Q 1 - In the secondary namenode the amount of memory needed is

A - Similar to that of primary node

B - Should be at least half of the primary node

C - Must be double of that of primary node

D - Depends only on the number of data nodes it is going to handle

Q 2 - The purpose of checkpoint node in a Hadoop cluster is to

A - Check if the namenode is active

B - Check if the fsimage file is in sync between namenode and secondary namenode

C - Merges the fsimage and edit log and uploads it back to active namenode.

D - Check which data nodes are unreachable.

Q 3 - When a backup node is used in a cluster there is no need of

A - Check point node

B - Secondary name node

C - Secondary data node

D - Rack awareness

Q 4 - Rack awareness in name node means

A - It is aware how many racks are available in the cluster

B - It is aware of the mapping between the node and the rack

C - It is aware of the number of nodes in each of the rack

D - It is aware which data nodes are unavailable in the cluster.

Q 5 - When a machine is declared as a datanode, the disk space in it

A - Can be used only for HDFS storage

B - Can be used for both HDFS and non-HDFs storage

C - Cannot be accessed by non-hadoop commands

D - cannot store text files.

Q 6 - When a file in HDFS is deleted by a user

A - it is lost forever

B - It goes to trash if configured.

C - It becomes hidden from the user but stays in the file system

D - File sin HDFS cannot be deleted

Q 7 - The source of HDFS architecture in Hadoop originated as

A - Google distributed filesystem

B - Yahoo distributed filesystem

C - Facebook distributed filesystem

D - Azure distributed filesystem

Q 8 - The inter process communication between different nodes in Hadoop uses

A - REST API

B - RPC

C - RMI

D - IP Exchange

Q 9 - The type of data Hadoop can deal with is

A - Structred

B - Semi-structured

C - Unstructured

D - All of the above

Q 10 - YARN stands for

A - Yahoo’s another resource name

B - Yet another resource negotiator

C - Yahoo’s archived Resource names

D - Yet another resource need.

Q 11 - The fully distributed mode of installation(without virtualization) needs a minimum of

A - 2 physical mashines

B - 3 Physical machines

C - 4 Physical machines

D - 1 Physical machine

Q 12 - Running Start-dfs.sh results in

A - Starting namenode and datanode

B - Starting namenode only

C - Starting datanode only

D - Starting namenode and resource manager

Q 13 - Which of the following is not a goal of HDFS?

A - Fault detection and recovery

B - Handle huge dataset

C - Prevent deletion of data

D - Provide high network bandwidth for data movement

Q 14 - The command “hadoop fs -test -z URI “ gives the result 0 if

A - if the path is a directory

B - if the path is a file

C - if the path is not empty

D - if the file is zero length

Q 15 - In HDFS the files cannot be

A - read

B - deleted

C - executed

D - Archived

Q 16 - hadoop fs –expunge

A - Gives the list of datanodes

B - Used to delete a file

C - Used to exchange a file between two datanodes.

D - Empties the trash.

Q 17 - All the files in a directory in HDFS can be merged together using

A - getmerge

B - putmerge

C - remerge

D - mergeall

Q 18 - The replication factor of a file in HDFS can be changed using

A - changerep

B - rerep

C - setrep

D - xrep

Q 19 - The comman used to copy a directory form one node to another in HDFS is

A - rcp

B - dcp

C - drcp

D - distcp

Q 20 - The archive file created in Hadoop always has the extension of

A - .hrc

B - .har

C - .hrh

D - .hrar

Q 21 - To unarchive an already archived file in haddop use the command

A - unrar

B - unhar

C - cp

D - cphar

Q 22 - The data from a remote hadoop cluster can

A - not be read by another hadoop cluster

B - be read using http

C - be read using hhtp

D - be read suing hftp

Q 23 - The purpose of starting namenode in the recovery mode is to

A - Recover a failed namenode

B - Recover a failed datanode

C - Recover data from one of the metadata storage locations

D - Recover data when there is only one metadata storage location

Q 24 - When you increase the number of files stored in HDFS, The memory required by namenode

A - Increases

B - Decreases

C - Remains unchanged

D - May increase or decrease

Q 25 - If we increase the size of files stored in HDFS without increasing the number of files, then the memory required by namenode

A - Decreases

B - Increases

C - Remains unchanged

D - May or may not increase

Q 26 - The current limiting factor to the size of a hadoop cluster is

A - Excess heat generated in data center

B - Upper limit of the network bandwidth

C - Upper limit of the RAM in namenode

D - 4000 data nodes

Q 27 - The decommission feature in hadoop is used for

A - Decommissioning the namenode

B - Decommissioning the data nodes

C - Decommissioning the secondary namenode.

D - Decommissioning the entire Hadoop cluster.

Q 28 - You can reserve the amount of disk usage in a data node by configuring the dfs.datanode.du.reserved in which of the following file

A - Hdfs-site.xml

B - Hdfs-defaukt.xml

C - Core-site.xml

D - Mapred-site.xml

Q 29 - The namenode loses its only copy of fsimage file. We can recover this from

A - Datanodes

B - Secondary namenode

C - Checkpoint node

D - Never

Q 30 - In a HDFS system with block size 64MB we store a file which is less than 64MB. Which of the following is true?

A - The file will consume 64MB

B - The file will consume more than 64MB

C - The file will consume less than 64MB.

D - Can not be predicted.

Q 31 - A running job in hadoop can

A - Be killed with a command

B - Can never be killed with a command

C - Can be killed only by shutting down the name node

D - Be paused and run again

Q 32 - The number of tasks a task tracker can accept depends on

A - Maximum memory available in the node

B - Not limited

C - Number of slots configured in it

D - As decided by the jobTracker