Software Quality Assurance in software engineering

Image
Software Quality Assurance (SQA):-  SQA is a set of activity assuring quality in software engineering process. Altimetry result in quality in software products. It include a following activities:- Process definition & implementation Auditing  Training  SQA is a process that insure hat developed software needs & compiles with defined or standardized quality specification. SQA is an on going process with in the SDLC that routinely checks the developed software to insure its needs desired quality measured. SQA helps to insure the development of high quality software. SQA practices are implementation in most type of software development regardless of underline software development model are being used. In a border sense SQA incorporate an implement software testing methodology to test software. SQA process test for quality in each phase of development until the software is completed. SQA genially works on one or more industries standards that helps in building software quality guid
Post a Comment

Structure of Database Management System (DBMS)

 

 Structure of Data Base Management System:-

         The measure components of DBMS described below:-

  • Data Manager:- 
It is the central software component of the DBMS. It is some times called database control system. Main function of the data manager is to convert operation in the user queries directly via the query processor or indirectly by an application program from the user logical view to a physical file system the data manager is also responsible for interfacing with the file system. The tasks of informing constraints to maintain the consistently and integrity of the data as well as its securely are also performed by data manager backup & recovery operations are  also performed by data manager.
  • File Manager:-
It is responsible for the structure of file & managing the file space it is also responsible for location the block containing the required record.

  • Disk Manager:-
The manager is a part of operating system of the host computer & all physical input & output operation of performed by it the disk manager transfer the block or page required by the file manager.

  • Query Processor:-
  The query processor is used to interpret the online users query & convert it into an efficient users of operation in a form. Capable of being sent to the data manager for execution the query processor uses the data dictionary to find the the structure of the revolution of the database & uses this information in modified the query & preparing & optimal plan to access to database.         



 DDL Compiler:-

The DDL compiler convert the data definition statement into a set of tables. These table contains the meta data conserving the data base are in a from that can be used by component of the DBMS.  


      

Comments

Post a Comment

Popular posts from this blog

Types of attributes in DBMS, derived, single valued, simple, multivalued, stored, composite

Image
 Types of Attributes:- Simple Attribute:-  The attributes that cannot be further divided in to smaller part an represents the basic meaning is called a simple attributes. Eg:- Age attributes of person entity represent a simple attribute. Composite Attribute:-  Attribute that can be further divided into smaller unit & each individual unit contains a specific meaning. Eg:- Name attribute of an employ can be sub divided. Multivalued Attribute:-  Attribute that have more than one values for a particular entity is called a multivalued attributes. Eg:- Phone no. for a person entity is a multivalued entity. Stored Attributes:-  Attribute that are directly stored attribute. Eg:- Date of joining attributes of employ entity.  Single valued attribute:-  Attribute having a single value for a particular entity. Eg:- Age is an single valued attribute of a student entity. Derived Attribute:-  Attributes are not stored directly but  can be derived from stored attributes are called derived attribut
Read more

what is Data Flow Diagram (DFD), Features of DFD, Zero '0' level DFD, First '1' level DFD and Boehm's definition of organic, semi-detached and embedded system in software engineering

Image
Data Flow Diagram (DFD):-  It is a graphical representation of the flow of data through an information system modeling, modeling its process expect. A DFD is of an use as a skip to create an overview of the system. Without going into great details, which can later elaborate. DFD is also use for the visualization data processing (structured design). Features of DFD:-  A DFD shows what kind of information will be input and output from the system and how the data will advance through the system and where the data will be stored it dose not shows information about process timing or whether process will operate in sequence or in parallel unlike a traditional structured flow chart will focuses on control flow activity which presents both controls and data flow as a unified model. Zero '0' level DFD:-  A context diagram is a top level also known as zero level DFD. It only content one process note(process '0') that generalized the function of entire system in a relationship to
Read more