Software testing
Software testing is a process used to identify the correctness, completeness and quality of developed computer software. It includes a set of activities conducted with the intent of finding errors in software so that it could be corrected before the product is released to the end users.
In simple words, Software testing is an activity to check that the software system is defect free
Why Is Testing Software Important?
The importance of software testing lies in its ability to detect issues early in the development lifecycle. Early software testing helps development teams prevent widespread system crashes and unexpected failures
Testing software helps development teams confirm that the software system performs according to specified requirements. It also prevents costly errors and improves overall software reliability
Thorough testing allows organizations to deliver a high quality product that meets user expectations. In modern software development, testing has become a critical part of the development process .
Major Historical Software Failures
CrowdStrike Global Outage (2024) A flawed software update caused widespread system crashes on Microsoft Windows platforms, leading to thousands of flight cancellations and estimated losses exceeding $500 million for companies like Delta Air Lines.
NASA Mars Climate Orbiter (1998) A $125 million spacecraft was lost because one team used imperial units while another used metric units in the ground control software.
Knight Capital Group Disaster (2012): An old, dormant software flag was accidentally reactivated during deployment. The resulting trading algorithm glitch caused a $440 million loss in just 45 minutes.

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