当你输入hadoopfsck /造成“connection refused java exception’”时，系统究竟发生了什么？

当你输入hadoopfsck/造成“connectionrefusedjavaexception’”时，系统究竟发生了什么？

A.conn(open)

B.conn("open")

C.conn.open

D.open.conn

在连接对象的创建方法，正确的是()。

A conn=createobject("ADOBD.Connection")

B conn=server.createobject("ADODB.Connection")

C set conn=server.createobject(ADOBD.Connection)

D set conn=server.createobject("ADODB.Connection")

A.rs.opensql，conn

B.rs.opensql，conn，1，3

C.rs.opensql，conn，3，3

D.rs.opensql，conn，1

A.rs.Open strSql,conn

B.rs.Open strSql,conn,1,2

C.rs.Open strSql,conn,,2

D.rs.Open strSql,conn,1

当你泉州信息超市修改密码时，需输入用户和服务器名才可以修改密码。()

以下连接对象的创建方法中，正确的是 ？

A.Set Conn=Server.CreateObjet(“ADODB.Connection”)

B.Set Conn=Server.CreateObjet(ADODB.Connection)

C.Conn=CreateObjet(“ADODB.Connection”)

D.Conn=Server.CreateObjet(“ADODB.Connection”)

A.SqlConnection conn = new SqlConnection("Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB")

B.SqlConnection conn = new Connection("Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB")

C.SqlConnection conn = new SqlConnection(Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB)

D.SqlConnection conn = new OleDbConnection("Data Source = .; Integrated Security = SSPI; Initia

A.Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/SCHOOL","root","manager);

B.Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/SCHOOL");

C.Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:1433/SCHOOL");

D.Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:1433/SCHOOL","root","manager);

A.SqlConnection conn = new SqlConnection("Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB")

B.SqlConnection conn = new Connection("Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB")

C.SqlConnection conn = new SqlConnection(Data Source = .; Integrated Security = SSPI; Initial Catalog = myDB)

D.SqlConnection conn = new OleDbConnection("Data Source = .; Integrated Security = SSPI; Initia

A.conn=createobject(“ADODB.Connection”)

B.conn=server.createobject(“ADODB.Connection”)

C.set conn=server.createobject(ADODB.Connection)

D.set conn=server.createobject(“ADODB.Connection”)