SQL 面试题与答案
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问题 11. Why is it better to use an integrity constraint to validate data in a table than to use a stored procedure?
Because an integrity constraint is automatically checked while data is inserted into a table. A stored has to be specifically invoked.
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问题 12. What are the three components of a client server model ?
A Client,
A Server and
A Network/Communication software.
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问题 13. What are the advantages of client/server model?
Flexibility of the system, scalability, cost saving, centralised control and implementation of business rules, increase of developers productivity, portability, improved network and resource utilization.
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问题 14. What are the disadvantages of the client/server model ?
Heterogeneity of the system results in reduced reliability. May not be suitable for all applications. Managing and tuning networks becomes difficult.
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问题 15. What are the different topologies available for network ?
Star,
Bus,
Ring.
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