In which of the following SET concept is used ?
Network Model
Hierarchical Model
Relational Model
None of these
Correct Answer :
A. Network Model
Related Questions
In ………… paging we make copy of the current page table.
physical
logical
shadow
duplicate
The method of access which uses key transformation is known as
direct.
hash.
random.
sequential.
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
Repeaters operate in
i) Physical layer
ii) Datalink layer
iii) Transport layer
iv) Network layer
i and ii only
ii and iii only
ii only
i only
The attribute that can be divided into other attributes is called
Simple Attribute
Composite Attribute
Multi-valued Attribute
Derived Attribute
In an object oriented model, one object can access data of another object by passing?
Instance variable
Variable
Message
Function
In which of the following transmissions, we can send data by grouping n bits at a time instead of a single bit?
parallel
serial
analog
digital
What is the max data capacity of STP?
1 Gbps
56 Mbps
100 Mbps
256 Mbps
The database environment has all of the following components except:
users.
separate files.
database.
database administrator.
Encoding method which does not provide for synchronization
B8ZS
Manchester
RZ
NRZ-L
............... noise is caused by the random motion of the electrons in a wire and is avoidable.
Thermal
Intermodulation
Cross talk
Impulse
The exists construct returns the value true, if the argument subquery is
empty
nonempty
contains null values
none of the above
A transaction is said to have terminated if it has
either committed or aborted
either partially committed or aborted
either committed or failed
none of these
Commit operation …………… writes the changes made to the database.
temporarily
permanently
none of these
all of the above
What is ACID properties of Transactions?
Atomicity, Consistency, Isolation, Database
Atomicity, Consistency, Isolation, Durability
Atomicity, Consistency, Inconsistent, Durability
Automatically, Concurrency, Isolation, Durability
Which of the following works as a filter?
UPDATE
DROP
ALTER
SELECT
The physical path over which a message travels
Thermal
Medium
Protocol
Impulse
The maximum number of children in a B-tree of order m is
m+1
m
m-1
m/2
.................. means sending a digital signal over a channel without changing the digital signal to an analog signal.
Baseband transmission
Broadband transmission
Digital transmission
Analog transmission
In E-R diagram Generalization is represented by
Circle
Rectangle
Hyperbola
Triangle
The raw facts and figures are:
Data
Data field
DBMS
DBASE
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.
Radio frequencies below ............. are more suitable for omnidirectional applications.
300MHz
1GHz
5GHz
10 GHz
What are the different types of radio waves that are used for computer network applications?
i) Spread spectrum
ii) High power, single frequency
iii) High power, multiple frequency
iv) Low power, single frequency
v) Low power, multiple frequency
i, ii and iii only
i, ii and iv only
ii, iii and iv only
i, iii and iv only
Functional dependencies are generalization of
Relation dependencies
Data dependencies
key dependencies
none of the above
Electromagnetic spectrum included in radiowaves are
i) Super High Frequency (SHF)
ii) Very High Frequency (VHF)
iii) Ultra High Frequency (UHF)
iv) High Frequencies (HF)
i, ii and iii only
i, ii and iv only
ii, iii and iv only
i, iii and 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.
In RDBMS, Data is presented as a collection of
Relation
Table
Attribute
Entity
Secondary storage
magnetic disk
magnetic tape
juke box
cache
Data integrity refers to
the uniqueness of the data in a database
the correctness and completeness of the data in a database
the un redundancies of the data in a database
Data independence of the database