Are deleted Facebook and Instagram really deleted from the system ?

[that girl]

I was concerned about this because I came to think that what if in a few years later I go apply for a job. And we all know that some companies nowadays check your social network background. And this reminds me of some pictures ive posted a year ago, which I already deleted.

And I mean this is pretty serious because you could lose a job that you want really bad and makes good money whatsoever.

So my question is "how long do deleted files stay on the social networks like facebook or instagram after you delete it?" "will they be able to recover the pictures or posts again?" "even if you deactivate your account?"

thank you