By default a user who has been granted some form of authorization
is allowed to pass them to others
is not allowed to pass them to others
may be or may not be allowed to pass them to others
none
Correct Answer :
B. is not allowed to pass them to others
Related Questions
In an Entity-Relationship Diagram Diamonds represents
Attributes
Multi-valued attributes
Weak entity set
Relationship sets
Data stored in cursor is called ……………
record
active data set
object
none of the above
The physical location of a record is determined by a mathematical formula that transforms
a file key into a record location is :
B-Tree File
Hashed File
Indexed File
Sequential file.
The ability to modify the conceptual schema without causing any change to the application program is known as
Physical data independence
Logical data independence
External data independence
Static data
.................. is the loss of energy as the signal propagates outward, where the amount of energy depends on the frequency.
Noise
Delay distortion
Attenuation distortion
Dispersion
A DBMS query language is designed to
support end users who use English-like commands.
support in the development of complex applications software.
specify the structure of a database.
all of the above.
Which of the following is true statement ?
SQL permits attribute names to be repeated in the same relation.
a SQL query automatically eliminates duplicates.
a SQL query will not work if there are no indexes on the relations
None of these
Tertiary storage
magnetic tape
juke box
optical disk
All of the above
Mail services are available to network users through the
Session layer
Presentation layer
Application layer
Transport layer
In E-R Diagram weak entity set are represented by
Ellipse
Dashed ellipse
Dashed Rectangle
Doubled Rectangle
Full form of CIDR
Classful Inter Domain Routing
Classless International Domain Routing
Classless Inter Domain Routing
none of these
Which of the following statement returns data to the host variables one at a time?
SELECT
RETURN
FETCH
GET
EEPROM
Electrically Extractable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
Electronically Erasable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
The class based addressing is known as
Classless addressing
Classful addressing
Classified addressing
Classical addressing
Technique(s) used for data recovery after any failure
Logging
Recovery manager
Both A and B are true
Both A and B are false
Transaction access data using two operations
read(), print()
read(), write()
scan(), write()
none of the above
A table that displays data redundancies yields ____________ anomalies
Insertion
Deletion
Update
All of the above
A functional dependency between two or more non-key attributes is called
Transitive dependency
Partial transitive dependency
Functional dependency
Partial functional dependency
The transaction consists of all statements executed between
the begin transaction and end transaction
the start transaction and end transaction
the begin transaction and finish transaction
none of the above.
The database environment has all of the following components except:
users.
separate files.
database.
database administrator.
Aggregate functions are also called
serial functions
non-serial functions
row functions
column functions
In a Hierarchical model records are organized as
Graph.
List.
Links.
Tree.
The minimal set of super key is called
Primary key
Secondary key
Candidate key
Foreign key
Which of the following extracts its data from the result of an SQL SELECT statement.
View
Synonym
Sequence
Transaction
Which topology requires a central controller or hub?
Ring
Tree
Switch
Graph
The types of noiseless channels are
i) Selective Reject ARQ
ii) simplest protocol
iii) Go-Back-N ARQ
iv) Stop-and-Wait Protocol
i, ii only
ii and iv only
ii and iv only
i, iv only
An entity set that does not have sufficient attributes to form a primary key is a
strong entity set.
weak entity set.
simple entity set.
primary entity set.
Usenet is also known as
Newsgroups
10Km to 1Km
10^3Km to 100Km
100M to 10M
Data independence means
data is defined separately and not included in programs.
programs are not dependent on the physical attributes of data.
programs are not dependent on the logical attributes of data.
both B) and C).
Select the incorrect statement
View is derived from other tables.
Once a transaction has executed commit work its effect cant be undone by rollback work .
The input to the aggregate function avg can be non numeric data types
A primary key can never be null.