Software Testing QA/QTP Online Course | What is Software Development Life Cycle

Software testing is an activity to check whether the actual results match the expected results and to ensure that the software system is defect free. It involves execution of a software component or system component to evaluate one or more properties of interest.

Software testing also helps to identify errors, gaps or missing requirements in contrary to the actual requirements. It can be either done manually or using automated tools. Some say software testing as white box and black box testing. Want to learn concepts from professionals see QA testing training by Learn IT Training.

QA Testers are professionals who need A knowledge of software Quality Assurance methodologies, processes, and tools and Knowledge of Scripting and SQL (learn to write scripting using SQL from SQL server training)

SDLC Overview

Software Development Life Cycle (SDLC) is a process used by the software industry to design, develop and test high quality softwares. The SDLC aims to produce high-quality software that meets or exceeds customer expectations, reaches completion within times and cost estimates.

• SDLC is the acronym of Software Development Life Cycle.
• It is also called as Software Development Process.
• SDLC is a framework defining tasks performed at each step in the software development process.
• ISO/IEC 12207 is an international standard for software life-cycle processes. It aims to be the standard that defines all the tasks required for developing and maintaining software.

What is SDLC?

SDLC is a process followed for a software project, within a software organization. It consists of a detailed plan describing how to develop, maintain, replace and alter or enhance specific software. The life cycle defines a methodology for improving the quality of software and the overall development process.

The following figure is a graphical representation of the various stages of a typical SDLC.

There are different programming advancement methodologies characterized and outlined which are utilized amid improvement procedure of programming, these methodologies are additionally alluded as “Programming Development Process Models” (e.g. Waterfall model, incremental model, V-model, iterative model, and so forth.). Every procedure model takes after a specific life cycle keeping in mind the end goal to guarantee accomplishment in procedure of programming improvement. Programming life cycle models depict periods of the product cycle and the request in which those stages are executed. Every stage produces deliverable needed by the following stage in the life cycle. There are taking after six stages in every Software advancement life cycle model:

• Requirement gathering and analysis
• Design
• Implementation or coding
• Testing
• Deployment
• Maintenance

Requirement gathering and analysis: Business necessities are assembled in this stage. This stage is the fundamental center of the venture directors and partners. Gatherings with directors, partners and clients are held keeping in mind the end goal to focus the prerequisites like; who is going to utilize the framework? By what method will they utilize the framework? What information ought to be data into the framework? What information ought to be yield by the framework? After necessity assembling these prerequisites is examined for fusing the necessities in the framework.

Design: Framework Design helps in determining the framework. The framework outline particulars serve as data for the following period of the model.

Implementation/Coding: On getting framework configuration records, the work is separated in modules/units and real coding is begun. Since, in this stage the code is delivered so it is the fundamental centre for the designer. This is the longest period of the product improvement life cycle.

Testing: After the code is created it is tried against the necessities to verify that the item is really settling the needs tended to and accumulated amid the prerequisites stage. Amid this stage unit testing, mix testing, framework testing, acknowledgment testing are finished.

Deployment: After effective testing the item is sent to the client for their utilization.

Maintenance: Once when the clients begins utilizing the created framework then the genuine issues comes up and should be unravelled every once in a while. This procedure is known as support.

SDLC Models

There are various software development life cycle models defined and designed which are followed during the software development process. These models are also referred as Software Development Process Models". Each process model follows a Series of steps unique to its type to ensure success in the process of software development.

Following are the most important and popular SDLC models followed in the industry &miuns;

• Waterfall model
• Iterative model
• Spiral model
• V-model
• Big bang model

Other related methodologies are Agile Model, RAD Model, Rapid Application Development and Prototyping Models.

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