Cloudera HBase Certification Questions and Answers (Dumps and Practice Questions)

Question : How HBase Maps are Sorted

1. Key or Values are kept in lexicographic sorted order
2. HBase Keys and Values are stored in Random Order
3. Keys and Values are not sorted at all



Correct Answer : 1

Key or Value pairs are kept in lexicographic sorted order and this is very important consideration when scanning large amounts of data.




Question : Select the correct option for the HBase ..

1. HBase is Built upon a distributed filesystem.
2. A given row can have any number of columns
3. There could be a Gap between keys
4. All of the above



Correct Answer : 4
HBase is Distributed
Built upon a distributed filesystem (HDFS)
Underlying file storage abstracts away complexities of distributed computing

HBase is Sparse
A given row can have any number of columns
May be gaps between keys




Question :

In HBase data is not updated ?

1. True
2. False

Correct Answer : 1

HBase is Multidimensional
All data is versioned using a timestamp (or configurable integer)
Data is not updated, instead it is added with a new version number

Related Questions

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Question : In which case Hbase should not be used ?


1. When you only append data to your dataset and read the whole data
2. When you need random read
3. When you need random write
4. When access pattern is well known




Question :

One technical architech designing a solution for storing huge data volume which is everyday generated by stock markets and its purpose
is only storing these data and reading it once for daily analysis and he comes to conclusion that, he will use HBase. So he took a right decision



1. Yes
2. No


Question :

Please select the correct answer for HBase ?


1. In HBase every row has a Row Key
2. All columns in HBase are belongs to a particular column family
3. A table can have one or more column families
4. Table cells are versioned
5. All of the above





Question :

When you are designing a Column Families, so what makes you think for keeping the data in different column families

1. By Default each enity should be kept in different column family
2. Data that is not frequently accessed together should be kept in different Column Family
3. Data which used different compression methods
4. 1,2 and 3 are correct
5. Only 2 and 3 are correct





Question :

Select the correct option for HBase table

1. Physically stored on a per-column family basis.
2. Empty cells are not stored
3. Each cell has a timestamp
4. Multiple version of a cell can exist
5. All of the above




Question :

When HBase is compared with RDBMS then which statement is true.

1. HBase automatically partitions data in regions
2. HBase does not support explicit joins
3. A lookup by row key implicitly joins data from column families if necessary
4. All of the above
Solution : 15