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databases Online Quiz - 128

Description: databases Online Quiz - 128
Number of Questions: 20
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Tags: databases
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There are 2 schemas – S1 and S2 in a database. S1 has a table T1 in it. S2 don’t have any privileges on objects of S1. A synonym SYN_T1 is created in the schema S2 for S1.T1 and select privilege is granted to S2 on the synonym. Now, the newly created synonym is dropped. What will be the output of the following query executed from S2: Select * from S1.T1

  1. Error - Table or view does not exist

  2. Error - Synonym translation is invalid

  3. Output – all the rows of S1.T1

  4. Output – no rows retrieved


Correct Option: C

What are the data base objects for which you can create synonyms?

  1. Table

  2. View

  3. Procedure

  4. Package

  5. Another Synonym

  6. Sequence


Correct Option: A,B,C,D,E,F

Which table is used to identify the changes made to objects

  1. V$Session

  2. USER_CHANGES

  3. USER_OBJECTS

  4. USER_TRACKER


Correct Option: C
  1. Public synonym will be created

  2. Only a private synonym will be created

  3. Error

  4. Public synonym will be created, but accessible only from S2


Correct Option: C
  1. Cant protect the code

  2. Third party utilities

  3. Binary wrapper utility

  4. Only DBA's are allowed to protect


Correct Option: C

Limitation for level of label Nesting in a PL/SQL program

  1. No limitations

  2. 89

  3. 76

  4. 98


Correct Option: D

Limitation for level of nesting in a PL/SQL program

  1. 10

  2. 32

  3. 23

  4. No limitations


Correct Option: B

Which command is used to write information to an output buffer?

  1. SET OUTPUT ON

  2. SET BUFFEROUTPUT ON

  3. SET SERVEROUTPUT ON

  4. SET SCREEN ON


Correct Option: C

Command used to import the data from flat files?

  1. imp

  2. sqlloader

  3. sqlldr

  4. exp


Correct Option: C

Whether SQL has unloader facility to unload the data?

  1. True

  2. False


Correct Option: B

Can SQL loader handle EBCDIC data?

  1. True

  2. False


Correct Option: A

SQL loader can load images, sound clips and documents

  1. True

  2. False


Correct Option: A

Which are the commands used to improve the performance of loader

  1. direct=true

  2. command

  3. indexes

  4. constraints

  5. running multiple load jobs

  6. fast=true


Correct Option: A,C,D,E

Which are all true in loading multi-line records?

  1. Specifying carriage return statement in control file

  2. Position based loading

  3. Sperators as comments in the source file

  4. Carriage return


Correct Option: A,B,D
  1. Selection

  2. Projection

  3. Joining

  4. None of these


Correct Option: A,B,C

To join n tables together, you need a minimum of ________ join conditions

  1. N-2

  2. N

  3. N-1

  4. None of these


Correct Option: C
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