Podcast
Questions and Answers
What are the main characteristics of NoSQL databases?
What are the main characteristics of NoSQL databases?
- Dependence on traditional SQL queries
- High scalability, high availability, and fault tolerance (correct)
- Limited scalability and availability
- Strict data consistency and low performance
What is a key focus of most NoSQL databases?
What is a key focus of most NoSQL databases?
- Performance over transaction consistency (correct)
- Transaction consistency over performance
- Data security over performance
- Schema enforcement over performance
Why do distributed databases make copies of data elements at multiple nodes?
Why do distributed databases make copies of data elements at multiple nodes?
- To ensure high availability and fault tolerance (correct)
- To increase data consistency
- To simplify the querying process
- To reduce the storage cost
Which ANSI/SPARC architecture defines three levels of data abstraction?
Which ANSI/SPARC architecture defines three levels of data abstraction?
What does the external model represent in data modeling?
What does the external model represent in data modeling?
Which level of data abstraction provides a global view of the entire database?
Which level of data abstraction provides a global view of the entire database?
What is the main purpose of the hierarchical model in data management?
What is the main purpose of the hierarchical model in data management?
Which of the following is a key feature of the network database model?
Which of the following is a key feature of the network database model?
What is the equivalent of a file system's record type in the hierarchical model?
What is the equivalent of a file system's record type in the hierarchical model?
Which model was developed to resolve critical shortcomings of the hierarchical model and improve database performance?
Which model was developed to resolve critical shortcomings of the hierarchical model and improve database performance?
What does Subschema define in data management?
What does Subschema define in data management?
Which type of relationship is generally used in modern data models according to the text?
Which type of relationship is generally used in modern data models according to the text?
What does 'Velocity' refer to in the context of data processing?
What does 'Velocity' refer to in the context of data processing?
Which of the following is a general characteristic of NoSQL databases?
Which of the following is a general characteristic of NoSQL databases?
What is a key advantage of NoSQL databases with regards to distributed database architecture?
What is a key advantage of NoSQL databases with regards to distributed database architecture?
Why are NoSQL databases considered suited for sparse data?
Why are NoSQL databases considered suited for sparse data?
Which of the following is NOT a characteristic of NoSQL databases?
Which of the following is NOT a characteristic of NoSQL databases?
What role does Velocity play in the context of data processing?
What role does Velocity play in the context of data processing?
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