Cloudera Hadoop Developer Certification Questions and Answer (Dumps and Practice Questions)

Question :

Which daemon is responsible for the Housekeeping of the NameNode ?

1. JobTracker
2. Tasktracker
3. NameNode
4. Secondary NameNode



Correct Answer : 4


Explanation: Hadoop is comprised of five separate daemons
NameNode : Holds the metadata for HDFS

Secondary NameNode : Performs housekeeping functions for the NameNode
- Is not a backup or hot standby for the NameNode

DataNode : Stores actual HDFS data blocks

JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running TaskTracker

TaskTracker : Instantiates and monitors individual Map and Reduce tasks

Refer HadoopExam.com Recorded Training Module : 2 and 3




Question :

Which daemon is responsible for insantiating and monitoring individaul Map and Reduce Task

1. JobTracker
2. TaskTracker
3. Seconary NameNode
4. DataNode


Correct Answer : 2


Explanation: Hadoop is comprised of five separate daemons

NameNode : Holds the metadata for HDFS

Secondary NameNode : Performs housekeeping functions for the NameNode
- Is not a backup or hot standby for the NameNode
DataNode : Stores actual HDFS data blocks

JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running TaskTracker

TaskTracker : Instantiates and monitors individual Map and Reduce tasks

Refer HadoopExam.com Recorded Training Module : 2 and 3





Question :

Which Daemon distributes individual task to machines

1. TaskTracker
2. JobTracker
3. MasterTracker
4. NameNode
Solution : 15


Correct Answer : 2


Explanation: Hadoop is comprised of five separate daemons

NameNode : Holds the metadata for HDFS

Secondary NameNode : Performs housekeeping functions for the NameNode
- Is not a backup or hot standby for the NameNode
DataNode : Stores actual HDFS data blocks

JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running TaskTracker

TaskTracker : Instantiates and monitors individual Map and Reduce tasks

Refer HadoopExam.com Recorded Training Module : 2 and 3

Related Questions

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Question : Which project provides prgramatic access like JDBC or ODBC of the data stored in HDFS

1. Hive
2. Pig
3. OOzie
4. Flume


Question : Hive stores in table format like RDBMS

1. True
2. False



Question : In case of hive, table definition is stored in a metastore

1. true
2. false




Question : In case of Pig, schema definition is defined at runtime

1. True
2. False



Question :
Which statement is true about HBase


1. It is a column family database
2. Can store massive amount of data like Terabytes
3. It gives high throughput
4. All of the above



Question : Which of the statement is wrong about HBase

1. Tables can have thousands of columns
2. It is not mendatory to have data in all the columns
3. It does not support transaction
4. All of the above
5. None of the above