Question 1. Which of three schemas used in three-schema model is a complete logical View of database?
Question 2. Which of three schemas used in three-schema model shows physical storage using a particular product or technique?
Question 3. The type of data independence in which the internal schema can be modified without modifying the conceptual schema is classified as
(A) logical data independence
(B) external level independence
(C) physical data independence
(D) conceptual level independence
Question 4. Database __________ which is the logical design of the database, and the database _______ which is a snapshot of the data in the database at a given instant in time.
(A) Instance, Schema
(B) Relation, Domain
(C) Relation, Schema
(D) Schema, Instance
Question 5. Relational schemas and other metadata about relations are stored in a structure called the _____?
(A) Data Dictionary
Question 6. Which of the following enables the user to modify data structures Without affecting existing programs that use them?
(A) Data relationships
(B) Data independence
(C) Data dependence
(D) Data Integration
Question 7. Duplicate data in multiple data files is called_____?
(A) Data Integrity
(B) Data multiplication
(C) Data redundancy
Question 8. Commit and rollback are related to ……….?
(A) Data integrity
(B) Data security
(C) Data sharing
(D) Data consistency
Question 9. ……… servers which is widely used in relational database systems.
(A) Data servers
(B) Transaction servers
(C) Query servers
(D) Client servers
Question 10. A collection of data designed to be used by different people is called a/an __________.
Question 11. Which of the following is the process of selecting the data storage and data access characteristics of the database?
(A)Logical database design
(B)Evaluation and selecting
(C)Testing and performance tuning
(D)Physical database design
Question 12. Overall logical design of the database is known as _______ ?
(A) Sub Schema
Question 13. Actual data or information means _______
(A) Sub Schema
Question 14. _____ is the lowest level of the data abstraction.
(A) Internal Level
(B) Conceptual Level
(C) External Level
(D) Data Layer
Question 15. _______ hides details about data types and data-structure used to develop application at logical level.
(A) Conceptual Level
(B) Physical Level
(C) External Level
(D) Internal Level
Question 16. In external mapping, how many mappings are there between conceptual and external levels ?
Question 17. As per the database system architecture, Sophisticated user uses _______
(A) Application interface
(B) Administrator Tool
(C) Application program
(D) Query Tool
Question 18. How many components are there in Query Processor ?
Question 19. Data Model is _______?
(A) Used to describe structure of the database and Set of basic operations on the database
(B) It allows independent customized user views
(C) Used to describe structure of the database
(D) Set of basic operations on the database
Question 20.Hierachical Model records are represented as ________?
Question 21. Which of the following is a record based logical model ?
(A) Physical Model
(B) Object-Oriented Model
(C) Network Model
(D) E-R Model
Question 22.Network Data Model records are represented as ________.
Question 23. In ____ database system, management of resources becomes very difficult.
Question 24. How many components are there in Client-Server database system?
Question 25._______ mapping provides logical independence.
(C)Both A & B
(D) None of above