MCQOPTIONS
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MCQOPTIONS
This section includes 46 Mcqs, each offering curated multiple-choice questions to sharpen your Hadoop knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
_________ is a Cassandra feature that optimizes the cluster consistency process. |
| A. | Hinted handon |
| B. | Hinted handoff |
| C. | Tombstone |
| D. | Hinted tomb |
| Answer» C. Tombstone | |
| 2. |
A __________ determines which data centers and racks nodes belong to it. |
| A. | Client requests |
| B. | Snitch |
| C. | Partitioner |
| D. | None of the mentioned |
| Answer» C. Partitioner | |
| 3. |
The import-tables tool imports a set of tables from an RDBMS to? |
| A. | Hive |
| B. | Sqoop |
| C. | HDFS |
| D. | Mapreduce |
| Answer» D. Mapreduce | |
| 4. |
Cassandra uses a protocol called _______ to discover location and state information. |
| A. | gossip |
| B. | intergos |
| C. | goss |
| D. | all of the mentioned |
| Answer» B. intergos | |
| 5. |
Apache Cassandra is a massively scalable open source _______ database. |
| A. | SQL |
| B. | NoSQL |
| C. | NewSQL |
| D. | All of the mentioned |
| Answer» C. NewSQL | |
| 6. |
Sqoop can also import the data into Hive by generating and executing a ____________ statement to define the data’s layout in Hive. |
| A. | SET TABLE |
| B. | CREATE TABLE |
| C. | INSERT TABLE |
| D. | All of the mentioned |
| Answer» C. INSERT TABLE | |
| 7. |
Sqoop direct mode does not support imports of ______ columns. |
| A. | BLOB |
| B. | LONGVARBINARY |
| C. | CLOB |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
Which of the following interface is implemented by Sqoop for recording? |
| A. | SqoopWrite |
| B. | SqoopRecord |
| C. | SqoopRead |
| D. | None of the mentioned |
| Answer» C. SqoopRead | |
| 9. |
Sqoop can also import the data into Hive by generating and executing a ____________ statement to define the datas layout in Hive. |
| A. | SET TABLE |
| B. | CREATE TABLE |
| C. | INSERT TABLE |
| D. | All of the above |
| Answer» C. INSERT TABLE | |
| 10. |
When ___________ contents exceed a configurable threshold, the memtable data, which includes indexes, is put in a queue to be flushed to disk. |
| A. | subtable |
| B. | memtable |
| C. | intable |
| D. | memorytable |
| Answer» C. intable | |
| 11. |
Which of the following class is used for general processing of error? |
| A. | LargeObjectLoader |
| B. | ProcessingException |
| C. | DelimiterSet |
| D. | LobSerializer |
| Answer» C. DelimiterSet | |
| 12. |
Which of the following is a singleton instance class? |
| A. | LargeObjectLoader |
| B. | FieldMapProcessor |
| C. | DelimiterSet |
| D. | LobSerializer |
| Answer» B. FieldMapProcessor | |
| 13. |
ClobRef is a wrapper that holds a CLOB either directly or a reference to a file that holds the ______ data. |
| A. | CLOB |
| B. | BLOB |
| C. | MLOB |
| D. | All of the mentioned |
| Answer» B. BLOB | |
| 14. |
Microsoft uses a Sqoop-based connector to help transfer data from _________ databases to Hadoop. |
| A. | PostreSQL |
| B. | SQL Server |
| C. | Oracle |
| D. | MySQL |
| Answer» C. Oracle | |
| 15. |
Using ___________ file means you don’t have to override the SSL_CERTFILE environmental variables every time. |
| A. | qlshrc |
| B. | cqshrc |
| C. | cqlshrc |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 16. |
Which of the following argument is not supported by import-all-tables tool? |
| A. | –class-name |
| B. | –package-name |
| C. | –database-name |
| D. | –table-name |
| Answer» B. –package-name | |
| 17. |
There are _________ types of read requests that a coordinator can send to a replica. |
| A. | two |
| B. | three |
| C. | four |
| D. | all of the mentioned |
| Answer» C. four | |
| 18. |
Data in the commit log is purged after its corresponding data in the memtable is flushed to an _________ |
| A. | SSHables |
| B. | SSTable |
| C. | Memtables |
| D. | None of the mentioned |
| Answer» C. Memtables | |
| 19. |
Client-to-node encryption protects data in flight from client machines to a database cluster using ___________ |
| A. | SSL |
| B. | SSH |
| C. | SSN |
| D. | All of the mentioned |
| Answer» B. SSH | |
| 20. |
Cassandra marks data to be deleted using _________ |
| A. | tombstone |
| B. | combstone |
| C. | tenstone |
| D. | none of the mentioned |
| Answer» B. combstone | |
| 21. |
BigDecimal is comprised of a ________ with an integer ‘scale’ field. |
| A. | BigInt |
| B. | BigInteger |
| C. | MediumInt |
| D. | SmallInt |
| Answer» C. MediumInt | |
| 22. |
For each SSTable, Cassandra creates _________ index. |
| A. | memory |
| B. | partition |
| C. | in memory |
| D. | all of the mentioned |
| Answer» C. in memory | |
| 23. |
_________ tool can list all the available database schemas. |
| A. | sqoop-list-tables |
