Full form of CIDR
Classful Inter Domain Routing
Classless International Domain Routing
Classless Inter Domain Routing
none of these
Correct Answer :
C. Classless Inter Domain Routing
Related Questions
In which of the random-access method, stations do not sense the medium?
ALOHA
ETHERNET
CSMA/CA
CSMA/CD
In mesh topology, if the number of devices is n , then the number of ports present in each device is
n
n+1
n-1
n/2
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.
Which of the following will NOT eliminates the ambiguities of a null value?
Define the attribute as required
Define subtypes
Define each attribute as having an initial value that is recognized as blank
Define supertypes
In which of the following SET concept is used ?
Network Model
Hierarchical Model
Relational Model
None of these
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.
The ________ states that a foreign key must either match a primary key value in another relation or it must be null.
entity integrity rule
referential integrity constraint
composite attribute
action assertion
Which of the following statement returns data to the host variables one at a time?
SELECT
RETURN
FETCH
GET
Noisy channel has ……… .. types of protocols
two
three
four
none
Which of the following submit and execute query at run time?
Static SQL
Dynamic SQL
both
none of these
A ………… clause permits a view definition to be used in multiple places within a query.
where
exist
with
select
In a Hierarchical model records are organized as
Graph.
List.
Links.
Tree.
Cross Product is a:
Unary Operator
Binary Operator
Ternary Operator
none of the above
Usenet is also known as
Newsgroups
10Km to 1Km
10^3Km to 100Km
100M to 10M
Tape storage is referred to as
sequential access storage
direct access storage
random access storage
none of the above
Select the incorrect statement(s)
i) Shared locks are compatible with each other.
ii) A relation which is in 3NF may have redundancy due to composite keys.
iii) A table in a database can have multiple indexes.
i only
ii, only
ii, iii only
none of the above
Attenuation can be also expressed in decibel dB) and commonly used because.
i) Signal strengths often fall off logarithmically
ii) Cascade losses and gains can be calculated with simple additions and subtractions
i only
ii only
Both A and B
None of the above
Database locking concept is used to solve the problem of
Lost Update
Uncommitted Dependency
Inconsistent Data
All of the above
In an Entity-Relationship Diagram Ellipses represents
Attributes
Weak entity set
Relationship sets
Multi-valued attributes
Event condition action model is related to
Views
Cursors
Triggers
None of these.
Functional dependencies are generalization of
Relation dependencies
Data dependencies
key dependencies
none of the above
A subschema expresses
the logical view.
the physical view.
the external view.
all of the above.
Which of the following is the unit of signaling speed or modulation rate or the rate of symbol transmission?
Data rate
Bit rate
Signal to Noise Ratio
Baud rate
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
Which of the following works as a filter?
UPDATE
DROP
ALTER
SELECT
As a side-effect of database update ,the system automatically executes a statement called
a view
a grant permission
a trigger
all of the above
Count function in SQL returns the number of
values.
distinct values.
groups.
columns.
File organization that provides fast access to any arbitrary record
Hashed file
B-tree
Ordered file
Unordered file
Referential integrity
controls relationships between operations of an object
controls relationships between instances of a class
controls relationships between attributes in a table
controls relationships between tables in a database
Relational Algebra is
Data Definition Language.
Data Manipulation Language
Procedural query Language
None of the above