Hadoop

Hadoop Mastery Quiz

Test your knowledge of Hadoop and HDFS with this engaging quiz! Whether you're a beginner or an experienced practitioner, this quiz will challenge your understanding of key concepts and practices in Hadoop.

Key topics include:

HDFS architecture
Data nodes and name nodes
Replication factors
Distributed cache

11 Questions3 MinutesCreated by CodingBear507

1. When a client contacts the namenode for accessing a file, the namenode responds with which of the following?

Size of the file requested

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

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

Block ID of the file requested

2. The default replication factor for HDFS file system in Hadoop is which of the following?

3. When a backup node is used in a cluster there is no need of which of the following?

Secondary name node

Rack awareness

Check point node

Secondary data node

4. Which of the following are among the duties of the Data Nodes in HDFS?

None of these options is correct.

Maintain the file system tree and metadata for all files and directories

Store and retrieve blocks when told to by clients or the NameNode.

Control the execution of an individual map task or a reduce task

Manage the file system namespace.

5. The client reading the data from HDFS filesystem in Hadoop does which of the following?

Gets only the block locations form the namenode

Gets both the data and block location from the namenode

Gets the block location from the datanode

Gets the data from the namenode

6. The namenode loses its only copy of fsimage file. We can recover this from which of the following?

Secondary Namenode

Datanodes

It can’t be recovered

Checkpoint node

7. "Under replication" in HDFS means which of the following?

Replication process is very slow in the data nodes.

No replication is happening in the data nodes.

The frequency of replication in data nodes is very low.

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

8. The datanode and namenode are, respectiviley, which of the following?

Master and worker nodes

Both are worker nodes

None of these

Worker and Master nodes

9. What is distributed cache?

The distributed cache is special component on data node that will cache frequently used data for faster client response. It is used during map step.

The distributed cache is a component that caches java objects.

The distributed cache is special component on name node that will cache frequently used data for faster client response. It is used during reduce step.

The distributed cache is a component that allows developers to deploy jars for Map-Reduce processing.

10. All the files in a directory in HDFS can be merged together using which of the following?

Get merge

Merge all

Remerge

Put merge

11. The source of HDFS architecture in Hadoop originated as which of the following?

Azure distributed filesystem

Yahoo distributed filesystem

Google distributed filesystem

Facebook distributed filesystem

Hadoop

Hadoop Mastery Quiz

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