12th Class Computer Science Chapter 3 Short Questions with Answers Online Preparation

Question # 1

Differentiate between Cardinality and Modality.

Ans 1: Cardinality : The number of record in a relation is called the cardinality of relation.
a) Whether some occurrence (s) of object -1 are related to some occurrence (s) of object -2
b) It is expressed as one or many e.g.,
c) A husband can have only one wife and
d) A Father can have many children.
Modality : Modality defines whether the participation of an entity in a relationship is mandatory or optional.
a) Optional
...................... Represented
b) Mandatory ................... Represented by 1

Question # 2

What is entity in an ERD?

Ans 1: A data is entity or object is anything that is participating in the system.It is always properly identifiable i.e a TEACHER,a STUDENT,an AEROPLANE.

Question # 3

State the purpose of physical database design.

Ans 1: Physical database design is the last stage of the database design process. The major objective of physical database design is to implement the database as a set of stored records, files, indexes, and other data structures that will provide adequate performance and ensure database integrity, security and recoverability.

Question # 4

Define E- Diagram.

Ans 1: 1) By connecting all the Data Objects along with their Relationship in the above manner, an ERD (Entity Relationship Diagram) is constructed .

2) Data modeling and the entity- Relationship Diagram provide the Analyst or Database administrator with a concise of a Data Processing Application or constructing a Physical Database.

Question # 5

Write the purpose of feasibility study.

Ans 1: The purpose of feasibility study is called preliminary investigation of the required database,It involves the area of identification and selection i.e which area or aspect is to be selected to start with.After the project is selected,it is allocated a specific fund and a proper planning is chalked out of its practical implementation.

Question # 6

Define Attribute.Give an example.

Ans 1: Attributes defines the objects,describe their characteristics and in some cases,make references to other object i.e attributes for a TEACHER could be: Teacher,Name,Gender,Last degree,Appointment Data,Pay Scale,Nationality,Telephone No.etc.

Question # 7

What is meant by Data modeling?

Ans 1: Data modeling is the process of identifying the data objects and the relationship between them.
Ingredients of Data Modeling:
1. Entities/Object
2. Attributes
3. Relationship
4. Cardinaality
5. Modality

Question # 8

Define Cardinality.

Ans 1: The number of record in a relation is called the cardinality of relation.
1. Whether some occurrence (s) of object -1 are related to some occurrence (s) of object -2
2. It is expressed as one or many e.g.
a) A husband can have only one wife and
b) A Father can have many children .
3. The relationship can be
a) One to One b) One to many
c) Many to many d) Recursive e) None

Question # 9

What is difference between Relation and Relationship.

Ans 1: Relation:A two dimensional array or table of data containing descriptive information about an entity.The entity must have a unique identifier,which is composed of a combination of one or more attributes and each attributes must have one and only one value.
Ans 2: Relationship:The relationship indicated how the entities/Objects are connected or related to each other,
- All the relationship defines the relevant connections between both objects.
- All the relationship are bi-directional.

Question # 10

Name of Any Two Types of Relationships.

Ans 1: There are two types of relationships.
1) One to One
2) One to Many

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ICS Part 2 Computer Science Chapter 3 Short Questions Test With Answer

Online Short Questions For Chapter 3 "ICS Part 2 Computer Science Chapter 3 Short Questions Preparation "

Computer Science - ICS Part 2 Computer Science Chapter 3 Short Questions Preparation

Differentiate between Cardinality and Modality.

What is entity in an ERD?

State the purpose of physical database design.

Define E- Diagram.

Write the purpose of feasibility study.

Define Attribute.Give an example.

What is meant by Data modeling?

Define Cardinality.

What is difference between Relation and Relationship.

Name of Any Two Types of Relationships.

Prepare Complete Set Wise Questions For Chapter 3 "ICS Part 2 Computer Science Chapter 3 Short Questions Preparation "

Set 1

ICS Part 2 Computer Science Chapter 3 Short Questions Preparation - Set 1

Differentiate between Cardinality and Modality.

What is entity in an ERD?

State the purpose of physical database design.

Define E- Diagram.

Write the purpose of feasibility study.

Define Attribute.Give an example.

What is meant by Data modeling?

Define Cardinality.

What is difference between Relation and Relationship.

Name of Any Two Types of Relationships.

12th Computer Science Chapter 3 Preparation

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