Big Data and hadoop

Which of the following is NOT one of the 5 Vs of Big Data?

• Volume

• Value

•  Validation

• Veracity

In Big Data analytics, which type of data lacks a predefined format and includes elements like social media posts and videos?

• Structured

• Unstructured

• Semi-structured

• Real-time

What is the primary function of Hadoop in Big Data analytics?

• Data visualization and reporting

• Distributed storage and processing of large datasets

• Data governance and quality control

• Real-time analytics

Which component of Hadoop is responsible for storing data across multiple nodes in a cluster?

• HDFS

• MapReduce

• Hive

• NTFS

What does MapReduce in the Hadoop ecosystem do?

• Stores massive data across servers

• Breaks down data tasks into Map and Reduce phases for distributed processing

• Provides metadata for clusters

• Visualizes data in real-time

In Hadoop, which component serves as the 'Master Node'?

• DataNode

• NameNode

• Secondary Node

• HDFS

HDFS stands for

• Hadoop Data Flow Structure

• Hadoop Definition File Storage

• Hadoop Distributed File System

• Hadoop disturbed format system

What is a 'block' in the context of Hadoop's HDFS?

• • A unit of memory allocation for high-speed processing

• A chunk of data split for distributed storage across nodes

• A set of files stored in relational databases

• An archive of metadata

What is the default replication factor for data blocks in HDFS to ensure fault tolerance?

• 2

• 3

• 4

• 5

Which term describes the process of organizing data by key in MapReduce before sending it to the Reduce phase?

• Mapping

• Shuffling and Sorting

• Reducing

• Output Writing