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Database MCQ - Query languages SQL

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6:  

The statement in SQL which allows to change the definition of a table is

A.

Alter.
B.

Update.
C.

Create.
D.

Select.
 
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Option: A

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7:  

 Which of the following is correct:

A.

a SQL query automatically eliminates duplicates.
B.

SQL permits attribute names to be repeated in the same relation.
C.

a SQL query will not work if there are no indexes on the relations
D.

None of these
 
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Option: D

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8:  

Which of the following is a valid SQL type?

A.

CHARACTER
B.

NUMERIC
C.

FLOAT
D.

All of the above
 
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Option: D

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9:  

Which of the following operations need the participating relations to be union compatible?

A.

UNION
B.

INTERSECTION
C.

DIFFERENCE
D.

All of the these
 
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Option: D

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10:  

The full form of DDL is

A.

Dynamic Data Language
B.

Detailed Data Language
C.

Data Definition Language
D.

Data Derivation Language
 
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Option: C

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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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  • UGC NET
  • Pre PhD Entrance Exam
  • DOEACC Exams
  • Kendriya Vidyalaya Sangathan Entrance Exam

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