Quiz Discussion

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 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;

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

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

SELECT * FROM employee

What type of statement is this?

• 1]

  DML

• 2]

  DDL

• 3]

  View

• 4]

  Integrity constraint

Which one of the following is used to define the structure of the relation, deleting relations and relating schemas?

• 1]

  DML(Data Manipulation Langauge)

• 2]

  DDL(Data Definition Langauge)

• 3]

  Query

• 4]

  Relational Schema

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

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 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