GATE

If you clear GATE you will get job in PSU which use GATE score to hire engineers. You will get CTC around Rs 6+ Lakhs. Private sector does not use GATE score for hiring.

You are advised to study well and prepare for GATE. GATE will help you admission in M.Tech and job in PSUs. You may also prepare for Indian Engineering Services examination.

Hi
If you are looking for global exposure and indepth research, prepare for GTU otherwise GATE is equally competitive.

Here are some tips which you can keep in mind while preparing for GATE :
Go through latest syllabus of GATE.Read articles written by previously qualified candidates.Try to solve as much as possible theoretical and numerical problems.Develop some good tricks which will save your calculation time.
To get some more good tips, check this link out:;
https://edudrona.com/questions/question/how-should-i-prepare-for-gate-2017

All stream have its own path.All subjects have its own importance. It all depends on your focus you keep on the subject.

No, there is no difficulty in writing GATE exam. It doesn't matter what branch you have taken, you can appear for GATE easily.

No, they are not compulsory but having either one of the scores is an advantage no doubt.