LAB VIVA -DCDM

Which Python method is used to insert documents into a MongoDB collection?

• insert_documents()

• add_documents()

• insert_one()

• add_one()

What is the role of the 'combiner' in MapReduce?

• To filter the data

• To execute Map tasks

• To summarize the intermediate results

• To manage job scheduling

Which of the following tools is primarily used for managing Hadoop clusters?

• Spark

• YARN

• HDFS

• MapReduce

In MongoDB, collections are:

• SQL tables

• Sets of documents

• Rows in a table

• None of the above

Which command is used to start a Hadoop Distributed File System (HDFS)?

• start-dfs.sh

• hadoop-init.sh

• start-hadoop.sh

• init-hdfs.sh

In a Python MongoDB implementation, which function is used to connect to the database?

• MongoConnect()

• MongoClient()

• DatabaseConnect()

• MongoDBConnect()

Which API is used to manage and manipulate HDFS programmatically?

• HDFS API

• Hadoop API

• WebHDFS API

• MapReduce API

Which command is used to upload files from the local file system to HDFS?

• hadoop fs -put

• hadoop fs -copy

• hadoop fs -move

• hadoop fs -upload

What is the output of applying the map function in Python?

• A filtered list

• A list of mapped values

• A reduced value

• An error

In Hadoop, where is the intermediate data stored after the Map phase?

• HDFS

• YARN

• Local disk

• NoSQL database