HBase Quiz 1 | Englishfreetest.com

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  • Test content
    Question 1: Hbase creates a new version of a record during
    A. Creation of a record
    B. Modification of a record
    C. Deletion of a record
    D. All the above
    Question 2: A small chunk of data residing in one machine which is part of a cluster of machines holding one Hbase table is known as
    A. Split
    B. Region
    C. Rowarea
    D. Tablearea
    Question 3: The Value that is unique across all the rows in Hbase table is
    A. Rownum
    B. RowIndex
    C. RowID
    D. RowKey
    Question 4: What does the following command do? hbase> alter ‘t1?, NAME => ‘f1?, MIN_VERSIONS => 2
    A. All the columns in the column family f1 of table t1 can have minimum 2 versions
    B. All the columns in the column family f1 of table t1 can have maximum 2 versions
    C. Creates 2 versions of the column family named f1 in table t1
    D. Created 2 versions of the table t1
    Question 5: Filters in Hbase can be applied to
    A. Rowkeys
    B. Column qualifiers
    C. Data values
    D. All of the above
    Question 6: In Hbase there are two situations when the WAL logfiles needs to be replayed. One is when the server fails. The other is when
    A. The logs are full
    B. Rows are deleted
    C. The cluster fails
    D. Rows are updated
    Question 7: Typically a Hbase Regionserver is collocated with
    A. HDFS Namenode
    B. HDFS datanode
    C. As a client to HDFS server
    D. Tasktrackers
    Question 8: At the end of a major compaction the number of HFiles of a Hbase table is
    A. Equal to number of column families
    B. One HFile
    C. Half of the number of column families of a region
    D. Double the number of column families of a region
    Question 9: In a reduce-side join the Mapreduce step which is used to collocate the relevant records form the two joining data sets is
    A. Map step
    B. Reduce step
    C. Shuffle and sort step
    D. Final output step
    Question 10: If a region directory does not have .tmp directory then
    A. It had no compaction
    B. It had only minor compaction
    C. It had major compaction
    D. It is a invalid region