| B. | sqoop-list-databases |
| C. | sqoop-list-schema |
| D. | sqoop-list-columns |
| Answer» C. sqoop-list-schema | |
| 24. |
ZooKeeper’s architecture supports high ____________ through redundant services. |
| A. | flexibility |
| B. | scalability |
| C. | availability |
| D. | interactivity |
| Answer» D. interactivity | |
| 25. |
The Email & Apps team of ___________ uses ZooKeeper to coordinate sharding and responsibility changes in a distributed email client. |
| A. | Katta |
| B. | Helprace |
| C. | Rackspace |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 26. |
ZooKeeper is used for configuration, leader election in Cloud edition of ______________ |
| A. | Solr |
| B. | Solur |
| C. | Solar101 |
| D. | All of the mentioned |
| Answer» B. Solur | |
| 27. |
How many types of special znodes are present in Zookeeper? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | All of the mentioned |
| Answer» C. 3 | |
| 28. |
To register a “watch” on a znode data, you need to use the _______ commands to access the current content or metadata. |
| A. | stat |
| B. | put |
| C. | receive |
| D. | gets |
| Answer» B. put | |
| 29. |
_______ has a design policy of using ZooKeeper only for transient data. |
| A. | Hive |
| B. | Imphala |
| C. | Hbase |
| D. | Oozie |
| Answer» D. Oozie | |
| 30. |
Which of the following is not a services provided by ZooKeeper? |
| A. | Naming service |
| B. | Identity Service |
| C. | Leader election |
| D. | Cluster management |
| Answer» C. Leader election | |
| 31. |
Sqoop is written in? |
| A. | C |
| B. | C++ |
| C. | Java |
| D. | hadoop |
| Answer» D. hadoop | |
| 32. |
Which of the following is correct challenges that are faced by distributed applications? |
| A. | Race condition |
| B. | Deadlock |
| C. | consistency |
| D. | both a and b |
| Answer» E. | |
| 33. |
The active Hadoop configuration is loaded from $HADOOP_HOME/conf/, unless the $HADOOP_CONF_DIR environment variable is unset. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't Say |
| Answer» C. May be True or False | |
| 34. |
Is Apache Sqoop is an open-source tool? |
| A. | Yes |
| B. | No |
| C. | Depends on License |
| D. | Can't Say |
| Answer» B. No | |
| 35. |
Which of the following is a benefits of distributed applications? |
| A. | Scalability |
| B. | Transparency |
| C. | Reliability |
| D. | All of the above |
| Answer» E. | |
| 36. |
Sqoop standsfor? |
| A. | SQL to Hadoop |
| B. | SQL to Hbase |
| C. | MySQL to Hadoop |
| D. | SQL Hadoop |
| Answer» B. SQL to Hbase | |
| 37. |
Data processed by Scoop can be used for? |
| A. | Hbase |
| B. | HDFS |
| C. | Mapreduce |
| D. | MahOut |
| Answer» D. MahOut | |
| 38. |
__________ is one of many possible IAuthorizer implementations and the one that stores permissions in the system_auth.permissions table to support all authorization-related CQL statements. |
| A. | CassandraAuth |
| B. | CassandraAuthorizer |
| C. | CassAuthorizer |
| D. | All of the mentioned |
| Answer» C. CassAuthorizer | |
| 39. |
_________ can be configured per table for non-QUORUM consistency levels. |
| A. | Read repair |
| B. | Read damage |
| C. | Write repair |
| D. | None of the mentioned |
| Answer» B. Read damage | |
| 40. |
If the table has been configured with the __________ property, the coordinator node for the read request will retry the request with another replica node. |
| A. | rapid_retry |
| B. | speculative_retry |
| C. | speculative_rapid |
| D. | none of the mentioned |
| Answer» C. speculative_rapid | |
| 41. |
The java package structure has changed from com.yahoo.zookeeper* to ___________ |
| A. | apache.zookeeper |
| B. | org.apache.zookeeper |
| C. | org.apache.zookeeper.package |
| D. | all of the mentioned |
| Answer» C. org.apache.zookeeper.package | |
| 42. |
ZooKeeper allows distributed processes to coordinate with each other through registers, known as ___________ |
| A. | znodes |
| B. | hnodes |
| C. | vnodes |
| D. | rnodes |
| Answer» B. hnodes | |
| 43. |
A number of constants used in the client ZooKeeper API were renamed in order to reduce ________ collision. |
| A. | value |
| B. | namespace |
| C. | counter |
| D. | none of the mentioned |
| Answer» C. counter | |
| 44. |
ZooKeeper itself is intended to be replicated over a sets of hosts called ____________ |
| A. | chunks |
| B. | ensemble |
| C. | subdomains |
| D. | none of the mentioned |
| Answer» C. subdomains | |
| 45. |
ZooKeeper is especially fast in ___________ workloads. |
| A. | write |
| B. | read-dominant |
| C. | read-write |
| D. | none of the mentioned |
| Answer» C. read-write | |
| 46. |
Which of the guarantee is provided by Zookeeper? |
| A. | Interactivity |
| B. | Flexibility |
| C. | Scalability |
| D. | Reliability |
| Answer» E. | |