Tape storage is referred to as
sequential access storage
direct access storage
random access storage
none of the above
Correct Answer :
A. sequential access storage
Related Questions
The mode in which data item may be locked
Partner
Mutual
Exclusive
Atomic
Which of the following operator preserves unmatched rows of the relations being joined?
Inner join
Outer join
union
Intersect
.................. 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
DBMS helps achieve
Data independence
Centralized control of data
Neither A) nor B)
both A) and B)
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
Log into a computer across an internet
IMAP
TELNET
POP3
Infrared
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).
The number of cursors depend on the
number of queries
number of attributes
size of memory area
none of these
In which of the random-access method, stations do not sense the medium?
ALOHA
ETHERNET
CSMA/CA
CSMA/CD
The left outer join takes all tuples
in the left relation which didnt match with any tuple in right relation
in the left relation which matched with a tuple in right relation
in the right relation which didnt match with any tuple in left relation
in the right relation which matched with a tuple in left relation
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
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
which of the following is a binary operation?
project
select
rename
none of the above
Only one communication channel is needed rather than n channels to transmit data between two communicating devices
parallel
serial
analog
digital
Which of the following is a classical approach to database design?
Left Right approach
Right Left approach
Top Down approach
Bottom Up approach
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.
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.
Which of the following submit and execute query at run time?
Static SQL
Dynamic SQL
both
none of these
File organization that provides fast access to any arbitrary record
Hashed file
B-tree
Ordered file
Unordered file
A logical description of some portion of database that is required by a user to perform task is called as
System View
User View
Logical View
Data View
Size of source and destination address in IP header
4 bits
8 bits
12 bits
32 bits
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
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
Primary storage
magnetic disk
magnetic tape
juke box
cache
An association of several structure of a data base can be expressed graphically by?
Tuple
Record
Relationship
Field
An operation that will increase the length of a list is
insert
modify
lookup
none of the above
In an Entity-Relationship Diagram Diamonds represents
Attributes
Multi-valued attributes
Weak entity set
Relationship sets
Which one of the following statements is false?
The data dictionary is normally maintained by the database administrator.
Data elements in the database can be modified by changing the data dictionary.
The data dictionary contains the name and description of each data element.
The data dictionary is a tool used exclusively by the database administrator.
Unwanted energy from source other than the transmitter.
Attenuation
Distortion
Delay
Noise
DECLARE is a(an)
executable statement.
declarative statement.
Ordered file
none of the above