Practice Hadoop Filesystem Hdfs Multiple Choice Questions with Answers Quiz-1

Q.1.

A ________ serves as the master and there is only one NameNode per cluster.

a) Data Node
b) NameNode
c) Data block
d) Replication

Explanation

Q.2.

Point out the correct statement.

a) DataNode is the slave/worker node and holds the user data in the form of Data Blocks
b) Each incoming file is broken into 32 MB by default
c) Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance
d) None of the mentioned

Explanation

Q.3.

HDFS works in a __________ fashion.

a) master-worker
b) master-slave
c) worker/slave
d) all of the mentioned

Explanation

Q.4.

________ NameNode is used when the Primary NameNode goes down.

a) Rack
b) Data
c) Secondary
d) None of the mentioned

Explanation

Q.5.

Point out the wrong statement.

a) Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level
b) Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode
c) User data is stored on the local file system of DataNodes
d) DataNode is aware of the files to which the blocks stored on it belong to

Explanation

Q.6.

Which of the following scenario may not be a good fit for HDFS?

a) HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
b) HDFS is suitable for storing data related to applications requiring low latency data access
c) HDFS is suitable for storing data related to applications requiring low latency data access
d) None of the mentioned

Explanation

Q.7.

The need for data replication can arise in various scenarios like ____________

a) Replication Factor is changed
b) DataNode goes down
c) Data Blocks get corrupted
d) All of the mentioned

Explanation

Q.8.

________ is the slave/worker node and holds the user data in the form of Data Blocks.

a) DataNode
b) NameNode
c) Data block
d) Replication

Explanation

Q.9.

HDFS provides a command line interface called __________ used to interact with HDFS.

a) “HDFS Shell”
b) “FS Shell”
c) “DFS Shell”
d) None of the mentioned

Explanation

Q.10.

HDFS is implemented in _____________ programming language.

a) C++
b) Java
c) Scala
d) None of the mentioned

Explanation

Q.11.

For YARN, the ___________ Manager UI provides host and port information.

a) Data Node
b) NameNode
c) Resource
d) Replication

Explanation

Q.12.

Point out the correct statement.

a) The Hadoop framework publishes the job flow status to an internally running web server on the master nodes of the Hadoop cluster
b) Each incoming file is broken into 32 MB by default
c) Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance
d) None of the mentioned

Explanation

Q.13.

For ________ the HBase Master UI provides information about the HBase Master uptime.

a) HBase
b) Oozie
c) Kafka
d) All of the mentioned

Explanation

Q.14.

During start up, the ___________ loads the file system state from the fsimage and the edits log file.

a) DataNode
b) NameNode
c) ActionNode
d) None of the mentioned

Explanation

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