Introduction to Databases: Lesson 1 Quiz

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What are the limitations of file-based data processing?

Data redundancy, data inconsistency, incompatible file format, difficulty in accessing data, separation and isolation of data, data integrity problems, problems with concurrent access by multiple users

What is the purpose of a database management system (DBMS)?

A software package designed to create databases and manipulate data. It contains a collection of interrelated data and a set of programs to access the data.

What are the advantages of the database processing approach?

Improved data sharing, increased productivity of application development, enforcement of application development, improved data quality, improved data accessibility and responsiveness, reduced program maintenance

What are the elements of a database?

Entities and attributes Signup and view all the answers

What do database relationships define?

Database relationships define the links between records in different tables, such as one-to-one, one-to-many, and many-to-many relationships. Signup and view all the answers

What is a database?

A very large collection of logically related data that is organized to manipulate easily. Models real-world activities. Signup and view all the answers

Why do we need a database?

We need a database to organize and manipulate large collections of data, and to model real-world activities and relationships. Signup and view all the answers

What is a Database Management System (DBMS)?

A software system that enables users to define, create, maintain, and control access to the database. Signup and view all the answers

What are the elements of a database?

The elements of a database include entities (e.g. students, courses) and relationships (e.g. Madara is studying PLY B6). Signup and view all the answers

What are defined as PK, FK, and Composite PK in a database?

PK stands for Primary Key, FK stands for Foreign Key, and Composite PK is a combination of multiple attributes that uniquely identify a record in a database table. Signup and view all the answers

Match the following physical examples with their corresponding databases:

Telephone Directory Book = Reservation System Cupboard in a library = Library Management System Supermarket = Order Processing System Encyclopedia = University Management System Signup and view all the answers

Match the following database elements with their definitions:

Entities (eg: students, courses) = Models real-world activities Relationships (eg: Madara is studying PLY B6) = Links between entities PK, FK and Composite PK = Key attributes in a database Referential Integrity = Ensures data consistency Signup and view all the answers

Match the following terms with their descriptions:

DBMS = Manages databases and provides access to data Database Relationships = Define how data is connected or related to each other Physical Examples = Real-world instances of databases Database Applications = Systems that use databases for specific purposes Signup and view all the answers

Match the following with their appropriate description:

File Based Data Processing Systems = A collection of application programs that manage organization’s operational data on separate computer files Database Processing Systems = All applications interact with the same data in a centralized database Signup and view all the answers

Match the following limitations with their corresponding data processing approach:

Data redundancy (duplication) = File Based Data Processing Systems Incompatible file format = File Based Data Processing Systems Signup and view all the answers

Match the following advantages with their appropriate database processing approach:

Improved data sharing = Database Processing Systems Enforcement of application development = Database Processing Systems Signup and view all the answers

Match the following elements of a database with their definition:

Entities = The things we are going to save information about Attributes = A single item of information to be saved about that entity Signup and view all the answers

Match the following terms with their corresponding explanation:

Relation = A single file/table containing data about an entity Record = A row of the relation including information about a particular entity Signup and view all the answers

Match the following types of database relationships with their description:

One-to-one (1:1) = One occurrence of an entity relates to only one occurrence in another entity One-to-many (1:M) = One occurrence of an entity relates to multiple occurrences in another entity Signup and view all the answers