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HDFS Interview Questions and Answers
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Questions
HDFS
0
votes
Q: Can I set the number of Reducers to Zero?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
reducers
0
votes
Q: Does Mapreduce programming model provide a way for Reducers to communicate with each other and in a Mapreduce Job can a Reducer communicate with another Reducer?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
mapreduce
programmingmodel
0
votes
Q: How NameNode handles DataNode failures?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
datanode
namenode
0
votes
Q: What is configuration of a typical Slave Node on Hadoop Cluster and how many Jvms run on a Slave Node?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hadoop
cluster
0
votes
Q: What is a task instance in Hadoop and where does it run?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hadoop
instance
0
votes
Q: What is a Task Tracker in Hadoop and how many instances of Task Tracker run on a Hadoop Cluster?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
tasktracker
hadoop
0
votes
Q: How JobTracker schedules a task?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
jobtrackerschedules
0
votes
Q: Can Hadoop be compared to Nosql Database like Cassandra?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
nosql
database
cassandra
0
votes
Q: Why reading is done in parallel and writing is not in Hdfs?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hdfs-writing
0
votes
Q: Which are the two types of writes In Hdfs?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hdfs-writes
0
votes
Q: Is a Job split into maps?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
maps
hdfs
0
votes
Q: Why are the number of splits equal to the number of Maps?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
maps
hdfs
0
votes
Q: Do we require two servers for the NameNode and the DataNodes?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
namenode
datanodes
0
votes
Q: What is the difference between Gen1 and Gen2 Hadoop with regards to the NameNode?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hadoop
namenode
0
votes
Q: What if Rack 2 and DataNode fails?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hdfs
v
0
votes
Q: Do we need to place 2nd and 3rd Data in Rack 2 only?
asked
Jun 23, 2023
in
HDFS
by
rajeshsharma
hdfs
0
votes
Q: On what basis Data will be stored on a Rack?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
rack-data
hdfs
0
votes
Q: What is a Rack?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
rack
hdfs
0
votes
Q: Is client the end user in Hdfs?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
hdfs
client-hdfs
0
votes
Q: Who is a user in Hdfs?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
hdfs
0
votes
Q: What is structured and unstructured Data?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
structured-data
unstructureddata
0
votes
Q: How the Hdfs blocks are replicated?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
hdfs-block
hdfs-replicated
0
votes
Q: How the client communicates with Hdfs?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
hdfsclient
0
votes
Q: What is a NameNode and how many instances of NameNode run on a Hadoop Cluster?
asked
Jun 22, 2023
in
HDFS
by
rajeshsharma
namenode
hadoop
cluster
0
votes
Q: What is Hdfs block size and how is it different from Traditional File System block size?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
traditionalfilesystem
hdfs
0
votes
Q: What happens if number of Reducers are 0?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
reducers
hdfs
0
votes
Q: It can be possible that a Job has 0 Reducers?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
reducers
jobs
hdfs
0
votes
Q: How many Reducers should be configured?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
reducers
hdfs
0
votes
Q: Explain the Reducer's reduce phase?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
reducer-reduce-phase
0
votes
Q: Explain the Reducer's sort phase?
asked
Jun 21, 2023
in
HDFS
by
sharadyadav1986
sortphase
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