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explain the two types of participation constraint total the participation of an entity set e in a relationship set r is said to be total if each
define weak and strong entity sets weak entity set entity set that do not have key attribute of their
the fancy new french restaurant la food is very popular for its authentic cuisine and high prices this restaurant does not take reservations to help
define single valued and multivalued attributes single valued attributes attributes with a single value for a particular entity are known as
what is an entity relationship model the entity relationship model is a collection of basic objects known
hypothetical reliable data transfer protocol a jumping window based go-back-n arq protocol for file transfer using udp as the transport
what is a data dictionary a data dictionary is a data structure which keeps meta data about the structure of the database ie the schema of the
develop a tcp-based client-server socket program for transferring a large message the message transmitted from the client to server is read from a
develop a socket program in unixlinux that uses i tcp as the transport protocol and ii udp as the transport protocol for transferring a short
what is storage manager a storage manager is a program module that gives the interface between the low
define the terms 1 physical schema 2 logical schema physical schema the physical schema explains the database design at the physical level
define instance and schema instance collection of data kept in the data base at a particular moment is
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4
illustrate about tinysec protocol tinysec is implemented on the link layer and addresses security requirements of the resource staffed nodes in the
q explain about security aware protocolsthe security-aware ad hoc routing sar protocol based on the security attributes integrated into the ad hoc
innovative nature of triple key management the triple key management scheme provides secure services by combining different techniques whic
q in the ibm370 memory protection is offered through the use of keys a key is a 4-bit quantity every 2k block of memory has a key the storage key
sharing segments between processes without requiring the same segment number is possible in a dynamically linked segmentation system a define a
q explain a mechanism by which one segment could belong to the address space of two different processesanswer because segment tables are a collection
q what is the effect of permitting two entries in a page table to point to the same page frame in memory describe how this effect could be used to
q regard as a logical address space of eight pages of 1024 words every mapped onto a physical memory of 32 framesa how several bits are there in the
q why page sizes always powers of 2answer recall that paging is executed by breaking up an address into a page and offset number it is most competent
q consider a system in which a program is able to be separated into two parts code and data the cpu recognizes whether it wants an instruction
q name two differences between logical and physical addressesanswer a logical address doesnt refer to an actual existing address rather it refers to
is it probable to have a deadlock involving only one single process describe your answeranswer no this pursue directly from the hold-and-wait