{"id":18354,"date":"2018-06-27T04:20:24","date_gmt":"2018-06-27T04:20:24","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=18354"},"modified":"2018-06-27T04:20:24","modified_gmt":"2018-06-27T04:20:24","slug":"hbase-interview-questions","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/hbase-interview-questions\/","title":{"rendered":"Top 30 HBase Interview Questions – Crack Interview"},"content":{"rendered":"

In this HBase<\/strong> article \u201cHBase Interview Questions Part 1\u201d, here we are collecting top 30 HBase interview questions to give you an idea of the type of HBase Interview Questions which may come across in the interview. Also, we are giving answers which are correct as well to give you complete assistance.<\/p>\n

These HBase Interview Questions is for both freshers as well as experienced. Follow all the link to learn more about HBase. This link gives you a detailed description of the particular topic.<\/p>\n

So, let’s start latest HBase Interview Questions.<\/p>\n

Mostly Asked HBase Interview Questions<\/h2>\n

So, here is the list of frequently asked HBase Interview Questions you may come across:<\/p>\n

1. What is Apache HBase?<\/strong><\/p>\n

Ans. An Open Source, Hadoop project which is distributed as well as has its genesis in the Google\u2019s Bigtable. This is what we call Apache HBase. programming language of HBase is Java<\/strong>. Moreover, now it is considered an integral part of the Apache Software Foundation as well as the Hadoop<\/strong> ecosystem.<\/p>\n

2. What is HBaseFsck class?<\/strong><\/p>\n

Ans. There is a tool name hbck is available in HBase, which is implemented by the HBaseFsck class. Basically, it offers\u00a0several command-line switches that influence its behavior.<\/span><\/p>\n

3. What is REST?<\/strong><\/p>\n

Ans. Rest\u00a0explains the semantics so that we can use the protocol in a generic way to address remote resources. Also\u00a0to communicate with the server, it supports different message formats, offering many choices for a client application.<\/span><\/p>\n

4. Define Thrift?<\/strong><\/p>\n

Ans. In C++, Apache Thrift is written, but for many programming languages, it offers schema compilers, which includes Java, C++, Perl, PHP, Python, Ruby, and more.<\/span><\/p>\n

5. What are the fundamental key structures of HBase?<\/strong><\/p>\n

Ans. Row key and Column key are the fundamental key structures of HBase.<\/span><\/p>\n

6. What is JMX?<\/strong><\/p>\n

Ans. To export status of Java applications, the Java Management Extensions technology is the standard for them.<\/span><\/p>\n

5. What is Nagios?<\/strong><\/p>\n

Ans. A very commonly support tool for gaining qualitative data regarding cluster status is\u00a0Nagios. On a regular basis, it polls current metrics and also compares them with given thresholds.<\/span><\/p>\n

6. What is the syntax of describe Command?<\/strong><\/p>\n

Ans. \u00a0Syntax \u2013<\/span><\/p>\n

hbase> describe tablename<\/pre>\n
7. What is the use of exists command?<\/strong><\/p>\n
Ans. In order to check that the specified table exists or not, the exists command is used.<\/span><\/p>\n
8. What is the use of MasterServer?<\/strong><\/p>\n
Ans. To assign a region to the region server as well as to handle the load balancing we use the MasterServer.<\/span><\/p>\n
9. What is HBase Shell?<\/strong><\/p>\n
Ans. A Java API by which we communicate with HBase is what we call HBase Shell<\/strong>.<\/span><\/p>\n
10. What is the use of ZooKeeper?<\/strong><\/p>\n
Ans. To maintain the configuration information and communication between region servers and clients, we use the zookeeper. Also, it offers distributed synchronization.<\/span>
\nHBase Interview Questions for Freshers – Q. 1,3,4,5,7,8,9,10<\/strong><\/p>\n
HBase Interview Questions for Experienced – Q. 2,6<\/strong><\/p>\n
11. Define catalog tables in HBase?<\/strong><\/p>\n
Ans. In order to maintain the metadata information, we use Catalog tables.<\/span><\/p>\n
12. Define cell in HBase?<\/strong><\/p>\n
Ans. \u00a0The smallest unit of HBase table which stores the data in the form of a tuple is what we call Cell in HBase.<\/span><\/p>\n
13. Define compaction in HBase?<\/strong><\/p>\n
Ans. Basically, a process which is used to merge the Hfiles into the one file and after the merging file is created and <\/span>the then old file is deleted this is the process of Compaction.<\/p>\n
14. What is the use of HColumnDescriptor class?<\/strong><\/p>\n
Ans. The information about a column family like compression settings, Number of versions etc, stores in HColumnDescriptor.<\/span><\/p>\n
15. What is the function of HMaster?<\/strong><\/p>\n
Ans. For monitoring all Region Server instances in clusters, a MasterServer is responsible.<\/span><\/p>\n
16. How many compaction types are in HBase?<\/strong><\/p>\n
Ans. Compaction in HBase are of two types:<\/span><\/p>\n