Here are some multiple-choice questions for the database management system in Computer Science class 12.

The answers are colored red. Enjoy it😀.

1. DBMS is a collection of ………….. that enables users to create and maintain a database.
A) Keys
B) Translators
C) Program
D) Language Activity

2. In a relational schema, each tuple is divided into fields called
A) Relations
B) Domains
C) Queries
D) All of the above

3. In an ER model, ……………. is described in the database by storing its data.
A) Entity
B) Attribute
C) Relationship
D) Notation

4. DFD stands for
A) Data Flow Document
B) Data File Diagram
C) Data Flow Diagram
D) None of the above

5. A top-to-bottom relationship among the items in a database is established by a
A) Hierarchical schema
B) Network schema
C) Relational Schema
D) All of the above

6. ……………… table stores information about the database or about the system.
B) Nested
C) System
D) None of these

7. …………..defines the structure of a relationship that consists of a fixed set of attribute-domain pairs.
A) Instance
B) Schema
C) Program
D) Super Key

8. ……………… clause is an additional filter that is applied to the result.
A) Select
B) Group-by
C) Having
D) Order by

9. A logical schema
A) is the entire database
B) is a standard way of organizing information into accessible parts.
C) Describes how data is actually stored on a disk.
D) All of the above

10. ………………… is a full form of SQL.
A) Standard query language
B) Sequential query language
C) Structured query language
D) Server-side query language

11) A relational database developer refers to a record as
A. a criteria
B. a relation
C. a tuple
D. an attribute

12) ………. keyword is used to find the number of values in a column.

13) An advantage of the database management approach is
A. data is dependent on programs
B. data redundancy increases
C. data is integrated and can be accessed by multiple programs
D. none of the above

14) The collection of information stored in a database at a particular moment is called as ……
A. schema
B. instance of the database
C. data domain
D. independence

15) Data independence means
A. data is defined separately and not included in programs.
B. programs are not dependent on the physical attributes of data
C. programs are not dependent on the logical attributes of data
D. both B and C

16) A ……… is used to define the overall design of the database
A. schema
B. application program
C. data definition language
D. code

17) Key to representing the relationship between tables is called
A. primary key
B. secondary key
C. foreign key
D. none of the above

18) Grant and revoke are ……. statements.

19) DBMS helps achieve
A. Data independence
B. Centralized control of data
C. Neither A nor B
D. Both A and B

20) ………. command can be used to modify a column in a table
A. alter
B. update
C. set
D. create

21) The full form of DDL in Database Management System is
A. Dynamic Data Language
B. Detailed Data Language
C. Data Definition Language
D. Data Derivation Language

22) A ……….. is a set of columns that identifies every row in a table.
A. composite key
B. candidate key
C. foreign key
D. super key

23) A set of possible data values is called
A. attribute
B. degree
C. tuple
D. domain

24) The full form of DDL in Database Management System is
A. Dynamic Data Language
B. Detailed Data Language
C. Data Definition Language
D. Data Derivation Language

25) To change column value in a table the ……… command can be used.
A. create
B. insert
C. alter
D. update

26. Which of the following SQL command can be used to modify existing data in a database table?

27. Which is the subset of SQL commands used to manipulate Oracle Database Structures, including tables?
A) Data Definition Language
B) Data Manipulation Language
C) Data Described Language
D) Data Retrieval Language

28. What are the different events in Triggers?
A) Define, Create
B) Drop, Comment
C) Insert, Update, Delete
D) Select, Commit

29. Some of the utilities of DBMS are ………….
i) Loading          ii) Backup               iii) File organization          iv) Process organization

A) i, ii, and iv only
B) i, ii, and iii only
C) ii, iii, and iv only
D) All i, ii, iii, and iv

4. ………………. first proposed the process of normalization in DBMS.
A) Edgar. W
B) Edgar F. Codd
C) Edward Stephen
D) Edward Codd


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