Database Principles Chapter 16 Quiz: Big Data and NoSQL
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Questions and Answers

What does the term 'velocity' refer to in the context of big data?

  • The speed at which data is entered into the system and processed (correct)
  • The variations in the structure of data to be stored
  • The trustworthiness of the data
  • The quantity of data to be stored

    • How does 'scaling out' differ from 'scaling up' when managing big data?

  • Scaling out involves keeping the same number of systems, while scaling up involves exceeding the server capacity.
  • Scaling out involves migrating each system to a larger one, while scaling up involves spreading the workload across multiple servers.
  • Scaling out involves spreading the workload across multiple servers, while scaling up involves migrating each system to a larger one. (correct)
  • Scaling out involves exceeding the server capacity, while scaling up involves keeping the same number of systems.

    • Which characteristic of big data refers to variations in the structure of data to be stored?

  • Velocity
  • Variety (correct)
  • Veracity
  • Volume

    • What is meant by 'Veracity' in the context of big data?

    <p>The trustworthiness of the data</p> Signup and view all the answers

    In the Hadoop framework, what are the core components responsible for?

    <p>Operational functions within the framework</p> Signup and view all the answers

    Which type of databases focus on working with document storage like MongoDB?

    <p>NoSQL databases</p> Signup and view all the answers

    Which processing approach is focused on the input processing and requires analysis of the data stream as it enters the system?

    <p>Stream Processing</p> Signup and view all the answers

    What is the primary function of the Name Node in HDFS?

    <p>To contain file system metadata</p> Signup and view all the answers

    Which of the following is NOT a characteristic of Hadoop Distributed File System (HDFS)?

    <p>Low latency</p> Signup and view all the answers

    What is the primary function of the Map function in MapReduce?

    <p>To sort and filter data into a set of key-value pairs</p> Signup and view all the answers

    What is the purpose of the Job Tracker in MapReduce?

    <p>To act as a central control program</p> Signup and view all the answers

    Which NoSQL database model stores data as a collection of key-value pairs organised as buckets?

    <p>Key-value</p> Signup and view all the answers

    What is the primary purpose of the Reduce function in MapReduce?

    <p>To produce a single result</p> Signup and view all the answers

    What is Polyglot Persistence?

    <p>The coexistence of various data storage and management technologies</p> Signup and view all the answers

    What is the primary function of the Sqoop tool in Hadoop ecosystem?

    <p>To convert data back and forth between a relational database and the HDFS</p> Signup and view all the answers

    What is the purpose of the Feedback Loop Processing?

    <p>To analyse the data to produce actionable results</p> Signup and view all the answers

    Which statement best describes the relationship between document databases and key-value databases?

    <p>Document databases are a subtype of key-value databases, storing data in key-value pairs.</p> Signup and view all the answers

    Which statement is true regarding column-centric and row-centric storage in column-oriented databases?

    <p>Column-centric storage focuses on a single column across many rows, while row-centric storage focuses on all columns of a given set of rows.</p> Signup and view all the answers

    What does aggregate awareness refer to in the context of aggregate aware database models?

    <p>Data collected around a central topic or entity, making it relatively independent.</p> Signup and view all the answers

    What are the challenges faced by the relational model when dealing with Big Data?

    <p>The relational model struggles with data that is of such volume, velocity, variety, veracity, and value that it cannot adapt.</p> Signup and view all the answers

    What is a key feature of NewSQL databases?

    <p>NewSQL databases integrate features of both RDBMS and NoSQL databases with a highly distributed infrastructure.</p> Signup and view all the answers

    What is a column family in the context of column-oriented databases?

    <p>A column family is a group of columns treated as a single unit within a key-value pair.</p> Signup and view all the answers

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