Considering this, can a year back student get a job?
Yes of course ,but one should never give up fist of all some companies have some policy like that make such student not eligible to attend there recruitment . But there are companies which don't bother about it after all after the experience no one is going to ask you about past.
Also Know, can a year back student apply for gate? Yes you can apply for GATE 2019. As per GATE 2019 eligibility criteria a candidate who is currently in final year or already completed is eligible for GATE exam. So if you clear your 4 year engineering degree within 4 years i.e., in 2019. You are eligible for GATE 2019 exam.
Keeping this in view, can we get job with backlogs?
You can definitely get a job even if you having any backlog. The only thing is that you have to clear it before getting any placement. There are some companies which also give you some time to clear the backlog after the selection. It depends on the company you want to apply or you wish to work with.
Does dead backlogs affect placement?
Major top companies like L&T, Google, Infosys, Wipro, Accenture, etc don't allow students with live backlogs to sit in placements. Dead backlogs usually doesn't cause hindrances in sitting for placements but, its all dependent on the no.