Podcast
Questions and Answers
What percentage of global data is estimated to be stored in relational databases?
What percentage of global data is estimated to be stored in relational databases?
- Over 80%
- Exactly 25%
- About 50%
- Less than 20% (correct)
Which component of the 5 Vs of Big Data refers to the diversity of data types?
Which component of the 5 Vs of Big Data refers to the diversity of data types?
- Veracity
- Value
- Volume
- Variety (correct)
Which of the following describes the primary purpose of a data lake?
Which of the following describes the primary purpose of a data lake?
- To process structured data exclusively
- To store raw data without transformation for long-term analysis (correct)
- To facilitate real-time data processing exclusively
- To ensure data authenticity and trustworthiness
What technology is specifically designed to handle large volumes of unstructured or semi-structured data across multiple servers?
What technology is specifically designed to handle large volumes of unstructured or semi-structured data across multiple servers?
Which statement about the global volume of data is accurate?
Which statement about the global volume of data is accurate?
What is the primary function of the 'velocity' aspect of Big Data?
What is the primary function of the 'velocity' aspect of Big Data?
What represents the main sources of data of the modern digital age?
What represents the main sources of data of the modern digital age?
In the context of Big Data, what does 'veracity' refer to?
In the context of Big Data, what does 'veracity' refer to?
Flashcards
What is Big Data?
What is Big Data?
The massive amount of data generated every day, reaching zettabytes (ZB) in scale. ZB is equivalent to a billion gigabytes.
What are the 5 Vs of Big Data?
What are the 5 Vs of Big Data?
The five characteristics of Big Data that make it unique: Volume (size), Velocity (speed), Variety (types), Veracity (truthfulness), and Value (purpose).
How does Hadoop Distributed File System (HDFS) store Big Data?
How does Hadoop Distributed File System (HDFS) store Big Data?
A storage system designed for massive volumes of data spread across multiple servers, dividing data into blocks and replicating them for reliability.
What is a Data Lake?
What is a Data Lake?
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What is a NoSQL database?
What is a NoSQL database?
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What is Big Data Storage?
What is Big Data Storage?
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What are the sources of Big Data?
What are the sources of Big Data?
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How much data is stored in Relational Databases?
How much data is stored in Relational Databases?
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Study Notes
Big Data
- Data is crucial for decision-making across all business aspects
- 2025 global data generation estimate: 175 zettabytes (ZB)
- 2010 global data generation: 2 ZB
- Daily global internet data generation: ~2.5 million GB
- Recent 2 years account for 90% of data generated
Five Vs of Big Data
- Velocity: Batch, near real-time, real-time, streaming data
- Variety: Structured, unstructured, semi-structured data
- Volume: Terabytes, records, transactions
- Veracity: Trustworthiness, authenticity, origin, reputation
- Value: Statistical, events, correlations, hypothetical scenarios
Data Sources
- Facebook: 500,000 tweets per minute
- Twitter: 500,000 tweets per minute
- Instagram: 347,222 posts per minute
- IoT: 75 million connected devices generating data
Data Storage
- Less than 20% of global data stored in Relational Databases
- 80% of data is unstructured (text, images, video)
- Unstructured data is stored in Big Data Architectures, cloud, and NoSQL databases
Big Data Storage (HDFS)
- Handles large volumes of data across multiple servers
- Divides data into small blocks (typically 128 MB or 256 MB)
- Distributes blocks across various nodes (servers)
- Provides high data redundancy for fault tolerance (data copies)
- Ideal for large amounts of unstructured or semi-structured data
Data Lakes
- Centralized repository for all data types (structured, semi-structured, unstructured)
- Stores data as raw data without transformation
- Useful for long-term analysis or when analysis type isn't known beforehand
- Ideal for large volumes of diverse, raw data
NoSQL Databases
- Used for storing unstructured data.
- Flexibility, speed, and good for unstructured data
Relational Databases (SQL)
- Structured, consistent, integrity-driven data stores
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Description
This quiz covers essential concepts of Big Data, including its significance in decision-making and the staggering growth of data generation. Explore the Five Vs of Big Data and understand different data sources and storage solutions. Test your knowledge on how businesses utilize data in today's digital age.
