In this data model each record can hae more than one parent
Hierarchical model
E-R model
Network based model
none of these
Correct Answer :
C. Network based model
Related Questions
In an object oriented model, one object can access data of another object by passing?
Instance variable
Variable
Message
Function
In this data model each record can hae more than one parent
Hierarchical model
E-R model
Network based model
none of these
Relational Algebra is
Data Definition Language.
Data Manipulation Language
Procedural query Language
None of the above
Range variables are designed using the
TO clause
FROM clause
RANGE clause
none of the above
Natural mask for a Class A network
255.0.0.0
255.255.0.0
255.255.255.0
none of these
B-Tree is used for
searching data
storing data
both A and B
none of these
What is the max data capacity of STP?
1 Gbps
56 Mbps
100 Mbps
256 Mbps
Which of the following file organization provides very fast access to any arbitrary record of a file?
Ordered file
Unordered file
Hashed file
B-tree
Select the incorrect statement
BCNF is stronger than 3NF
Relational algebra is a non-procedural language
Every conflict serializable schedule is view serializable.
none of the above
UML is stands for
Universal Modeling Language
Unified Modeling Language
United Modeling Language
Uni Modeling Language
Tertiary storage
magnetic tape
juke box
optical disk
All of the above
Tape storage is referred to as
sequential access storage
direct access storage
random access storage
none of the above
Which of the following is logical topology?
Bus
Ring
Star
None of these
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
In an Entity-Relationship Diagram Ellipses represents
Attributes
Weak entity set
Relationship sets
Multi-valued attributes
When all attributes in a relation tuple are not functionally dependent only on the key attribute. Which of the following normalization is needed?
first
second
third
fourth
Functional dependencies are generalization of
Relation dependencies
Data dependencies
key dependencies
none of the above
The control of concurrent execution is left with the
operating system
controller unit of the kernel
concurrency control component of the database system
none
Aggregate functions are also called
serial functions
non-serial functions
row functions
column functions
Noisy channel has ……… .. types of protocols
two
three
four
none
In defining the notion of the tuple variable, which one of the clause is useful?
as
by
from
none of the above
Encoding method which does not provide for synchronization
B8ZS
Manchester
RZ
NRZ-L
The index table has …… Columns.
1
2
3
4
Every Boyce-Codd normal form is in
3NF
2NF
1NF
none of the above
In ………… paging we make copy of the current page table.
physical
logical
shadow
duplicate
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.
The access protocol used by traditional Ethernet
CSMA/CA
CSMA/CD
CSMA
Token ring
In which of the following SET concept is used ?
Network Model
Hierarchical Model
Relational Model
None of these
…………… is responsible for using that the database remains in a consistent state despite system failure.
Storage manager
Admin
Transaction manager
none of the above
EEPROM
Electrically Extractable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
Electronically Erasable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory