Hello Stemians!

My Name is Muhammad Zulqarnain and
This is a NTS Test Preparation 2019.

GENERAL KNOWLEDGE

Computer Science Test

1. Which of the Keys does not hold uniqueness property?
   ANS: Foreign Key

Database development process involve mapping of conceptual data model into?
ANS: Implementation Model

1. An Entity related to itself in an ERD model refers to?
   ANS: Recursive relationship

2. In ERD model, the relationship between two entities is represented by a?
   ANS: Diamond symbol

3. In hybrid distribution which kind of fragments are stored at only one site?
   ANS: Non-critical fragments

4. Customers, cars and parts are examples?
   ANS: Entities
   

5. In an E-R diagram, a rectangle represents a?
   ANS: Entity

6. A Person’s name, birthday and social security number are examples of?
   ANS: Attributes

7. A technique for physically arranging the records of a file on secondary storage devices is called?
   ANS: File Organization

8. A Factor to consider when choosing a file Organization is?
   ANS: Fast data retrieval, Security, Efficient storage

9. A Primary key that consists of more than one attribute is called a?
   ANS: Composite Key
   

10. An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a?
    ANS: Foreign Key

11. Which field listed below is the most appropriate primary key?
    ANS: A person’s Social Security Number

12. An attribute (Or attributes) that uniquely identifies each row in a relation is called?
    ANS: Primary key

13. Organizing the database in computer disk storage is done in?
    ANS: Physical design

14. In 3NF which form of dependency is removed?
    ANS: Transitive

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