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GATE is an entrance exam for admission to M.E/M.tech/PhD in IITs, NITs, IIITs and CFTIs. GATE score is also accepted by state government college/universities and other private colleges/universities. GATE score is also accepted by PSUs to recruit the candidates. GATE score is valid for 3 years. Please read our article on GATE 2021 here https://engineering.careers360.com/articles/gate