Hbase(Engineering > Computer Science And Engineering ) Questions and Answers

Question 1. The Hbase tables are
  1.    Made read only by setting the read-only option
  2.    Always writeable
  3.    Always read-only
  4.    Are made read only using the query to the table
Explanation:-
Answer: Option A. -> Made read only by setting the read-only option




Question 2. Every row in a Hbase table has
  1.    Same number of columns
  2.    Same number of column families
  3.    Different number of columns
  4.    Different number of column families
Explanation:-
Answer: Option D. -> Different number of column families




Question 3. In a Map-Side join, we take rows from one table and map it with rows from the other table. The size of one of the table should be
  1.    Enough to fit into memory
  2.    Half the size of the other table
  3.    Double the size of the other table
  4.    Small enough to be located in one physical machine
Explanation:-
Answer: Option A. -> Enough to fit into memory




Question 4. Hbase creates a new version of a record during
  1.    Creation of a record
  2.    Modification of a record
  3.    Deletion of a record
  4.    All the above
Explanation:-
Answer: Option D. -> All the above




Question 5. HBaseAdmin and ____________ are the two important classes in this package that provide DDL functionalities.
  1.    HTableDescriptor
  2.    HDescriptor
  3.    HTable
  4.    HTabDescriptor
Explanation:-
Answer: Option A. -> HTableDescriptor




Question 6. Explain why to use Hbase?
  1.    High capacity storage system
  2.    Distributed design to cater large tables
  3.    Column-Oriented Stores
  4.    All the above
Explanation:-
Answer: Option D. -> All the above




Question 7. The _________ Server assigns regions to the region servers and takes the help of Apache ZooKeeper for this task.
  1.    Region
  2.    Master
  3.    Zookeeper
  4.    All of the mentioned
Explanation:-
Answer: Option D. -> All of the mentioned




Question 8. When a region does not have recovered.edits file, it indicates.
  1.    No compaction has happened in the region
  2.    Only major compaction has happened
  3.    Only minor compaction has happened
  4.    No write-ahead log replay has happened
Explanation:-
Answer: Option D. -> No write-ahead log replay has happened




Question 9. Mention how many operational commands in Hbase?
  1.    Get
  2.    Put
  3.    Delete
  4.    All of the mentioned
Explanation:-
Answer: Option D. -> All of the mentioned




Question 10. HBase is ________, defines only column families.
  1.    Row Oriented
  2.    Schema-less
  3.    Fixed Schema
  4.    All of the mentioned
Explanation:-
Answer: Option B. -> Schema-less




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