74.Hadoop 优点是以下
A. 扩容能力强
B. 成本低
C. 高效率
D. 高可靠性
75.验证 SSH 无密码登录需要
A. 修改 Master 节点 authorized_keys 文件
B. 修改 Slave 节点 authorized_keys 文件
C. 验证 Master 到每个 Slave 节点无密码登录
D. 验证两个 Slave 节点到 Master 节点无密码登录
76.查询获取 Hadoop 全部的配置信息官方网址是
A. http://hadoop.apache.org/docs/current/hadoop- project-dist/hadoop-common/core-default.xml
B. http://hadoop.apache.org/docs/current/hadoop- project-dist/hadoop-hdfs/hdfs-default.xml
C. http://hadoop.apache.org/docs/current/hadoop- mapreduce-client/hadoop-mapreduce-client- core/mapred-default.xml
D. http://hadoop.apache.org/docs/current/hadoop- yarn/hadoop-yarn-common/yarn-default.xml
77.以下哪些是 yarn-site.xml 配置文件主要参数
A. yarn.resourcemanager.address
B. yarn.resourcemanager.scheduler.address
C. yarn.resourcemanager.admin.address
D. yarn.nodemanager.oux-services
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