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12th Standard English Medium Computer Science Subject Database Concepts Creative 2 Mark Questions with Solution

Published on: 22/06/2021

QB365 provides detailed and simple solution for every Creative Questions in class 12 Computer Science Subject. It will helps to get more idea about question pattern in every Creative questions with solution.

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Std: 12th Standard - Computer Science

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Write a note on
(i) SELECT Operation
(ii) PROJECT Operation

List the types of RDBMS software.

List the characteristics of DBMS.

Differentiate data and information.

What is database?

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Answers Key:

Generic 2

5 x 2 = 10

(i) SELECT Operation (symbol : σ): The SELECT operation is used for selecting a subset with tuples according to a given condition.
(ii) PROJECT Operation (symbol: II): The projection eliminates all attributes of the input relation but those mentioned in the projection list. The projection method defines a relation that contains a vertical subset of Relation.

SQL server, Oracle, MySQL, MariaDB, SQLite.

DBMS Supports Transactions : It allows us to better handle and manage data integrity in real world applications where multi-threading is extensively used.

(i) Data are raw facts stored in a computer. A data may contain any character, text, word or a number.
(ii) Information is formatted data, which allows to be utilized in a significant way.

(i) Database is a repository collection of related data organized in a way that data can be easily accessed, managed and updated.
(ii) Database can be a soft ware or hardware based, with one sole purpose of storing data.