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Exam-HDFS Test Questions and Answers 100% Solved
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Exam-HDFS Test Questions and Answers 100% Solved1. A ________ serves as the master and there is only one NameNode per cluster.
a) Data Node
b) NameNode
c) Data block
d) Replication Correct Answer-Answer: b
Explanation: All the metadata related to HDFS including the information about data nodes,
files stored on HDFS, and Replication, etc. are stored and maintained on the NameNode.
2. Point out the correct statement :
a) DataNode is the slave/worker node and holds the user data in the form of Data Blocks
b) Each incoming file is broken into 32 MB by default
c) Data blocks are replicated across different nodes in the cluster to ensure a low degree of
fault tolerance
d) None of the mentioned Correct Answer-Answer: a
Explanation: There can be any number of DataNodes in a Hadoop Cluster.
3. HDFS works in a __________ fashion.
a) master-worker
, Exam-HDFS Test Questions and Answers 100% Solved
b) master-slave
c) worker/slave
d) all of the mentioned Correct Answer-Answer: a
Explanation: NameNode servers as the master and each DataNode servers as a worker/slave
4. ________ NameNode is used when the Primary NameNode goes down.
a) Rack
b) Data
c) Secondary
d) None of the mentioned Correct Answer-Answer: c
Explanation: Secondary namenode is used for all time availability and reliability.
5. Point out the wrong statement :
a) Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file
level
b) Block Report from each DataNode contains a list of all the blocks that are stored on that
DataNode
c) User data is stored on the local file system of DataNodes
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