Fetching details from the dictionary...
studying for a test (esp. school or university entrance examinations)
彼は毎日受験勉強している。
He is studying for exams every day.
受験勉強の甲斐あって、無事に志望校に合格した。
Thanks to his hard work studying for exams, he successfully passed the entrance exam for his desired school.
予備校の生徒たちは、ひたすら受験勉強に打ち込んだ。
The cram school students single-mindedly devoted themselves to studying for exams.