Computer Sciences MCQs Chapter 3 Class 12

Computer Sciences MCQs Class 12: Strengthen Your Concepts

Computer Sciences MCQs Class 12 are ideal for students preparing for NUST, UET, FAST, ECAT, NTS, and FSC board exams. These MCQs cover essential computer science topics, helping students practice effectively, improve problem-solving skills, and enhance coding ability.

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Created on February 22, 2023 By Ali Durrani

Computer Sciences Ch 3 Class 12

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1 / 20

I. Which of the following keys does not hold uniqueness property

Candidate key

foreign key

Primary key

secondary key

2 / 20

19. represents entity:

Student

Teacher

Train

All of these

3 / 20

9. The process to identify the data objects and the relationships between them is:

Data Modeling

Data table

None the these

Data Flow Diagram

4 / 20

5. In activities, the cost factors are taken into consideration:

Project planning

Feasibility study

Requirement Analysis

Data Analysis

5 / 20

7. In ERD model, the relationship between two entities is represented by a

diamond symbol

rectangular box

oval symbol

line

6 / 20

is the ingredient of data modeling:

Objects

Attributes

Relationships

All of these

7 / 20

15. In E-R diagram, an oval shape is used to represent a(n):

Entity

Attribute

Relationship

None of these

8 / 20

3. is called the preliminary investigation of the required database:

Project planning

Feasibility study

Requirement Analysis

Data Analysis

9 / 20

12. What indicates the connection between entites

Relationship

Attributes

Occurences

data

10 / 20

10. The relationship between the entities is represented graphically by using:

E-R Diagram

Data Flow Diagram

Flowcharts

Decision Tables

11 / 20

2. An entity related to itself in an ERD model refers to

recursive relationship

one-to-many relationship

many-to-many relationship

one-to-one relationship

12 / 20

8. tools in involved to the Data Analysis:

Data Flow Diagram

Decision Table

Decision Tree

All of these

13 / 20

20. is not related to an entity:

Person

Concept

Action

Object

14 / 20

I I. In hybrid distribution which kind of fragments are stored at only one site

critical fragments

non-critical fragments

critical and non-critical fragment

only large fragments

15 / 20

In E-R diagram, a rectangular box is used to represent a(n):

Entity

Attribute

Relationship

None of these

16 / 20

18. An index may be created on

Primary Key

Foreign Key

All of above

17 / 20

17. A technique for physically arranging the records of a file on secondary storage device is called

Indexes

Integrity Constraints

File Organization

None of above

18 / 20

4. In activities, the possible inputs for the database are collected:

Project planning

Feasibility study

Requirement Analysis

Data Analysis

19 / 20

16. In E-R diagram, a diamond shape is used to represent a(n):

Entity

Attribute

Relationship

None of these

20 / 20

6. Database development process involve mapping of conceptual data model into

object oriented data model

network data model

implementation model (

Hierarchical data model

Your score is

The average score is 67%

Benefits of Practicing Computer Sciences MCQs

Practicing these MCQs helps students identify weak areas, boost analytical thinking, and improve exam performance. Regular practice also enhances conceptual clarity, builds confidence, and develops effective test-taking strategies, crucial for both board exams and competitive entry tests.

PLS Academy: Expert Guidance for MCQs

PLS Academy provides structured Computer Sciences MCQs with detailed solutions, topic-wise explanations, and performance tracking. Their guidance helps students master computer science concepts, refine problem-solving strategies, and maximize scores in NUST, UET, FAST, ECAT, NTS, and FSC board exams.

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