DBMS IS212 Chapter 1 Quiz

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Questions and Answers

What is a significant disadvantage of file processing systems?

Excessive program maintenance costs consuming 80% of the budget (correct)

Rapid development times due to standard formats

Limited data sharing due to centralized control

Inconsistent data management across multiple applications (correct)

What characterizes the Database Approach compared to file processing?

Data management is fragmented across different applications

Data is stored in a non-standard format

Each program has centralized control of its data

There is a central repository for data sharing (correct)

Which of the following is a key advantage of using a Database Management System (DBMS)?

Eliminates the need for data sharing between applications

Provides better data integrity through controlled redundancy (correct)

Requires frequent manual updates to maintain data integrity

Data is typically maintained in multiple different formats

What is a consequence of using various programming languages in file processing?

Inability to access each other's files easily Signup and view all the answers

How does a DBMS fundamentally support database systems?

It facilitates the creation and maintenance of computerized databases Signup and view all the answers

What percentage of the total assessment is allocated to the Final Term Examination?

60 % Signup and view all the answers

Which of the following is NOT considered an example of a database application?

Purchasing a new house Signup and view all the answers

Which definition best describes a database?

A shared collection of logically related data designed for different users Signup and view all the answers

What type of data includes images and videos?

Unstructured Signup and view all the answers

Which component of a database helps to provide program–data independence?

System catalog (metadata) Signup and view all the answers

In database terminology, what are entities?

Objects or things in the real world that are represented in data Signup and view all the answers

What is the primary function of metadata in a database?

Describing the properties and context of user data Signup and view all the answers

Which aspect of data can be defined as data that has been processed to increase knowledge?

Information Signup and view all the answers

Which of the following is NOT a functionality typically provided by a Database Management System (DBMS)?

Creating physical hardware for database storage Signup and view all the answers

What type of operations does a DBMS perform for database modification?

Inserting, deleting, and updating records Signup and view all the answers

Which of the following statements about database relationships is correct?

INSTRUCTORs can teach multiple SECTIONs. Signup and view all the answers

Which feature of a DBMS is essential for preventing unauthorized access to the database?

Protection or security measures Signup and view all the answers

In a university database, which relationship is NOT accurately depicted?

COURSEs have no prerequisite COURSEs Signup and view all the answers

What is a disadvantage of file processing systems related to data management?

Data Redundancy Signup and view all the answers

How does context influence the understanding of data?

It helps users understand data properties and characteristics. Signup and view all the answers

What is a characteristic of file processing systems regarding data management?

Each program defines and manages its own data Signup and view all the answers

What is indicated by program-data dependence in file processing systems?

File structure is defined in the program code Signup and view all the answers

What occurs when different programs maintain separate copies of the same data?

Data Redundancy Signup and view all the answers

Which of the following is a characteristic of shared organizational databases?

They allow different departments to access the same data. Signup and view all the answers

In file processing systems, the metadata for each file is maintained by:

Each individual program Signup and view all the answers

What is a potential risk associated with the duplication of data in file processing systems?

Risk of inconsistent data values and formats Signup and view all the answers

Study Notes

Course Information

Course Title: Database Management Systems (DBMS)
Course Code: IS212
Department: Information Systems Department
Faculty: Faculty of Computers and Information
University: Minia University

Assessment Weightage

Mid Term Examination: 10%
Final Term Examination: 60%
Oral Examination: 10%
Practical Examination: 10%
Semester Work: 10%
Total: 100%

Course Outline

Introduction to Database
Relational Data Model and Relational Database Constraints
Data Modeling Using the Entity Relationship (ER) Model
Basic SQL
Database Design Theory and Normalization

Chapter 1: Introduction to Database

Examples of Database Applications

Purchases from the supermarket
Purchases using a credit card
Booking a holiday at travel agents
Using the local library
Taking out insurance
Renting a video
Using the internet
Studying at university

Definitions of Database

Database: An organized collection of logically related data
Database is a shared collection of logically related data
Database: A self-describing collection of integrated records
Database models a particular real-world system in the computer in the form of data

Definitions

Data: Facts concerning objects and events
Structured data: numbers, text, dates
Unstructured data: images, video, documents
Information: data processed to increase knowledge
Metadata: data describing properties and context of user data

What is a Database?

Shared collection of logically related data
System catalog (metadata) enables program-data independence
Logically related data comprises entities, attributes, and relationships

Figure 1-1a Data in Context

This shows example data in a class roster
Includes course, student ID, major, GPA, etc.
Context helps understand data

Table 1-1 Example Metadata for Class Roster

Shows data types, field sizes and description, source

The concept of a shared organizational database

Diagram illustrating connections between different organizational departments to database
Highlights how different departments use the database

File Processing System

A collection of application programs serving end-users
Each program defines and manages own data
Diagram showcasing separate files for library, examination and registration

Tables (Library, Examination, Registration)

Each table depicts data structures for each system

Files Based Processing

Diagram of file-processing system with sections for data entry, file handling routines, and file definition

Disadvantages of File Processing

Program-Data Dependence: File structure is defined in the program code
Duplication of Data (Data Redundancy): Different systems have separate copies of same data
Limited Data Sharing: Programs can't easily access others' files
Lengthy Development Times: Programmers design own file formats
Excessive Program Maintenance: 80% of IS budget
Vulnerable to Inconsistency: Change in one table needs changes in corresponding tables

SOLUTION: The DATABASE Approach

Central repository of shared data
Data managed by a controlling agent
Stored in a standardized, convenient form
Requires a Database and Database Management System (DBMS)

Advantages of Database Approach

Data Sharing
Controlled Redundancy
Data Independence

Database Management System (DBMS)

Software package to create and maintain databases
DBMS software + data = Database System
Applications are sometimes included

Simplified database system environment

Diagram illustrating the components of a simplified database system

Typical DBMS Functionality

Defining the database
Constructing the database
Database manipulation (insertions, deletions, updates, querying, etc.)

Typical DBMS Functionality (Other features)

Security measures to prevent unauthorized access
Active processing to perform internal tasks
Data presentation and visualization
Database and application maintenance over lifetime

Example of a Database (with a Conceptual Data Model)

Mini-world: Part of a UNIVERSITY environment
Entities: STUDENTS, COURSES, SECTIONS, DEPARTMENTS, INSTRUCTORS

Example of a Database (with a Conceptual Data Model) Relationships

Relationships: SECTIONS part of COURSE, STUDENTS take SECTIONs, COURSEs have prerequisite COURSES, instructors teach SECTIONs, COURSEs offered by DEPARTMENTS, STUDENTS major in DEPARTMENTS

Example of a Simple Database

Example tables (COURSE, SECTION, GRADE_REPORT, PREREQUISITE) showcasing database structures

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Description

This quiz covers the introduction to databases, focusing on the key concepts and definitions essential for understanding database management systems. Test your knowledge on database applications and the relational data model as outlined in Chapter 1. Perfect for students of IS212 at Minia University.