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1분 퀴즈
2. 다음 중 데이터의 종류와 자료형이 잘못 짝지어진 것을 고르세요.
① 문자열 - "Hello, Javascript"
② 숫자형 - 0.111121212
③ 논리형 - true
④ undefined - undefined
⑤ 배열 - {}