Database MCQ - Query languages SQL

1:  

The language used in application programs to request data from the DBMS is referred to as the

A.

DML

B.

DDL

C.

VDL

D.

SDL

 
 

Option: A

Explanation :

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sasikala said: (9:11pm on Tuesday 26th December 2017)
we are requesting records from the database

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2:  

The language which has recently become the defacto standard for interfacing application programs with relational database system is

A.

Oracle.

B.

SQL.

C.

DBase

D.

4GL.

 
 

Option: B

Explanation :

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3:  

 The DBMS language component which can be embedded in a program is

A.

The data definition language (DDL).

B.

The data manipulation language (DML).

C.

The database administrator (DBA).

D.

A query language.

 
 

Option: B

Explanation :

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4:  

Count function in SQL returns the number of

A.

Values.

B.

Distinct values

C.

Groups.

D.

Columns.

 
 

Option: A

Explanation :

Count function in SQL returns the number of values. (Count function counts all the not null values in the specific column. If we want to count only distinct values than the DISTINCT keyword is also to be used)

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5:  

It is possible to define a schema completely using

A.

VDL and DDL.

B.

DDL and DML.

C.

SDL and DDL.

D.

VDL and DML.

 
 

Option: B

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

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