Post No 47

1.A collection of data designed to be used by different people is called a/an
(a)Organization
(b)Database
(c)Relationship
(d)Schema
(e)None of the above.

1.Answer : (b) Explaination: A collection of data designed to be used by different people is called a data base.

2.Which of the following is the oldest database model? (a)Relational
(b)Deductive
(c)Physical
(d)Network
(e)Hierarchical.

2.Answer : (d) Explaination: Network Model is the oldest database model.

3.Which of the following schemas does define a view or views of the database for particular users?
(a)Internal schema
(b)Conceptual schema
(c)Physical schema
(d)External schema
(e)Outer schema.

3.Answer : (d) Explaination: External Schema define a view or views of the database for particular users.

4.Which of the following is an attribute that can uniquely identify a row in a table?
(a)Secondary key
(b)Candidate key
(c)Foreign key
(d)Alternate key
(e)None of the above.

4.Answer : (b) Explaination: Candidate Key following is an attribute that can uniquely identify a row in a table.

5.Which of the following is the process of selecting the data storage and data access characteristics of the database?
(a)Logical database design
(b)Physical database design
(c)Testing and performance tuning
(d)Evaluation and selecting
(e)External database design.

 

5.Answer : (b) Explaination: Physical database design is the process of selecting the data storage and data access characteristics of the database.

6.Which of the following terms does refer to the correctness and completeness of the data in a database?
(a)Data security
(b)Data constraint
(c)Data independence
(d)Data model
(e)Data integrity.

 

6.Answer : (e) Explaination: Data integrity refer to the correctness and completeness of the data in a database.

7.The relationship between DEPARTMENT and EMPLOYEE is a
(a)One-to-one relationship
(b)One-to-many relationship
 (c)Many-to-many relationship
(d)Many-to-one relationship
 (e)None of the above.

 

7.Answer : (b) Explaination:: The relationship between DEPARTMENT and EMPLOYEE is a one-to-many relationship.

8.A table can be logically connected to another table by defining a (a)Super key
(b)Candidate key
(c)Primary key
(d)Unique key
(e)Common attribute.

 

8.Answer : (c) Explaination: A table can be logically connected to another table by defining a Primary Key.

9.If the state of the database no longer reflects a real state of the world that the database is supposed to capture, then such a state is called
 (a)Consistent state
(b)Parallel state
 (c)Durable state
 (d)Atomic state
(e)Inconsistent state.

9.Answer : (e) Explaination: If the state of the database no longer reflects a real state of the world that the database is supposed to capture, then such a state is called in consistent state.

10.Ensuring isolation property is the responsibility of the (a)Recovery-management component of the DBMS (b)Concurrency-control component of the DBMS
(c)Transaction-management component of the DBMS
(d)Buffer management component in DBMS
(e)Query processor in DBMS.

10.Answer : (b) Explaination: Ensuring isolation property is the responsibility of the concurrency-control component of the DBMS