Big Data Overview and Characteristics
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Questions and Answers

What is the estimated amount of data the world will generate by 2025?

  • 500 zettabytes
  • 175 zettabytes (correct)
  • 2 zettabytes
  • 1 trillion gigabytes

    • Which of the following describes a characteristic of 'Velocity' in the context of Big Data?

  • The size of the overall data collected
  • The types of data formats used
  • The trustworthiness of the data
  • The speed at which data is generated and processed (correct)

    • Which statement regarding the sources of data is accurate?

  • Twitter generates 500,000 tweets per minute. (correct)
  • Facebook generates fewer posts than Instagram.
  • IoT generates less data than social media.
  • HTTP requests generate the majority of global data.

    • What percentage of global data is stored in relational databases?

    <p>Less than 20% (D)</p> Signup and view all the answers

    In Hadoop Distributed File System (HDFS), how is data managed across servers?

    <p>Data is divided into small blocks and distributed. (D)</p> Signup and view all the answers

    What is a defining feature of a Datalake?

    <p>Stores raw data without any transformation. (B)</p> Signup and view all the answers

    What is the main benefit of using NoSQL databases for Big Data?

    <p>Optimized for large volumes of unstructured data. (A)</p> Signup and view all the answers

    Which aspect of Big Data refers to the authenticity and trustworthiness of data?

    <p>Veracity (D)</p> Signup and view all the answers

    Flashcards

    What is Big Data?

    The massive amount of data created and collected every day by individuals, businesses, and devices.

    What does the 'V' in Velocity stand for in the 5Vs of Big Data?

    The speed at which data is generated and processed.

    What does the 'V' in Variety stand for in the 5Vs of Big Data?

    The diverse variety of data formats, including structured, unstructured, and semi-structured.

    What does the 'V' in Volume stand for in the 5Vs of Big Data?

    The immense volume of data generated and stored.

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    What does the 'V' in Veracity stand for in the 5Vs of Big Data?

    The accuracy, reliability, and trustworthiness of the data.

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    What does the 'V' in Value stand for in the 5Vs of Big Data?

    The potential usefulness and value that can be derived from the data.

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    What is HDFS (Hadoop Distributed File System)?

    A distributed file system designed to store and process large volumes of data across multiple servers.

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    What are Datalakes?

    A central storage location where data is kept in its raw format, without any initial transformation, for various types of analysis.

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    Study Notes

    Big Data

    • Data is crucial for decision-making in all business areas.
    • Data volume is projected to reach 175 zettabytes (ZB) (1 billion gigabytes) by 2025, significantly increasing from 2010 levels.
    • Daily internet data generation is estimated at 2.5 million gigabytes.
    • 90% of data was generated in the last two years.

    The 5 Vs of Big Data

    • Velocity: Data streams arrive in batch, near real-time, real-time, and streaming formats.
    • Variety: Data exists in structured, unstructured, and semi-structured formats.
    • Volume: Data is measured in terabytes, records, and transactions.
    • Veracity: Trustworthiness, authenticity, origin, and reputation.
    • Value: Statistical patterns, events, correlations, and potential insights.

    Data Sources

    • Key sources include Facebook (500,000 tweets per minute), Twitter, Instagram (347,222 posts per minute), and Internet of Things (IoT) devices (75 million connected devices generating data).

    Data Storage

    • Less than 20% of data is stored in relational databases (databases used for structured data such as banks and customers).
    • 80% of data is unstructured (text, images, video), stored in NoSQL and cloud-based big data architectures.

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    Related Documents

    Big Data Overview PDF

    Description

    Explore the essential concepts of Big Data, including the critical role data plays in decision-making across businesses. Understand the 5 Vs of Big Data: Velocity, Variety, Volume, Veracity, and Value, and learn about the diverse sources and storage options for vast data volumes.

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