Podcast
Questions and Answers
What is the estimated amount of data the world will generate by 2025?
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?
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?
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?
What percentage of global data is stored in relational databases?
In Hadoop Distributed File System (HDFS), how is data managed across servers?
In Hadoop Distributed File System (HDFS), how is data managed across servers?
What is a defining feature of a Datalake?
What is a defining feature of a Datalake?
What is the main benefit of using NoSQL databases for Big Data?
What is the main benefit of using NoSQL databases for Big Data?
Which aspect of Big Data refers to the authenticity and trustworthiness of data?
Which aspect of Big Data refers to the authenticity and trustworthiness of data?
Flashcards
What is Big Data?
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?
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?
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?
What does the 'V' in Volume stand for in the 5Vs of Big Data?
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What does the 'V' in Veracity stand for in the 5Vs of Big Data?
What does the 'V' in Veracity stand for in the 5Vs of Big Data?
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What does the 'V' in Value stand for in the 5Vs of Big Data?
What does the 'V' in Value stand for in the 5Vs of Big Data?
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What is HDFS (Hadoop Distributed File System)?
What is HDFS (Hadoop Distributed File System)?
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What are Datalakes?
What are Datalakes?
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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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