not Null
Null
both Null & not Null.
any value.
A. not Null
Data rate
Bit rate
Signal to Noise Ratio
Baud rate
Select
Update
Create
Alter
n
n+1
n-1
n/2
Logging
Recovery manager
Both A and B are true
Both A and B are false
physical level.
logical level.
conceptual level
view level.
CSMA/CA
CSMA/CD
CSMA
Token ring
Network Model
Hierarchical Model
Relational Model
None of these
project
select
rename
none of the above
growing phase and shrinking phase
execution phase and blocking phase.
running phase and sleeping phase.
none of the above
magnetic tape
juke box
optical disk
All of the above
first
second
third
fourth
Tree structure
Subtree structure
Strong entity set
Table structure
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
Partially aborted
Partially committed
Aborted
Committed
i, ii only
ii and iv only
ii and iv only
i, iv only
DBMS, same site
OS ,same site
DBMS ,different site
OS ,different site
smaller number of tables
higher query processing efficiency
reduced I/O for most queries
reduced data redundancy
View
Cursor defination
Referential intergrity
Trigger
Classless addressing
Classful addressing
Classified addressing
Classical addressing
first
Second
third
fourth
serial functions
non-serial functions
row functions
column functions
in 1NF also
in 2NF also
free from transitive dependencies
All of these
1 Gbps
56 Mbps
100 Mbps
256 Mbps
Conceptual and view
Only physical
Physical and conceptual
Only conceptual
Ordered file
Unordered file
Hashed file
B-tree
B8ZS
Manchester
RZ
NRZ-L
the logical view.
the physical view.
the external view.
all of the above.
top-down approach.
bottom-up approach.
left-right approach.
none of the above
Cardinality
Degree
Tuple
Order
Redundant Arrays of Independent Disks
Redundant Arrays of Independent Drives
Redundant Arrays of Interconnected Drives
Redundant Arrays of Interconnected Disks