1. The _________ periodically receives a __________ and a blockreport from each ______ in the __________. A) Cluster, heartbeat, datanode, namenode B) Namenode, heartbeat, datanode, cluster C) Datanode, heartbeat, cluster, namenode D) Datanode, cluster, heartbeat, namenode 2. Which of the following conditions is suitable for HDFS? A) Large file size B) Write Many, Read Once C) Low-latency (short waiting time) data access D) All of the above 3. Which of the following about storing HDFS blocks is correct? A) Spread HDFS data uniformly across the datanodes in the cluster. B) Keep one of the replicas of a block on the same node as the node that is writing the block. C) Spread one replica of a block across another rack so that cluster can survive loss of whole rack. D) All of the above
1. The _________ periodically receives a __________ and a blockreport from each ______ in the __________. A) Cluster, heartbeat, datanode, namenode B) Namenode, heartbeat, datanode, cluster C) Datanode, heartbeat, cluster, namenode D) Datanode, cluster, heartbeat, namenode
2. Which of the following conditions is suitable for HDFS? A) Large file size B) Write Many, Read Once C) Low-latency (short waiting time) data access D) All of the above
3. Which of the following about storing HDFS blocks is correct? A) Spread HDFS data uniformly across the datanodes in the cluster. B) Keep one of the replicas of a block on the same node as the node that is writing the block. C) Spread one replica of a block across another rack so that cluster can survive loss of whole rack. D) All of the above
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