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Latest HBase Quiz Questions Part 3 | HBase Challenge

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[数据库(综合) 所属分类 数据库(综合) | 发布者 店小二03 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏
1. HBase Quiz Questions With Answers

If you think you are perfect in HBase Technology , so you are in the right place. Today, we will provide you with some important HBase Quiz Questions and challenge you to solve it in 10 minutes. These HBase Quiz Questions are designed by HBase Specialist after covering the two HBase Quiz . This multiple Choice HBase Quiz Questions will help you to improve your technical skills in HBase Technology.

So, let’s explore HBase Quiz Questions.


Latest HBase Quiz Questions Part 3 | HBase Challenge

Latest HBase Quiz Questions Part 3 | HBase Challenge

Que 1. What does the following command do? hbase> alter ‘t1?, NAME => ‘f1?, MIN_VERSIONS => 2

All the columns in the column family f1 of table t1 can have maximum 2 versions.

All the columns in the column family f1 of table t1 can have minimum 2 versions.

Creates 2 versions of the column family named f1 in table t1.

Created 2 versions of the table t1.

This command says that all the columns in the column family f1 of table t1 can have maximum 2 versions.

Que 2. Hbase creates a new version of a record during_______.

Creation of a record

Modification of a record

Deletion of a record

All the above

During Creation, Modification or Deletion of a record Hbase creates a new version of a record.

Que 3. Filters in Hbase can be applied to

Rowkeys

Column qualifiers

Data values

all of above

To RowKeys, Column qualifiers as well as Data values, filters can be applied.

Que 4. 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

Enough to fit into memory

Half the size of the other table

Double the size of the other table

Small enough to be located in one physical machine

It should be enough to fit into memory.

Que 5. The values stored inside a cell which is identified using a rowkey, column family and column qualifier is stored as

Byte

Number

Varchar

Nchar

The values stored inside a cell is stored as a Byte.

Que 6. A small chunk of data residing in one machine which is part of a cluster of machines holding one Hbase table is known as

Split

Region

Rowarea

Tablearea


Latest HBase Quiz Questions Part 3 | HBase Challenge

Basically, a Region is a small chunk of data residing in one machine which is part of a cluster of machines holding one Hbase table

Que 7. Servers that host regions of a Hbase table are called

RegionServers

Regional servers

Hbase Servers

Splitservers

RegionServers host regions of a Hbase table.

Que 8. Every row in a Hbase table has

Different number of column families

Same number of columns

Same number of column families

Different number of columns

Learn Hadoop from Industry Experts

Every row in a Hbase table has Different number of column families.

Que 9. In Hbase there are two situations when the WAL logfiles needs to be replayed. One is when the server fails. The other is when

The logs are full

Rows are deleted.

The cluster fails

Rows are updated

Also, when cluster fails, the WAL logfiles needs to be replayed.

Que 10. At the end of a major compaction the number of HFiles of a Hbase table is

Equal to number of column families

One HFile

Half of the number of column families of a region

Double the number of column families of a region

After major compaction the number of HFiles of a Hbase table is, Equal to number of column families.

Que 11. While reading from Hbase the sequence in which the read happens is

MemCache,Blockcache,HFile

Blockcache,HFile,Memcache

MemCache,HFile,Blockcache

HFile,Memcache,Blockcache

At the time of reading from the HBase, he sequence in which the read happens is MemCache,Blockcache,HFile.

Que 12. The property which enables a fully distributed mode for Hbase is

hbase-cluster.distributedy

hbase-cluster.distributed-all

hbase-cluster.fully-distributed

none of the above

To enable fully distributed mode for HBase, property is hbase-cluster.distributedy

Que 13. The Value that is unique across all the rows in Hbase table is

RowKey

Rownum

RowID

RowIndex

RowKey is unique across all the rows in Hbase table.

Que 14. Which of the following is not one of the primitive commands to interact with Hbase.

DROP

Get

PUT

SCAN


Latest HBase Quiz Questions Part 3 | HBase Challenge

DROP is not a primitive commands to interact with Hbase.

Que 15. When a region does not have recovered.edits file, it indicates.

No write-ahead log replay has happened.

No compaction has happened in the region

Only major compaction has happened.

Only minor compaction has happened.

If a region does not have recovered.edits file, it indicates, No write-ahead log replay has happened.

Que 16. In a reduce-side join the Mapreduce step which is used to collocate the relevant records form the two joining data sets is

Final output step

CShuffle and sort step

Reduce step

Map step

To collocate the relevant records form the two joining data sets is, Shuffle and sort step.

Que 17. The method which deletes a specific version within a cell is

DeleteColumns

DeleteColumn

DeleteSpecific

Deleteversionno

The method which deletes a specific version within a cell is DeleteColumns

Que 18. The two tables which are used to find where regions of various tables are hosted are

Region base and the Metabase

Regiontab and Metatab

-Root and .Meta

-Root and .Region

Region base and the Metabase are the two tables which are used to find where regions of various tables are hosted.

Que 19. Typically a HBase regionserver is collocated with

Data Block.

MetaBlock

Index Block

Trailer Block

Typically a HBase regionserver is collocated with Data Block.

Que 20. HBase column qualifier in a column can be

Omitted

written to and read form when omitted.

all of the above

none of the above

In a column HBase column qualifier can be omitted.

2. Conclusion

Hence, you have completed Online HBase Quiz Question Part 3. Hope these HBase Quiz Questions helped you to improve your performance in HBase.

See also HBase Quiz Questions Part 2
Latest HBase Quiz Questions Part 3 | HBase Challenge

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