4th Quiz Characteristics of DDBMS

Which function analyzes data requests for syntax correctness

• Mapping

• Transformation

• Validation

• Formatting

What does query optimization aim to achieve

• Finding the best access strategy for data retrieval

• Increasing database size

• Simplifying the database structure

• Limiting user access

Which feature determines the location of data fragments

• Security

• I/O interface

• Backup and recovery

• Mapping

purpose of the I/O interface

• Read or write data to local storage

• Decompose requests

• Optimize queries

• Manage user permissions

ensures data privacy in a distributed database

• Backup and recovery

• Formatting

• Security

• Transaction management

What does concurrency control manage

• User authentication

• Data backup processes

• Data fragmentation

• Simultaneous data access and consistency

ensures transactions move between consistent states

• Formatting

• Data validation

• Transaction management

• Query optimization

How does a distributed database enhance reliability

• Centralizes all critical functions

• • Stops all operations during failures

• Requires manual intervention for recovery

• Continues operation even when some components fail

significance of backup and recovery

• Optimize query performance

• • Ensure availability and recoverability after failures

• Allow for data retrieval without failures

• Ensure data privacy at each site

Why is transparent access important for users

• Reduces security needs

• • Allows knowledge of data storage locations

• Simplifies interaction with complex queries

• Enables direct management of fragments