Usenet is also known as
Newsgroups
10Km to 1Km
10^3Km to 100Km
100M to 10M
Correct Answer :
A. Newsgroups
Related Questions
Three SQL, DDL, CREATE commands are
Schema, Base and Table
Schema, Table and View
Base, Table and Schema
Key, Base and Table
Which of the following produces the relation that has attributes of R1 and R2
Cartesian product
Difference
Intersection
Product
The database environment has all of the following components except:
users.
separate files.
database.
database administrator.
The degree of the table with 500 rows and 7 columns is
500
7
3500
none of these
Symbol to represent weak entity set in ER Model
Dotted rectangle
Square
Doubly outlined rectangle
Diamond
Log into a computer across an internet
IMAP
TELNET
POP3
Infrared
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
For large networks, _______ topology is used
Ring
Bus
Mesh
none of these
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
In an E-R diagram attributes are represented by
rectangle.
square.
ellipse.
triangle.
An operation that will increase the length of a list is
insert
modify
lookup
none of the above
Noisy channel has ……… .. types of protocols
two
three
four
none
A type of query that is placed within a WHERE or HAVING clause of another query is called
Super query
Sub query
Master query
Multi-query
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
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
DBMS helps achieve
Data independence
Centralized control of data
Neither A) nor B)
both A) and B)
Which of the following is not an Aggregate function?
Min
Max
Select
Avg
.................. occurs due to velocity of propagation the frequency varies. Thus various frequency components of a signal arrive at the receiver at different times.
Noise
Delay distortion
Attenuation distortion
Dispersion
RAID
Redundant Arrays of Independent Disks
Redundant Arrays of Independent Drives
Redundant Arrays of Interconnected Drives
Redundant Arrays of Interconnected Disks
A transaction which completes successfully is called
Granted
Committed
Compensated
Accomplished
Authorization command in SQL
Allow
Access
Grant
none of the above
Which one of the following is provided by a data dictionary ?
User data
Database structure data
Sorted data
Functional data
Full form of CIDR
Classful Inter Domain Routing
Classless International Domain Routing
Classless Inter Domain Routing
none of these
The maximum number of children in a B-tree of order m is
m+1
m
m-1
m/2
Triggers are also called
active rules
passive rules
inferences
none of the above
The minimal set of super key is called
Primary key
Secondary key
Candidate key
Foreign key
Database locking concept is used to solve the problem of
Lost Update
Uncommitted Dependency
Inconsistent Data
All of the above
Datalog is
procedural query language
nonprocedural query language
scan(), write()
none of the above
.................. 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 which of the random-access method, stations do not sense the medium?
ALOHA
ETHERNET
CSMA/CA
CSMA/CD