在Shell中test命令有整数运算符、字符串运算符、文本运算符、逻辑运算符四类运算符。（)

A.用于检查某个条件是否成立

B.数值测试

C.字符串测试

D.文件测试

A.useradminpassword0test

B.useradmintestencryption

C.useradminencrytiontest

D.useradmintestpassword

A.hdfs dfs *mkdir -p /test/dir

B.hdfs fs -mkdir -p /test/dir

C.hadoop fs -mkdir -p /test/dir

D.hadoop dfs -mkdir /test/dir

A.hdfs dfs *mkdir -p /test/dir

B.hdfs fs -mkdir -p /test/dir

C.hadoop fs -mkdir -p /test/dir

D.hadoop dfs -mkdir /test/dir

A.hadoop fs -mkdir -p /test/dir

B.hadoop dfs -mkdir /test/dir

C.hdfs fs -mkdir -p /test/dir

D.hdfs dfs *mkdir -p /test/dir