Exam DP-200 topic 6 question 46 discussion

Actual exam question from Microsoft's DP-200

Question #: 46
Topic #: 6

You have to design a Hadoop Distributed File System architecture. You are going to be using Microsoft Azure Data Lake as the data storage repository. You have to ensure the data repository has a resilient data schema.
Which of the following would be used to run operations on files and directories on the file system?

A. DataNode
B. NameNode
C. PrimaryNode
D. SecondaryNode

Show Suggested Answer

Suggested Answer: B 🗳️
The file system namespace resides on the NameNode.
The Hadoop documentation mentions the following:

The File System Namespace -
HDFS supports a traditional hierarchical file organization. A user or an application can create directories and store files inside these directories. The file system namespace hierarchy is similar to most other existing file systems; one can create and remove files, move a file from one directory to another, or rename a file.
HDFS does not yet implement user quotas. HDFS does not support hard links or soft links. However, the HDFS architecture does not preclude implementing these features.
The NameNode maintains the file system namespace. Any change to the file system namespace or its properties is recorded by the NameNode. An application can specify the number of replicas of a file that should be maintained by HDFS. The number of copies of a file is called the replication factor of that file. This information is stored by the NameNode.
Since this is clear from the documentation, all other options are incorrect.
Reference:
https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html#NameNode+and+DataNodes

by designtshirt at April 4, 2025, 9:47 a.m.

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