Classical

Database MCQ - ER-model & Relational Model

1:  

In tuple relational calculus P1 → P2 is equivalent to

A.

¬ P1  ∨ P2

B.

P1 ∨ P2

C.

P1  ∧ P2

D.

P1  ∧ ¬P2

 
 

Option: A

Explanation :


2:  

 A logical schema

A.

Is the entire database.

B.

describe data in terms of relational tables and columns, object-oriented classes, and XML tags.

C.

Describes how data is actually stored on disk.

D.

Both (A) and (C)

 
 

Option: A

Explanation :


3:  

Related fields in a database are grouped to form a

A. Data file
B. Data record.
C. Menu.
D. Bank.
 
 

Option: B

Explanation :
Related data fields in a database are grouped to form a data record.
(A record is a collection of related fields)


4:  

The database environment has all of the following components except:

A.

Users.

B.

Separate files

C.

Database.

D.

Database administrator

 
 

Option: B

Explanation :


5:  

The way a particular application views the data from the database that the application uses is a

A.

Module.

B.

Relational model.

C.

Schema.

D.

Sub schema.

 
 

Option: D

Explanation :




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Syllabus covered in this section is-

  • E- R diagrams and their transformation, to relational design
  •  Normalization - l NF, 2NF, 3NF
  •  BCNF and 4NF.Limitations of 4NF and BCNF
  • SQL :Data Definition Language (DDL) , Data Manipulation Language (DML), Data Control Language· (DCL)-
  • Database objects like Views, indexes, sequences, synonyms, Data dictionary
  • Database Concepts
  • Data Models,
  • Design of Relational Database
  • Query Processing and Optimization
  • Centralized and Distributed Database
  •  Security.
  •  Concurrency and Recovery in Centralized and Distributed Database Systems,
  • Object Oriented Database Management
  • Systems (Concepts, Composite objects, Integration with ROBMS applications),

 

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  • DOEACC Exams
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