17 Questions
What is the basis for the identification and high-level description of the main data objects in a database?
Conceptual Schema
Which database model operates at the lowest level of abstraction?
Physical Model
In database design, what requires the designer to match characteristics and constraints from the conceptual model to the selected implementation model?
Internal Schema
Which database schema depicts a specific representation using database constructs supported by the chosen database?
Internal Schema
What aspect of the physical model makes it both software and hardware dependent?
Definition of physical storage devices
What are the main features of NoSQL databases?
High scalability, high availability, and fault tolerance
How do NoSQL databases handle adding capacity during high demand?
By adding nodes to the distributed database transparently and without downtime
Why are most NoSQL databases geared toward performance rather than transaction consistency?
Due to the challenge of enforcing data consistency in very large distributed databases
What do distributed databases do to ensure high availability and fault tolerance?
They automatically make copies of data elements at multiple nodes
What are the three levels of data abstraction defined by ANSI/SPARC architecture?
External, conceptual, internal
What does the external model represent?
The end user's view of the data environment
What does the term 'Velocity' refer to in the context of data?
Speed of data processing
Which of the following is a general characteristic of NoSQL databases?
High scalability and fault tolerance
What is one advantage of NoSQL databases regarding distributed database architecture?
Employ multiple distributed database nodes
In what way are NoSQL databases geared towards when considering performance?
Performance over transaction consistency
What type of data are NoSQL databases particularly suited for handling?
Sparse data with few attributes but many instances
Which characteristic is NOT typically associated with NoSQL databases?
Relational model usage
Explore key concepts in big data, including Velocity, Variety, and NoSQL databases. Understand the importance of processing data quickly and efficiently storing structured and unstructured data. Learn how big data is utilized in various applications like Amazon, Facebook, YouTube, and Google Maps.
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