Hadoop interview questions part 26
Hadoop interview questions part 26
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Total Questions: 20
1. Internal authentication stores usernames and bcrypt-hashed passwords in the ____________ table.
Correct Answer is : system_auth.credentials
2. HBase is a distributed ________ database built on top of the Hadoop file system.
Correct Answer is : Column-oriented
3. Point out the correct statement :
Correct Answer is : HBase sits on top of the Hadoop File System and provides read and write access
4. HBase is ________, defines only column families.
Correct Answer is : Schema-less
5. Apache HBase is a non-relational database modeled after Google’s _________
Correct Answer is : Bigtable
6. Point out the wrong statement :
Correct Answer is : HBase internally provides serialized access
7. The _________ Server assigns regions to the region servers and takes the help of Apache ZooKeeper for this task.
Correct Answer is : Master
8. Which of the following command provides information about the user ?
Correct Answer is : whoami
9. Which of the following command does not operate on tables ?
Correct Answer is : disabled
10. _________ command fetches the contents of row or a cell.
Correct Answer is : get
11. HBaseAdmin and ____________ are the two important classes in this package that provide DDL functionalities.
Correct Answer is : HTableDescriptor
12. HCatalog supports reading and writing files in any format for which a ________ can be written.
Correct Answer is : SerDE
13. Point out the correct statement :
Correct Answer is : Apache HCatalog provides table data access for CDH components such as Pig and MapReduce
14. Hive version ___________ is the first release that includes HCatalog.
Correct Answer is : 0.11.0
15. HCatalog is built on top of the Hive metastore and incorporates Hive’s :
Correct Answer is : DDL
16. Point out the wrong statement :
Correct Answer is : There is Hive-specific interface for HCatalog
17. The HCatalog interface for Pig consists of ____________ and HCatStorer, which implement the Pig load and store interfaces respectively
Correct Answer is : HCatLoader
18. _____________ accepts a table to read data from and optionally a selection predicate to indicate which partitions to scan.
Correct Answer is : HCatInputFormat
19. The HCatalog __________ supports all Hive DDL that does not require MapReduce to execute.
Correct Answer is : CLI
20. You can write to a single partition by specifying the partition key(s) and value(s) in the ___________ method.
Correct Answer is : setOutput
