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

Question # 1

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 # 2

State the Purpose of database design process.

Ans 1: The major objective of database design process is to map the conceptual data model to an implementation model that is acceptable to all users throughout the organizations . In today's is complete and up-to-date and they expect to be able to access this information quickly and easily .

Question # 3

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 # 4

Define Relationship.

Ans 1: The relationship indicates how the entities.objects are connected or related each other.
- All the relationship defines the relevant connection between both objects.
- All the relationship are bi-directional.

Question # 5

What is the importance of Project Planning?

Ans 1: In project planning a proper schedule is laid down to accomplish the activities of a project.All the cost factors are taken into consideration i.e the salaries of team members,their logistics involved,other expenses such as marriage gifts,insurance etc.

Question # 6

What is the concept of Data Distribution Strategy?

Ans 1: Data Distribution Strategy:Many organizations today have distributed computing networks . For these organizations, a significant problem in physical database design is deciding at which nodes (or sites) in the network to physically locate the data.

Basic data distribution strategies:
a) Centralized b) Partitioned
c) Replicated d) Hybrids

Question # 7

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 # 8

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 # 9

Which activities are involved in data analysis?

Ans 1: Data analysis is an important analysis aspect while designing a database.It involves the following activities:
1. Data Flow Diagram
2. Decision Table
3. Decision Trees

Question # 10

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.

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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

What is meant by Data modeling?

State the Purpose of database design process.

Define Attribute.Give an example.

Define Relationship.

What is the importance of Project Planning?

What is the concept of Data Distribution Strategy?

State the purpose of physical database design.

Differentiate between Cardinality and Modality.

Which activities are involved in data analysis?

What is entity in an ERD?

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

What is meant by Data modeling?

State the Purpose of database design process.

Define Attribute.Give an example.

Define Relationship.

What is the importance of Project Planning?

What is the concept of Data Distribution Strategy?

State the purpose of physical database design.

Differentiate between Cardinality and Modality.

Which activities are involved in data analysis?

What is entity in an ERD?

12th Computer Science Chapter 3 Preparation

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