题目内容

JDBC中，用于表示数据库连接对象的是（）。In JDBC, the object used to represent a database connection is （）.

A. Connection
B. DBConnection
C. DataBaseConnection
D. Conn

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A. rs.fetchInt(1)
B. rs.fetchInt(0)
C. rs.getInt(1)
D. rs.getInt(0)

A. jdbc:mysql:/localhost/3306/mydb
B. jdbc:mysql://localhost:3306/mydb
C. jdbc//mysql:/localhost:3306/mydb
D. jdbc:mysql://localhost/3306/mydb

A. com.mysql.cj.jdbc.Driver
B. mysql.com.cj.jdbc.Driver
C. com.mysql.JDBCDriver
D. com.mysql.jdbc.cj.jDriver

A. restore()
B. goback()
C. commit()
D. rollback()