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

Question :

Select the correct option for the flume architecture


1. The Master holds configuration information for each node
2. Node communicate with the Master in every 5 seconds
3. Nodes passes its version number to master
4. 1 and 3 are correct
5. 1,2 and 3


Correct Answer : 5







Question :

Which framework is used for export and import the data between HDFS and RDBMS

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


Correct Answer : 2

Sqoop provides a method to import data from tables in a relational database into HDFS
- Does this very efficiently via a Map only MapReduce job
- Can also go the other way
- Populate database tables from files in HDFS

Refer HadoopExam.com Recorded Training Module : 19




Question : To Create a MapReduce Jobs workflow which framework can be used ?



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



Correct Answer : 4

Apache OOzie :

Oozie is a workflow engine
- Runs on a server
- Typically outside the cluster
- Runs workflows of Hadoop jobs
- Including Pig, Hive, Sqoop jobs
- Submits those jobs to the cluster based on a workflow definition
- Workflow definitions are submited via HTTP
- Jobs can be run at specific times
- One time or recurring jobs
- Jobs can be run when data is present in a directory

Related Questions

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Question : Select the correct statement ?

1. Block size is usually 64 MB or 128 MB
2. Blocks are replicated across multiple machine
3. Access Mostly Uused Products by 50000+ Subscribers
4. All of the above


Question : Which is the master node for tracking the files block in HDFS ?


1. JOBTracker
2. DataNode
3. Access Mostly Uused Products by 50000+ Subscribers
4. DataMasteNode


Question : Select the correct options


1. NameNode store the metadata for the files
2. DataNode holds the actual blocks
3. Access Mostly Uused Products by 50000+ Subscribers
4. All of the above
5. 1 and 2 are correct


Question : Select the correct statement for the NameNode ?


1. NameNode daemon must be running at all the times
2. NameNode holds all its metadata in RAM for fast access.
3. Access Mostly Uused Products by 50000+ Subscribers
4. 1,2 and 3 are correct
5. 1 and 2 are correct




Question : If NameNode stops, the cluster becomes inaccessible ?


1. True
2. Flase


Question : Secondary NameNode is a backup for NameNode ?



1. True
2. False