Here are the collections of solved MCQ on Database Management System (DBMS) includes questions of definition of DBMS, Data Flow Diagram (DFD) along with about SQL functions and commands.
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 the overall design of the database
A. schema
B. application program
C. data definition language
D. code
17) Key to represent 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.
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