Answers to tickets for Databases 37 questions

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1. What is meant by the term "database", "database system"?
2. What is a database management system and its application?
3. What are the different levels of data models?
4. What are the main structural elements infological model "entity-relationship" and the types of relationships?
5. What are the model database and what is the difference between them?
6. How to organize data relational, hierarchical, network models and models of inverted lists?
7. What are the advantages and disadvantages of relational, hierarchical and network data models?
8. What are, and what meaning has the concept of "domain", "attribute", "cortege"?
9. What are the principles of a relational database?
10. What are the demands of integrity in the relational model?
11. What are the data manipulation operations in the relational model?
12. What is the normal form of relational models?
13. What is the process of normalization in the relational model?
14. What is the meaning of decomposition without loss of data normalization procedure?
15. What is the meaning of the concept have a "primary key", "foreign key" with the normalization of the data?
16. What is a distributed database, and what are their characteristics?
17. What are the advantages and disadvantages of distributed databases?
18. What are the principles of independence from the central site, the location, from the fragmentation of replication in distributed databases?
19. How does the query processing in distributed database systems?
20. How to solve problems in the management of the catalog distributed database systems?
21. How is the reliability of distributed database systems?
22. How is the management of concurrent access to distributed database systems?
23. What languages \u200b\u200bare used for working with relational databases in the database?
24. What are the prerequisites for the object-oriented database?
25. What are the advantages and disadvantages of object-oriented approach to the creation of databases?
26. What do the terms "encapsulation", "polymorphism", "inheritance" in object-oriented databases?
27. What is an object-relational database?
28. What are the hypertext system?
29. What are the features of hypertext database?
30. What the components of the operating system?
31. What are the add-on operating system? What are their main features?
32. Specify the purpose and function of the main groups of software packages.
33. What is tabular processors? What are their functions and features?
34. On what grounds are classified modern operating systems for the PC?
35. What are the characteristics of construction and what functionality word processors?
36. Perform classification networks.
37. What is e-mail?


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