What is the difference between a “code of ethics” and “strict censorship?”
what's a present-day example and a past example of a country who censors the press; thereby, limiting “the truth”—objective information—to the public?

Code of ethics are guidelines while censorship is a rule of law. There are some technical laws in the nation that may allow for this to happen if it is pushed.

Explanation:

Code of ethics are general guidelines over content that are maintained so as to maintain the sanctum of the medium and is not imposed legally.

it is just used to pressure people into making the sort of content that needs to be made according to the enforcer.

But those who defy are not liable to losses.

This is not the case in censorship when people are penalized for going against the set of guidelines and may even get criminal sentences

This has been going on for a long time in the country under the new age and in the world.

you didnt put the link on, so i cant read the paraphrase

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,