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Hadoop Interview Questions and Answers
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Questions
Hadoop
0
votes
Q: What are the network requirements for hadoop?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
hadoop-networkrequirements
0
votes
Q: In Hadoop_pid_dir and what does pid stands for?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
pid
hadoop_pid_dir
0
votes
Q: Can we have multiple entries in the master files?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
masterfiles
0
votes
Q: What is the function Of Hadoop-env.sh and where is it present?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
hadoop-envsh
0
votes
Q: What do masters and slaves consist of?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
masters-slave
0
votes
Q: How can we look for the Namenode in the browser?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
namenodebrowser
0
votes
Q: What does etc.init.d do?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
etcinitd
0
votes
Q: What is the use of the command Mapred.job.tracker?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
mapredjobtracker
0
votes
Q: At times you get a connection refused Java Exception when you run the file system check command Hadoop fsck?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
hadoop
fsck
0
votes
Q: How can I restart Namenode?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
restart-namenode
0
votes
Q: Is fs.mapr working for a single directory?
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
mapr-directory
0
votes
Q: If Reducers do not start before all Mappers finish then why does the progress on Mapreduce Job shows something like Map 50 percents Reduce 10 percents and why Reducers progress percentage is
asked
Jun 26, 2023
in
Hadoop
by
Robindeniel
mapper
reducer
0
votes
Q: On what basis NameNode will decide which DataNode to write on?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
namenode
0
votes
Q: If a Data Node is full how it's identified?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
data
node
0
votes
Q: What is a Heartbeat in Hdfs?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
heartbeat
hdfs
0
votes
Q: What is a Daemon?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
daemon-hadoop
0
votes
Q: What is a Commodity Hardware so does Commodity Hardware include Ram?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
commodityhardware
0
votes
Q: Since the data is replicated thrice in Hdfs so does it mean that any calculation done on One Node will also be replicated on the other Two?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
data-replicated
hdfs
hadoop
0
votes
Q: Can you give some examples of Big Data?
asked
Jun 22, 2023
in
Hadoop
by
rajeshsharma
bigdata
hadoop
0
votes
Q: How Hdfs is different from traditional File Systems?
asked
Jun 21, 2023
in
Hadoop
by
sharadyadav1986
hdfs
traditional-file-systems
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
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