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in the first unit of this block you have been given with the details of the database management system its structure advantages etc this unit is an
record based logical models use records as the key data representation componentsexamplesrelational model it shows data as well as relationship
object-based models use objects as key data representation componentsexamples- entity-relationship model it is a collection of real world
after going by the database architecture let us now dwell on an important query how is the data organised in a database there are a lot of basic
these permit the user to unload a database or parts of a database and reload the data on the similar machine or on another machine in a dissimilar
these are designed to reduce the effects of a database failure and make sure a database is restored to a consistent state if a failure does arise
these are interactive interfaces graphical that hide the difficulty of the dbms and query language behind an intuitive simple to understand and
command line interfaces these are interactive interfaces character-based that let you use the complete power and functionality of the dbms query
there are three main sources of utilities and applications for a dbmsa vendor applications and utilities are given for working with or maintaining
at its most essential level the dbms architecture can be divide into two parts the back end and the front endthe back end is responsible for managing
an ideal data dictionary should have everything a dba wants to know about the database1 conceptual external and internal database
the database administrator dba uses the data dictionary in each phase of a database life cycle beginning from the data gathering phase to the design
the indices are accumulated in the index files the data is accumulated in the data files indices give fast access to data items for example a book
a pki and pgp are two methods for generating and managing public keys for use in protocols such as secure email compare and contrast the trust models
a university has asked you to design and implement a simple database to store student and module details including details of which school students
the purpose of the hb programming test is to assess whether a candidate has sufficient knowledge to join our team here and beyond that where they
task 1a consider the table showing the relative frequencies of letters in englisharrange the frequencies from largest to smallest and make a
write a query that uses the union operator1 use the software experts database to a display the first and the last name of all consultants who
1 a digitized voice channel is made by digitizing a 7 khz bandwidth analog signal the signal is to be sampled twice the highest frequency two samples
objectives1 login to unix system and logout2 learn features of the vi editor and to use online help main pages gain
a customer places orders for parts and belongs to a particular industry group an individual order is taken by a particular sales representative on a
cisco express forwardingcef is a new method of switching that available in ios its overcome the drawbacks of fast switching methodin ios packet
process switchingit applies the brute force method to switch packets wih consumption of large amount of cpu timelist of items are needed when
memory poolsios manages available free memory thorugh memory pool series which are essentially heaps in the generic sense each pool is a set of
flashit is also permanent storage device it stores the compressed form of cisco ios software image and the nvram datadevice structureone flash