Solved MCQ of Database Management System (DBMS) Set - 1

1. DBMS is a collection of ………….. that enables user 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) Non 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 store information about database or about the system.

A) SQL

B) Nested

C) System

D) None of these


7. …………..defines the structure of a relation which 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 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.

A. TOTAL

B. COUNT

C. ADD

D. SUM


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 overall design of the database

A. schema

B. application program

C. data definition language

D. code


17) Key to represent 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.

A. DDL

B. TCL

C. DCL

D. DML


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

Answers:

1. C) Program
2. B) Domains
3. A) Entity
4. C) Data Flow Diagram
5. A) Hierarchical schema
6. C) System
7. B) Schema
8. C) Having
9. B) is a standard .. accessible parts.
10. C) Structured query language
11) C. a tuple
12) B. COUNT
13) C. data is integrated and can be accessed by multiple programs
14) B. instance of the database
15) D. both B and C
16) A. schema
17) C. foreign key
18) C. DCL
19) D. Both A and B
20) A. alter

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