Santhakumar Raja

Science is based on measurement. Improving a process requires understanding of the numerical relationships. Software Metrics this requires measurement. Software measurement is the mapping of symbols to objects. The purpose is to quantify some attribute of the objects, for example, to measure the size of software projects. Additionally, a purpose may be to predict some

Although the word ‘‘manager’’ may remind many of us of the manager in the ‘‘Dilbert’’ comic strip, management is important. Software project management is the important task of planning, directing, motivating, and coordinating a group of professionals to accomplish software development. Software project management uses many concepts from management in general, but it also has

User interface design effective interfaces for software systems, System users often judge a system by its interface rather than its functionality. A poorly designed interface can cause a user to make catastrophic errors. Poor user interface design is the reason why so many software systems are never used. Graphical User Interfaces Most users of business

Software Requirements and Requirements Engineering Process – Requirements are the descriptions of the services provided by a system and its operational constraints What is requirements engineering? The process of establishing the services that the customer requires from a system and the constraints under which it operates and is developed. It is the process of discovering,

Software Development Life Cycle (SDLC) is the application of standard business practices to building software applications. It’s typically divided into six to eight steps: Planning, Requirements, Design, Build, Document, Test, Deploy, Maintain. Six Phases of the System Development Life Cycle Preliminary Investigation Assesses feasibility and practicality of system System Analysis Study old system and identify

System calls sequence to copy the contents of one file to another file Programming interface to the services provided by the OS Typically written in a high level language (C or C++) Mostly accessed by programs via a high level Application Program Interface (API) rather than direct system call use Three most common APIs are

These are the pieces of the operating system components we’ll be looking at: Process Management Main Memory Management File Management I/O System Management Secondary Management Networking Protection System Command-Interpreter System Process Management A process is a program in execution: (A program is passive, a process active.) A process has resources (CPU time, files) and attributes

Simple Structure MS-DOS written to provide the most functionality in the least space, Operating System Structures. Not divided into modules Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated Layered Approach The operating system is divided into a number of layers (levels), each built on top of lower layers.

API, an abbreviation of application program interface, is a set of routines, protocols, and tools for building software applications. A good API makes it easier to develop a program by providing all the building blocks. A programmer then puts the blocks together. Most operating environments, such as MS-Windows, provide an API so that programmers can

Overloading binary operators can be overloaded just as easily as unary operators. We’ll look at examples that overload arithmetic operators, comparison operators, and arithmetic assignment operators. Arithmetic Operators In the ENGLCON program in before we showed how two English Distance objects could be added using a member function add_dist(): dist3.add_dist(dist1, dist2); By overloading binary operators