.
No this sentence is not passive voice.
It is passive voice.
No, by including the subject 'I' you have avoided the use of the passive voice. Passive voice would be. 'It was missed.'
"Your paper is set by whom" is passive voice.
Agreement is a noun and has nothing to do with active or passive voice, which is the voice of verbs.