Q 1 - HDFS can be accessed over HTTP using

A - viewfs URI scheme

B - webhdfs URI scheme

C - wasb URI scheme

D - HDFS ftp

Q 2 - What is are true about HDFS?

A - HDFS filesystem can be mounted on a local client’s Filesystem using NFS.

B - HDFS filesystem can never be mounted on a local client’s Filesystem.

C - You can edit a existing record in HDFS file which is already mounted using NFS.

D - You cannot append to a HDFS file which is mounted using NFS.

Q 3 - The client reading the data from HDFS filesystem in Hadoop

A - gets the data from the namenode

B - gets the block location from the datanode

C - gets only the block locations form the namenode

D - gets both the data and block location from the namenode

Q 4 - Which scenario demands highest bandwidth for data transfer between nodes in Hadoop?

A - Different nodes on the same rack

B - Nodes on different racks in the same data center.

C - Nodes in different data centers

D - Data on the same node.

Q 5 - The current block location of HDFS where data is being written to,

A - is visible to the client requesting for it.

B - Block locations are never visible to client requests.

C - May or may not be visible to the reader.

D - becomes visible only after the buffered data is committed.

Q 6 - Which of this is not a scheduler options available with YARN?

A - Optimal Scheduler

B - FIFO scheduler

C - Capacity scheduler

D - Fair scheduler

Q 7 - Which of the following is not a Hadoop operation mode?

A - Pseudo distributed mode

B - Globally distributed mode

C - Stand alone mode

D - Fully-Distributed mode

Q 8 - The difference between standalone and pseudo-distributed mode is

A - Stand alone cannot use map reduce

B - Stand alone has a single java process running in it.

C - Pseudo distributed mode does not use HDFS

D - Pseudo distributed mode needs two or more physical machines.

Q 9 - The hadoop frame work is written in

A - C++

B - Python

C - Java

D - GO

Q 10 - The hdfs command to create the copy of a file from a local system is

A - CopyFromLocal

B - copyfromlocal

C - CopyLocal

D - copyFromLocal

Q 11 - The hadfs command put is used to

A - Copy files from local file system to HDFS.

B - Copy files or directories from local file system to HDFS.

C - Copy files from from HDFS to local filesystem.

D - Copy files or directories from HDFS to local filesystem.

Q 12 - Underreplication in HDFS means-

A - No replication is happening in the data nodes.

B - Replication process is very slow in the data nodes.

C - The frequency of replication in data nodes is very low.

D - The number of replicated copies is less than as specified by the replication factor.

Q 13 - When the namenode finds that some blocks are over replicated, it

A - Stops the replication job in the entire hdfs file system.

B - It slows down the replication process for those blocks

C - It deletes the extra blocks.

D - It leaves the extra blocks as it is.

Q 14 - Which of the below property gets configured on core-site.xml ?

A - Replication factor

B - Directory names to store hdfs files.

C - Host and port where MapReduce task runs.

D - Java Environment variables.

Q 15 - Which of the below property gets configured on hdfs-site.xml ?

A - Replication factor

B - Directory names to store hdfs files.

C - Host and port where MapReduce task runs.

D - Java Environment variables.

Q 16 - Which of the below property gets configured on mapred-site.xml ?

A - Replication factor

B - Directory names to store hdfs files.

C - Host and port where MapReduce task runs.

D - Java Environment variables.

Q 17 - Which of the below property gets configured on hadoop-env.sh?

A - Replication factor

B - Directory names to store hdfs files

C - Host and port where MapReduce task runs

D - Java Environment variables.

Q 18 - The command to check if Hadoop is up and running is −

A - Jsp

B - Jps

C - Hadoop fs –test

D - None

Q 19 - The information mapping data blocks with their corresponding files is stored in

A - Data node

B - Job Tracker

C - Task Tracker

D - Namenode

Q 20 - The file in Namenode which stores the information mapping the data block location with file name is −

A - dfsimage

B - nameimage

C - fsimage

D - image

Q 21 - The namenode knows that the datanode is active using a mechanism known as

A - heartbeats

B - datapulse

C - h-signal

D - Active-pulse

Q 22 - The nature of hardware for the namenode should be

A - Superior than commodity grade

B - Commodity grade

C - Does not matter

D - Just have more Ram than each of the data nodes

Q 23 - In Hadoop, Snappy and LZO are examples of

A - Mechanisms of file transport between data nodes

B - Mechanisms of data compression

C - Mechanisms of data Replication

D - Mechanisms of Data synchronization

Q 24 - Which of the below apache system deals with ingesting streaming data to hadoop

A - Ozie

B - Kafka

C - Flume

D - Hive

Q 25 - The input split used in MapReduce indicates

A - The average size of the data blocks used as input for the program

B - The location details of where the first whole record in a block begins and the last whole record in the block ends.

C - Splitting the input data to a MapReduce program into a size already configured in the mapred-site.xml

D - None of these

Q 26 - The output of a mapper task is

A - The Key-value pair of all the records of the dataset.

B - The Key-value pair of all the records from the input split processed by the mapper

C - Only the sorted Keys from the input split

D - The number of rows processed by the mapper task.

Q 27 - The role of a Journal node is to

A - Report the location of the blocks in a data node

B - Report the edit log information of the blocks in the data node.

C - Report the Schedules when the jobs are going to run

D - Report the activity of various components handled by resource manager

Q 28 - The Zookeeper

A - Detects the failure of the namenode and elects a new namenode.

B - Detects the failure of datanodes and elects a new datanode.

C - Prevents the hardware from overheating by shutting them down.

D - Maintains a list of all the components IP address of the Hadoop cluster.

Q 29 - If the IP address or hostname of a datanode changes

A - The namenode updates the mapping between file name and block name

B - The namenode need not update mapping between file name and block name

C - The data in that data node is lost forever

D - There namenode has to be restarted

Q 30 - When a client contacts the namenode for accessing a file, the namenode responds with

A - Size of the file requested.

B - Block ID of the file requested.

C - Block ID and hostname of any one of the data nodes containing that block.

D - Block ID and hostname of all the data nodes containing that block.

Q 31 - HDFS stands for

A - Highly distributed file system.

B - Hadoop directed file system

C - Highly distributed file shell

D - Hadoop distributed file system.

Q 32 - The Hadoop tool used for uniformly spreading the data across the data nodes is named −

A - Scheduler

B - Balancer

C - Spreader

D - Reporter