Nonrelational Databases: Key-Value Pair
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Questions and Answers

What is one of the most important services provided by operational databases?

  • Persistence (correct)
  • Data Analysis
  • Availability
  • Speed

    • What does persistence guarantee in the context of operational databases?

  • High volume data storage
  • Database speed
  • Data encryption
  • Data accuracy (correct)

    • Why is combining big data analysis with operational data sources important?

  • To reduce the volume of data
  • To solve specific data problems effectively (correct)
  • To isolate big data
  • To speed up data processing

    • Why is it essential to consider combining big data with operational data sources?

    <p>To leverage high-volume data effectively (C)</p> Signup and view all the answers

    Which term refers to databases also known as data stores in the text?

    <p>Operational databases (B)</p> Signup and view all the answers

    What happens when data is stored in an operational database with persistence?

    <p>Data is protected and won't be changed without permission (A)</p> Signup and view all the answers

    What feature of PostgreSQL allows users to handle 'objects' within the relational schema?

    <p>Foreign keys (A)</p> Signup and view all the answers

    Which aspect of PostgreSQL contributes to its extensibility?

    <p>Data types (C)</p> Signup and view all the answers

    What is a key advantage of PostgreSQL over rigid proprietary products?

    <p>High level of customization (B)</p> Signup and view all the answers

    Which database feature allows PostgreSQL users to automatically start stored procedures?

    <p>Triggers (C)</p> Signup and view all the answers

    What flexibility does the PostgreSQL license offer in terms of modifications?

    <p>Permission for both private and community sharing of modifications (D)</p> Signup and view all the answers

    Which database design approach do nonrelational databases differ from?

    <p>'Table/key' model in RDBMSs (A)</p> Signup and view all the answers

    What is a key-value pair (KVP) database known for?

    <p>Not being typed (C)</p> Signup and view all the answers

    Why do key-value pair (KVP) databases require implementers to think about data placement, replication, and fault tolerance?

    <p>As these aspects are not controlled by the technology itself (D)</p> Signup and view all the answers

    In a big data implementation, what can happen as the number of users increases according to the text?

    <p>The number of key-value pairs associated with users increasing exponentially (C)</p> Signup and view all the answers

    Which feature distinguishes key-value pair (KVP) databases from Relational Database Management Systems (RDBMSs) according to the text?

    <p>Storing data as strings (D)</p> Signup and view all the answers

    What is one aspect that key-value pair (KVP) databases lack compared to other types of databases according to the text?

    <p>ACID capability (C)</p> Signup and view all the answers

    What is the main difference between 2D and 3D objects?

    <p>2D objects have length and width, while 3D objects have length, width, and depth (B)</p> Signup and view all the answers

    What defines a 2.5D object?

    <p>2.5D objects are 2D objects with elevation as the extra dimension (D)</p> Signup and view all the answers

    What atomic elements make up spatial databases?

    <p>Lines, points, and polygons (C)</p> Signup and view all the answers

    What are most 2.5D spatial databases often referred to as?

    <p>Geographic Information Systems (GISs) (C)</p> Signup and view all the answers

    Why were spatial indices created for spatial data objects?

    <p>To support ad hoc queries and visual representations of the database contents (D)</p> Signup and view all the answers

    Which open source project is mentioned in the text as being maintained by Refractions Research?

    <p>PostGIS (C)</p> Signup and view all the answers

    What is the purpose of using the generic string representation of key-value pairs (KVP)?

    <p>To provide flexibility and readability when organizing data in a key-value database (D)</p> Signup and view all the answers

    What is a key feature of Riak key-value database that makes it suitable for high-volume environments?

    <p>Lightweight design (A)</p> Signup and view all the answers

    How does Riak organize collections of keys and values?

    <p>Using 'buckets' (C)</p> Signup and view all the answers

    What is a unique characteristic of Riak clusters in terms of architecture?

    <p>Peer-to-peer arrangement (D)</p> Signup and view all the answers

    How does the performance of Riak clusters scale according to the text?

    <p>Larger clusters perform better and faster than smaller clusters (A)</p> Signup and view all the answers

    What type of license is Riak available under?

    <p>Apache Software License v2.0 (B)</p> Signup and view all the answers

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