10 Questions
Which disadvantage results from having no centralized execution of data management functions?
Scattered data management
What is one main advantage of the Database Management System (DBMS) over traditional approaches?
Reduced need for data redundancy
Why is concurrent access a challenge in traditional data management systems?
Inconsistent data due to redundant updates
What improvement does a DBMS provide in terms of data sharing?
Enhanced capacity for concurrent usage
Which component is part of the three-schema architecture in relational databases?
Physical schema
In a client-server architecture, what is a primary function of the server?
Providing a central database for networked clients
What is one key characteristic of a Desktop Database compared to a Server Database?
Supports only a single user at a time
Which software is an example of a Desktop Database?
Fox Pro
Why is improved data access considered an advantage of DBMS over traditional data management systems?
Because data is structured in a non-redundant manner
What is a benefit associated with a Desktop Database?
Easy and inexpensive management
Study Notes
Overview of Database Management System (DBMS)
- A DBMS is a software system that interacts with users' application programs and the database, allowing users to create their own databases as per their requirement.
- It provides an interface between the data and the software application.
Purpose of Database System
- A database system is a collection of interrelated data and a set of programs that allow users to access and modify the data.
- Data is converted into information, and information is then evaluated and organized so that it can be used purposefully as knowledge.
Application Programs
- A computer program that interacts with the database by using an appropriate request (SQL statement) to DBMS.
- User interacts with the DB through number of application programs that are used to create and maintain the DB and to generate information.
Types of DBMS
- MySQL
- Microsoft SQL Server
- Maria DB
- Oracle
- DBMS
- PostgreSQL
- Redis
- IBM DB2
- Maria DB
- SQLite
- Elasticsearch
Disadvantages of Traditional Approach
- Data Security: Data is not secure as it can be easily accessed.
- Data Redundancy: The same information may get duplicated in two or more files, leading to higher storage and access costs, and data inconsistency.
- Data Isolation: Data is scattered in various files having different formats, making it difficult to access and share data.
Importance of DB in Life
- Controlling Data: Data consistency is maintained, and data redundancy is minimized.
- Data Sharing: Unlimited data sharing is possible, allowing users from different departments to share corporate data according to their information needs.
- Integrated Data: Data is centralized, making it easy to manage and maintain.
- Data Dependence: The data description can change without having to change the code that operates on the data.
- Data Security: Data is protected against threats, both accidental and intentional.
3 Major Steps in DB Development Process
- Data Sharing
- Data Security
- Data Control
Properties of DB
- Integrity
- Flexibility
- Efficiency
- Usability
- Completeness
DBMS Architecture
- Three-Schema Architecture: breaks a database down into three different levels according to its use and structure.
- Client-Server Architecture: entire files are transferred from the server to the client for processing.
Categories of DBMS
- Desktop Database: Microsoft Access, Fox Pro, FileMaker, Paradox, Lotus
- Server Database: Oracle, Microsoft SQL Server, IBM DB2, MySQL, Firebird, PostgreSQL
This quiz covers the basics of DBMS, including its functions, features, and role in managing and controlling access to databases.
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