GATE, NIC, TIFR, DRDO, ISRO,BARC --- CSE all in One (Study material)

Hello everyone, I’m currently preparing for GATE and have a few doubts regarding the preparation strategy, resources, and overall approach. If anyone here has successfully cleared GATE this , I would really appreciate it if you could spare a few minutes to guide me and help clarify some of my doubts. Your advice and experience would be extremely valuable. Please feel free to message me directly. Thank you in advance !