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Hadoop Interview Questions and Answers
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Questions
Hadoop
0
votes
Q: What is a IdentityMapper and IdentityReducer in Mapreduce?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
identitymapper
identityreducer
mapreduce
+1
vote
Q: What is the Hadoop Mapreduce api contract for a Key and Value Class?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
valueclasskey
hadoop
0
votes
Q: Where the Mapper's intermediate data will be stored?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
mapperdata
0
votes
Q: Can Reducer talk with each other?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
reducer-talk
0
votes
Q: How does a NameNode handle the failure of the Data Nodes?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
data-nodes
namenode
0
votes
Q: How Hdfs differs with Nfs?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
hdfs
nfs
0
votes
Q: What is Nas?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
nas
hadoop
0
votes
Q: How many maximum Jvm can run on a Slave Node?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
slavenode
0
votes
Q: How a task is scheduled by a Jobtracker?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
jobtracker
hadoop-scheduler
0
votes
Q: What is the Jobtracker and what it performs in a Hadoop Cluster?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
jobtracker
0
votes
Q: How many instances of Jobtracker can run on a Hadoop Cluster?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
jobtracker
hadoopcluster
0
votes
Q: What is a Balancer in HDFS?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
balancer
hdfs
0
votes
Q: What is a Backup Node in HDFS?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
backup
node
0
votes
Q: What data is stored in a HDFS NameNode?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
hdfs
namenode
0
votes
Q: What are the default port numbers on which Nodes run in Hadoop?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
hadoop-port
nodes
0
votes
Q: What is the difference between Nodes in HDFS?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
nodes
hdfs
0
votes
Q: What is Hadoop Streaming?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
hadoop
streaming
0
votes
Q: What are the main components of a Hadoop Application?
asked
Jun 18, 2023
in
Hadoop
by
Robindeniel
components-hadoop-application
0
votes
Q: what are the different Job control options specified by MapReduce.
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
mapreduce
0
votes
Q: Define the term Partitioner and why is it used?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
parrtitioner
0
votes
Q: Define the term Text Input Format in MapReduce?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
text
format
0
votes
Q: Illustrate the differences between MapReduce and PIG?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
mapreduce
0
votes
Q: What do you think will happen when a data node fails?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
node-fails
0
votes
Q: Explain what you understand by the term NameNode in Hadoop?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
namenode
0
votes
Q: Illustrate the differences between a reducer and a combiner?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
reducer
combiner
0
votes
Q: What do you know about Input Format?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
hadoop
input-format
0
votes
Q: Briefly list out the different configuration parameters that are required to perform the job of the MapReduce framework?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
hadoop
0
votes
Q: List out the main components of MapReduce?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
mapreduce
0
votes
Q: Why is MapReduce used?
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
mapreduce
0
votes
Q: Explain job scheduling through JobTracker.
asked
Feb 17, 2023
in
Hadoop
by
sharadyadav1986
job-tracker
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