Test on database security P7
- Sentence 1. Basic entity-relationship model consists of object classes:
- Environment and environmental boundaries
- Entities, relationships and attributes
- Entities and properties
- Relationships
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- Question 2. Which assertion is function dependent:
- Full name - Home phone number
- ID number - Full name
- Full name - Address
- Full name - ID card number
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- Question 3. The 3NF relationship is acceptable during the search process, because:
- The dependency closure is too large
- Ensure data integrity
- Perform updates
- Do not appear to move information when performing storage operations
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- Question 4. The process of transferring 1NF relations to 3NF is the process:
- Eliminating information anomalies and not losing information
- Eliminate information anomalies
- Eliminate information anomalies and loss of information
- No loss of information
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- Question 5. The results of data manipulation operations are:
- Data series
- Data file
- Database
- relationship
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- Question 6. In SQL, the data definition language includes functions:
- Security and access rights
- Create, edit and delete relationship structures. Add columns, edit columns and delete columns
- Create, edit and delete relationships. Security and access rights
- Create, edit and delete relationship structures. Security and access rights
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- Question 7. Please select the corresponding word / phrase to complete the following assertion: A user can . and these rights can refer to the access rights of other users.
- Grant some access to the database
- Grant the right to search for data
- Grant all database access rights
- Grant the read and write permissions
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- Question 8. Select the corresponding word / phrase to complete the following assertion: Data integrity means .
- Can implement data access strategies
- Searchable at all times
- Ensure data independence at all times
- Data in the database is always accurate at all times
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- Question 9. Select the corresponding word / phrase to complete the following assertion: Equation E1 is equivalent to E2, if they represent the same mapping, ie . the same in the expression, then the result the same.
- Properties
- Relationships
- Records
- Operands
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- Question 10. Select the corresponding word / phrase to complete the following assertion: In the expression of relation the operands are .
- Function dependencies
- Properties
- Elements
- Relationships in a database
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