18 Questions
What are the main characteristics of NoSQL databases?
High scalability, high availability, and fault tolerance
What is a key focus of most NoSQL databases?
Performance over transaction consistency
Why do distributed databases make copies of data elements at multiple nodes?
To ensure high availability and fault tolerance
Which ANSI/SPARC architecture defines three levels of data abstraction?
External, conceptual, and internal
What does the external model represent in data modeling?
End user's view of the data environment
Which level of data abstraction provides a global view of the entire database?
Conceptual model
What is the main purpose of the hierarchical model in data management?
To manage large amounts of data for complex manufacturing projects
Which of the following is a key feature of the network database model?
Schema
What is the equivalent of a file system's record type in the hierarchical model?
Segment
Which model was developed to resolve critical shortcomings of the hierarchical model and improve database performance?
Network Model
What does Subschema define in data management?
The portion of the database viewed by the database administrator
Which type of relationship is generally used in modern data models according to the text?
One-to-many (1:M) relationship
What does 'Velocity' refer to in the context of data processing?
The need to process data quickly for insights
Which of the following is a general characteristic of NoSQL databases?
They provide high scalability and fault tolerance
What is a key advantage of NoSQL databases with regards to distributed database architecture?
They generally use a distributed database node
Why are NoSQL databases considered suited for sparse data?
Because they support very large amounts of sparse data
Which of the following is NOT a characteristic of NoSQL databases?
High transaction consistency
What role does Velocity play in the context of data processing?
Processing data quickly for generating information
Explore the key features and characteristics of NoSQL databases, including their emphasis on scalability, availability, and fault tolerance. Learn about their design for web operations and focus on performance over transaction consistency.
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