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

August 7, 2021August 7, 2021 administrator

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

Resource

Excellent ! Your Answer is Correct. Explanation: All the metadata related to HDFS including the information about data nodes, files stored on HDFS, and Replication, etc. are stored and maintained on the NameNode.

Replication

NameNode

Data Node

HDFS is implemented in _____________ programming language.

August 7, 2021August 7, 2021 administrator

HDFS is implemented in _____________ programming language.

Java

Excellent ! Your Answer is Correct. Explanation: HDFS is implemented in Java and any computer which can run Java can host a NameNode/DataNode on it.

C++

Scala

None of the Option is Correct

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

August 7, 2021August 7, 2021 administrator

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

“FS Shell”

Excellent ! Your Answer is Correct. Explanation: The File System (FS) shell includes various shell-like commands that directly interact with the Hadoop Distributed File System (HDFS).

“HDFS Shell”

“DFS Shell”

None of the Option is Correct

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

August 7, 2021August 7, 2021 administrator

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

DataNode

Excellent ! Your Answer is Correct. Explanation: A DataNode stores data in the [HadoopFileSystem]. A functional filesystem has more than one DataNode, with data replicated across them.

NameNode

Data block

Replication

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

August 7, 2021August 7, 2021 administrator

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

All Options are Correct

Excellent ! Your Answer is Correct. Explanation: Data is replicated across different DataNodes to ensure a high degree of fault-tolerance.

Replication Factor is changed

DataNode goes down

Data Blocks get corrupted

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

August 7, 2021August 7, 2021 administrator

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

HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file

Excellent ! Your Answer is Correct. Explanation: HDFS can be used for storing archive data since it is cheaper as HDFS allows storing the data on low cost commodity hardware while ensuring a high degree of fault-tolerance.

HDFS is suitable for storing data related to applications requiring low latency data access

None of the Option is Correct

Point out the wrong statement.

August 7, 2021August 7, 2021 administrator

Point out the wrong statement.

DataNode is aware of the files to which the blocks stored on it belong to

Excellent ! Your Answer is Correct. Explanation: NameNode is aware of the files to which the blocks stored on it belong to.

User data is stored on the local file system of DataNodes

Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode

Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level

________ NameNode is used when the Primary NameNode goes down.

August 7, 2021August 7, 2021 administrator

________ NameNode is used when the Primary NameNode goes down.

Secondary

Excellent ! Your Answer is Correct. Explanation: Secondary namenode is used for all time availability and reliability.

Data

Rack

None of the Option is Correct

Point out the correct statement.

August 7, 2021August 7, 2021 administrator

Point out the correct statement.

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

Excellent ! Your Answer is Correct. Explanation: There can be any number of DataNodes in a Hadoop Cluster.

Each incoming file is broken into 32 MB by default

Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance

None of the Option is Correct

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

August 7, 2021August 7, 2021 administrator

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

NameNode

Data Node

Data block

Replication

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