Quiz Discussion

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

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

An attribute A of datatype varchar(20) has the value “Avi”. The attribute B of datatype char(20) has value ”Reed”. Here attribute A has ____ spaces and attribute B has ____ spaces.

• 1]

  3, 20

• 2]

  20, 4

• 3]

  20, 20

• 4]

  3, 4

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

Which of the following is used to provide privilege to only a particular attribute?

• 1]

  Grant update(budget,salary,Rate) on department to Raj

• 2]

  Grant update(budget) on department to Raj

• 3]

  Grant select on employee to Amit

• 4]

  Grant delete to Amit

Which of the following statement is used to remove the privilege from the user Amir?

• 1]

  Remove update on department from Amir

• 2]

  Revoke update on employee from Amir

• 3]

  Delete select on department from Raj

• 4]

  Grant update on employee from Amir

Which of the following is true regarding views?

• 1]

  The user who creates a view cannot be given update authorization on a view without having update authorization on the relations used to define the view

• 2]

  The user who creates a view cannot be given update authorization on a view without having update authorization on the relations used to define the view

• 3]

  If a user creates a view on which no authorization can be granted, the system will allow the view creation request

• 4]

  A user who creates a view receives all privileges on that view

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

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

What type of statement is this?

• 1]

  Query

• 2]

  DML

• 3]

  Relational

• 4]

  DDL

Updates that violate __________ are disallowed.

• 1]

  Integrity constraints

• 2]

  Transaction control

• 3]

  Authorization

• 4]

  DDL constraints