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WorksheetsMITS Hadoop 1
Total questions: 29
Worksheet time: 18mins
Which is the core of the operating system?
Shell
Kernel
Commands
Script
To increase the response time and throughput, the kernel minimizes the frequency of disk access by keeping a pool of internal data buffer called
Pooling
Spooling
Buffer Cache
Swapping
Which command is used to display the unix version
uname -r
uname -n
uname -t
kernel
How do you get help about the command “cp”?
help cp
man cp
cd
none of the above
Which one shows the name of the operating system?
uname -n
uname -r
uname -o
uname -m
For reading/writing data to/from HDFS, clients first connect to-
NameNode
DataNode
Secondary NameNode
None of the above
IBM and ________ have announced a major initiative to use Hadoop to support university courses in distributed computer programming.
Google Latitude
Android (operating system)
Google Variations
What was Hadoop written in ?
Java (software platform)
Perl
Java (programming language)
Lua (programming language)
Which of the following platforms does Hadoop run on ?
Bare metal
Debian
Cross-platform
Unix-like
Above the file systems comes the ________ engine, which consists of one Job Tracker, to which client applications submit MapReduce jobs.
MapReduce
Functional programming
__________ has the world’s largest Hadoop cluster.
Apple
Datamatics
None of the mentioned
All of the following accurately describe Hadoop, EXCEPT:
Open source
Real-time
Java-based
Distributed computing approach
What was Hadoop named after?
Creator Doug Cutting’s favorite circus act
Cutting’s high school rock band
The toy elephant of Cutting’s son
A sound Cutting’s laptop made during Hadoop’s development
The questions till now were:
The logo for Hadoop is:
HIVE provides an SQL-like language called
SQL HIVE
Hive QL
DB QL
HIVE DATA
Out of these, which technique can be used for merging data from different sources based on a specific key if no memory restrictions are present?
Outer join
Reduce-side join
Map Reduce CO Group join
inner join
By default, Hive stores metadata in an embedded
SQL
HIVE
HDFS
APACHE DERBY
Which is not TRUE in terms of hive ?
Which is not TRUE in terms of hive ?
It provides tools to enable easy data ETL
It offers real-time queries and row level updates
It can operate on compressed data stored into Hadoop ecosystem
What is the url for checking the status of namenode
http://localhost:50070/
http://localhost:8020/
http://localhost:5007/8/
http://localhost:50077/
Why do we use the SSH in Hadoop Cluster?
To perform the Passwordless authentication
To establish the communication between Master Node and Slave Node
Both 1 and 2
Neither 1 nor 2
What action occurs automatically on a cluster when a DataNode is marked as dead?
The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.
The next time a client submits job that requires blocks from the dead DataNode, the Resouce Manager receives no heart beats from the DataNode. The Resouce Manager tells the NameNode that the DataNode is dead, which triggers block re-replication on the cluSTER
The replication factor of the files which had blocks stored on the dead DataNode is temporarily reduced, until the dead DataNode is recovered and returned to the cluster.
The NameNode informs the client which write the blocks that are no longer available; the client then re-writes the blocks to a different DataNode.
Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFSdefault block size to 64MB?
The block size of files in the cluster can be determined as the block is written.
The block size of files in the cluster will all be multiples of 64MB
The block size of files in the cluster will all at least be 64MB.
The block size of files in the cluster will all be the exactly 64MB
What are the commands we use to remove the non empty directory?
rmdir dirname
rm -rf dirname
rmdir -r dirname
rm -r dirname
In which configuration file do we need to mention the details of the master node while setting up the multinode cluster
hdfs-site.xml
CORE-site.xml
hdfs-site.xml
In which configuration file do we set the parameter fs.default.name?
core-site.xml
MAPREDUCE-site.xml
YARN-site.xml
HDFS-site.xml
What is the comand we use to make namenode come out of safe mode?
hadoop dfsadmin -safemode leave
hadoop admin -safemode leave
hdfs dfsadmin -safemode leave
Both (a) and (c)
Hadoop can be run on which modes?
Standalone mode,Pseudo-distributed mode & Fully distributed mode
Pseudo-distributed mode & Fully distributed mode
Fully distributed mode
LOCAL MODE
Which of the following are not true?
In standalone no daemons will be running
In Pseudo distributed mode no daemons will be running
In fully distributed mode all the daemons will be running on same machine
2 and 3
