Hadoop Quiz 5 | Englishfreetest.com

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  • Test content
    Question 1: Which command lists the blocks that make up each file in the filesystem.
    A. hdfs fsck / -files -blocks
    B. hdfs fsck / -blocks -files
    C. hdfs fchk / -blocks -files
    D. hdfs fchk / -files -blocks
    Question 2: Zookeeper ensures that
    A. All the namenodes are actively serving the client requests
    B. Only one namenode is actively serving the client requests
    C. A failover is triggered when any of the datanode fails
    D. A failover can not be started by hadoop administrator
    Question 3: When running on a pseudo distributed mode the replication factor is set to
    A. 2
    B. 1
    C. 0
    D. 3
    Question 4: Underreplication in HDFS means
    A. No replication is happening in the data nodes.
    B. Replication process is very slow in the data nodes
    C. The frequency of replication in data nodes is very low.
    D. The number of replicated copies is less than as specified by the replication factor.
    Question 5: The Hadoop tool used for uniformly spreading the data across the data nodes is named
    A. Scheduler
    B. Balancer
    C. Spreader
    D. Reporter
    Question 6: When a machine is declared as a datanode, the disk space in it
    A. Can be used only for HDFS storage
    B. Can be used for both HDFS and non-HDFs storage
    C. Cannot be accessed by non-hadoop commands
    D. cannot store text files
    Question 7: The decommission feature in hadoop is used for
    A. Decommissioning the namenode
    B. Decommissioning the data nodes
    C. Decommissioning the secondary namenode
    D. Decommissioning the entire Hadoop cluster
    Question 8: The namenode loses its only copy of fsimage file. We can recover this from
    A. Datanodes
    B. Secondary namenode
    C. Checkpoint node
    D. Never
    Question 9: What is AVRO?
    A. Avro is a java serialization library
    B. Avro is a java compression library
    C. Avro is a java library that create split table files
    D. None of these answers are correct
    Question 10: What is are true about HDFS?
    A. HDFS filesystem can be mounted on a local client’s Filesystem using NFS.
    B. HDFS filesystem can never be mounted on a local client’s Filesystem
    C. You can edit a existing record in HDFS file which is already mounted using NFS.
    D. You cannot append to a HDFS file which is mounted using NFS