Quiz Discussion

Which of the following is used to provide delete authorization to instructor?

Course Name: SQL -Structured Query Language

  • 1]
    CREATE ROLE instructor ;
    GRANT DELETE TO instructor;

     

  • 2]
    CREATE ROLE instructor;
    GRANT SELECT ON takes
    TO instructor;

     

  • 3]
    CREATE ROLE instructor;
    GRANT DELETE ON takes
    TO instructor;

     

  • 4]

    All of the mentioned

Solution
No Solution Present Yet

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# Quiz
1
Discuss

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

Solution
2
Discuss

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

Solution
3
Discuss
INSERT INTO instructor VALUES (10211, ’Smith’, ’Biology’, 66000);

What type of statement is this?

  • 1]

    Query

  • 2]

    DML

  • 3]

    Relational

  • 4]

    DDL

Solution
4
Discuss

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

Solution
5
Discuss

Updates that violate __________ are disallowed.

  • 1]

    Integrity constraints

  • 2]

    Transaction control

  • 3]

    Authorization

  • 4]

    DDL constraints

Solution
6
Discuss

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;

Solution
7
Discuss
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

Solution
8
Discuss
SELECT * FROM employee

What type of statement is this?

  • 1]

    DML

  • 2]

    DDL

  • 3]

    View

  • 4]

    Integrity constraint

Solution
9
Discuss

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

Solution
10
Discuss

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

Solution
# Quiz