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Important MCQ of RDBMS( Relational database management system)-FCST

Important MCQ of RDBMS 


 1. A RDBMS consists a collection of ?
a. Tables b. Fields c. Records d. Keys 
ANS/- a. table

2. The term attribute refers to a ___________ of a table
a. Record b. Tuple c. Column d. Key
 ans/- c. Column

3. In relational model, the row of table is known to be ?
 a. Relation b. Entity field c. Tuple d. Attribute 
ans/- C. Tuple

4. . Address field of a person should not be part of primary key, since it is likely to ?
a. Dependent b. Too long c. Changed d. Not changed 
ans/- c. Changed

5. The relational model is concerned with ?
a. Data structure and Data integrity b. Data Manipulation c. Both a and b d. None of these 
ans/- c. Both a and b

6. Which is the false statement from the following ?
a. A veiw is a named derived table b. A name relation is variable c. A veiw is a named reation and is virtual d. None of these 
ans/- d. None of these

7. The union of primary keys of the related entity sets becomes a -------------------------- of the relation ?
a. Super Key b. Candidate key c. Foreign key d. Primary key 
ans/- a. super key

8. What is the full form of RDBMS ?
a. Right Database Management System  
b. Relational Database Management system
 c. Rapid Database Management System
d. Route Database Management System
ans/- b. Relational database management system

9. . In a relational Database a referential integrity constraint cab be specified with the help of;
a. Primary Key b. Secondry key c. Foreign key d. None of these
ans/- c. Foreign key

10. Primary key should be chosen such that its attribute values are never
a. Updated b. Changed c. Dependent d. None of these 
ans/- b. Changed

11. Query language is a language in which a user?
a. Requests b. Stores c. Response d. Represents 
ans/- a.requests

12. Minimal superkeys are called ?
a. Unique key b. Superset key c. Candidate key d. Primary key 
ans/- c. Candidate key

13. A table is a collection of relationships, there is a close correspondence between concept of :
a. Tables and instances b. Table and variables c. Tables and relations d. Tables and Entries 
ans/- c. Tables and relations

14. Contents of a relation instance may change with time as relation :
a. Domain b. Retrieved c. Updated d. Time 
ans/- c. updated

15. Query languages used in practice includes
a. Elements b. Instances c. Tuples d. Fields
 ans/- a. Elements

16. Logical design of database, is known to be
a. Database relation b. Database instance c. Database entity d. Database Schema 
ans/- d. Database Schema

17. A domain is atomic if elements of the domain are considered to be ____________ units.
a. Different b. Indivisible c. Constant d. Divisible 
Ans/- b. Indivisible

18. Which one of the following is a procedural language ?
a. Domain relational calculus b. Tuple relational calculus c. Query language d. Relational algebra 
Ans/- d. Relational algebra

19. The _______operation performs a set union of two “similarly structured” tables :
a. Intersect b. Product c. Union d. Join 
Ans/- c. Union


20. Which is the operator, takes the results of two queries and returns only rows that appear in both result sets ?
a. Union b. Projection c. Difference d. Intersect 
Ans/- d. Intersect















Location: India

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