Online database with answers to the test, 26 questions, Part 1

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Description

Test items for the discipline "Databases" 26 questions.
Test №1

Question 1: Filesystem - this ...
1. - a set of files that store compilation of information necessary for the operation of the business;
2 - set of programs for processing data;
3 - a set of programs designed to solve a particular problem, and each system has its own set of data;
4 - sets of files of each department of the enterprise.

Question 2. The redundancy of data means that the ...
1. - Keep extra, not used in the processing of data;
2 - The data storage structure is not optimal, whereby data taking up too much memory on the disk;
3 - data is stored in multiple copies;
4 - Keep a copy of the data.

Question 3. File systems have the following disadvantages:
1 - data redundancy (25%);
2 - The dependence of these programs (25%);
3 - The incompatibility of files (25%);
4. - not user friendly applications;
5 - The rapid growth of applications (25%);
6. - time-consuming data processing.

Question 4. Dependence of programs from the data is that ...
1. - to enter, update and delete data had to create a separate application;
2 - if the volume of actual data increased the number of applications;
3 - The program contained a description of the data, therefore, when changing data structures had to change the program;
4. - when the program is changed to modify the data.

Item 5. Data redundancy can lead to ...
1 - The external memory is not enough for storing data;
2 - is complicated data processing;
3 - may be compromised data consistency;
4. - the data processing will spend a lot of time.


Question 6. Part of the real world of interest to this study - it's ...
1. - subject area;
2 - tuple;
3. - domain;
4. - essence.

Question 7: The database is optional features such as ...
1. - common data (25%);
2 - description of the data storage (25%);
3 - The presence of structured data;
4 - The integrated storage (25%);
5. - integrity (25%).

Question 8. In these systems, information is gathered from primary documents and stored in the form of indicators that are grouped in a certain sign
1 - file systems;
2. - documentary system;
3. - factual system;
4. - lexicographical system.

Question 9. The database record which reflects a particular document, it contains a bibliographic description, and possibly other information about him.
1. - Documentographic database;
2 - The object-oriented database;
3. - factual database;
4. - hypertext database.

Question 10. ...... database - a database in which data is presented in the form of object models, including applications that are controlled by external events.
1. - Documentographic;
2 - The object-oriented;
3. - factual;
4. - hypertext.

Question 11. The components of the data bank are ...
1. - users (25%);
2 - the hardware (25%);
3. - The software (25%);
4. - the database (25%);
5. - domain model;
6. - integrity constraints.

Question 12. Members of a data bank can be divided into the following groups:
1 - The decision-makers;
2. - junior staff;
3 - The application programmers (25%);
4 - the end-users (25%);
5. - The data manager (25%);
6. - The administrator of a data bank (25%).

Question 13. DBMS is ...
1. - a set of language and software;
2. - software;
3. - centrally stored data;
4. - a set of software and data under their control;
5. - technical means.

Additional information

Question 15. Each database should provide ...
1 - compression;
2. - secrecy data (25%);
3. - The integrity of the data (25%);
4 - The report generation;
5. - data recovery from hardware and software failures (25%);
6. - check for viruses;
7 - concurrent access to data (25%).

Question 16. The structure of each database includes ...
1. - a programming language for creating applications;
2 - The data description language (DDL) (50%);
3. - utilities for backup and recovery of data;
4. - data manipulation language (DML) (50%).

Question 17. Language of data manipulation statements that operate on integer data sets, called ...
1 - procedural;
2 - The non-procedural;
3 - The high-level;
4 - navigation.

Q18 database, providing remote access to data for multiple users, called ...
1. - general;
2. - Integrated;
3. - Remote;
4. - network.

Question 19. The work with any storage devices provides a first
DBMS?
1 - magnetic disks;
2. - tapes;
3. - punch cards;
4. - punched tape.

Question 20. What is the data model supported by the first database?
1 - network;
2. - hierarchical;
3. - relational;
4 - Object.

Question 21. The first generation DBMSs are ...
1 - relational;
2. - hierarchical (50%);
3. - relational;
4 - Grid (50%).

Question 22. The second generation DBMSs are ...
1 - relational;
2. - hierarchical;
3. - relational;
4. - network.

Question 23. What is the function of the database provides access to a database for multiple users simultaneously
1 - compression;
2. - data privacy;
3 - The integrity of the data;
4. - data recovery from hardware and software failures;
5. - check for viruses;
6. - data synchronization.
Question 24. According to the type of supported data models distinguish database
1 - relational (20%);
2. - specialized;
3. - universal;
4. - networking (20%);
5. - hierarchical (20%);
6. - database, operating in a "client-server";
7. - object-oriented (20%);
8. - object-relational (20%).

Question 25. The nature of storage, and how to access them distinguish database
1 - relational;
2. - specialized;
3. - universal;
4 - local (50%);
5. - network;
6. - hierarchical;
7. - databases, operating in a "client-server" (50%);
8. - object-oriented;
9. - object-relational.

Question 26. By appointment distinguish database
1 - relational;
2. - specialized (50%);
3. - Universal (50%);
4 - local;
5. - network;
6. - hierarchical;
7. - object-oriented.

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