Quiz Discussion

The basic datatype char (n) is a _______ length character string and varchar (n) is _______ length character.

• 1]

  Fixed, equal

• 2]

  Equal, variable

• 3]

  Fixed, variable

• 4]

  Variable, equal

CREATE TABLE employee (name VARCHAR, id INTEGER)

What type of statement is this?

• 1]

  DML

• 2]

  DDL

• 3]

  View

• 4]

  Integrity constraint

In the authorization graph, if DBA provides authorization to u1 which in turn gives to u2 which of the following is correct?

• 1]

  If DBA revokes authorization from u1 then u2 authorization is also revoked

• 2]

  If u1 revokes authorization from u2 then u2 authorization is revoked

• 3]

  If DBA & u1 revokes authorization from u1 then u2 authorization is also revoked

• 4]

  If u2 revokes authorization then u1 authorization is revoked

To remove a relation from an SQL database, we use the ______ command.

• 1]

  Delete

• 2]

  Purge

• 3]

  Remove

• 4]

  Drop table

DELETE FROM r;   /* r - relation  */

This command performs which of the following action?

• 1]

  Remove relation

• 2]

  Clear relation entries

• 3]

  Delete fields

• 4]

  Delete rows

If we wish to grant a privilege and to allow the recipient to pass the privilege on to other users, we append the __________ clause to the appropriate grant command.

• 1]

  With grant

• 2]

  Grant user

• 3]

  Grant pass privilege

• 4]

  With grant option

The database administrator who authorizes all the new users, modifies the database and takes grants privilege is

• 1]

  Operator of operating system

• 2]

  Administrator

• 3]

  Super user

• 4]

  All of the mentioned

INSERT INTO instructor VALUES (10211, ’Smith’, ’Biology’, 66000);

What type of statement is this?

• 1]

  Query

• 2]

  DML

• 3]

  Relational

• 4]

  DDL

Which of the following is used to avoid cascading of authorizations from the user?

• 1]

  Granted by the current role

• 2]

  Revoke select on the department from Amit, Satoshi restrict;

• 3]

  Revoke grant option for select on the department from Amit;

• 4]

  Revoke select on the department from Amit, Satoshi cascade;

Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database?

• 1]

  DML(Data Manipulation Langauge)

• 2]

  DDL(Data Definition Langauge)

• 3]

  Query

• 4]

  Relational Schema