Annale Big Data

Choose the correct statement:

• Hadoop is ideal for processing small volumes of data

• Hadoop is used for vertical scaling

• We avoid having small files in HDFS

• None of the above

(Multiple answers) Hadoop Core (in Hadoop 2.0) is made of the following services:

• YARN

• HDFS

• HBase

• MapReduce

____ is the cluster manager of Hadoop that allows multiple data processing engines to run

• YARN

• Hive

• Kubernetes

• MapReduce

What does the term “open source” mean in Apache Projects?

• It refers to software that is free of charge.

• It means the software's source code is publicly available for anyone to view, use, modify, and distribute.

• It implies that the software is only accessible to a select group of developers.

• It indicates that the software is not suitable for commercial use.

The ____ is the component that allocates resources to the applications in the cluster.

• NodeManager

• ResourceManager

• ApplicationMaster

• All of the above

Choose the correct statement:

• All of the above

• YARN tries to place data and computation as close as possible

• YARN allows to manage access rights on HDFS

• YARN only launches MapReduce jobs

____ can be described as a framework used to develop Hadoop-based applications that can process massive amounts of data.

• MapReduce

• HBase

• Oozie

• All of the above

The ____ is the master component of HDFS.

• DataNode

• NameNode

• ZooKeeper

• JournalNode

Choose the correct statement:

• HDFS files are broken into 3 splits by default

• The DataNode is a worker that holds data in the form of blocks

• The data blocks are replicated a minimal number of times in order to save space

• None of the above

The ____ NameNode is used when the active NameNode goes down in a Highly Available environment.

• Rack

• Data

• Secondary

• None of the above