Regression testing is any type of software testing that seeks to uncover new errors, or regressions, in existing functionality after changes have been made to a system, such as functional enhancements, patches or configuration changes.

Functional testing is a type of black box testing that bases its test cases on the specifications of the software component under test. Functions are tested by feeding them input and examining the output, and internal program structure is rarely considered (Not like in white-box wikipedia.org

Web testing is the name given to software testing that focuses on web applications. Complete testing of a web-based system before going live can help address issues before the system is revealed to the public. wikipedia.org

Java is a programming language and a core component of Oracle Corporation's Java Platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities. wikipedia.org

Cucumber is a tool for running automated acceptance tests written in a behavior driven development (BDD) style. Cucumber is written in Ruby programming language. Cucumber allows the execution of feature documentation written in business-facing text. wikipedia.org

Selenium WebDriver is the successor to Selenium RC, a portable software testing framework for web applications. Selenium WebDriver accepts commands and sends them to a browser. This is implemented through a browser-specific browser driver, which sends commands to a browser, and retrieves results. wikipedia.org

Component Testing is a type of software testing in which usability of each individual component is tested. Along with the usability test, behavioral evaluation is also done for each individual component. wikipedia.org

Quality Assurance (QA) is a way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers.

In software engineering, software testing automated testing is that which is performed, to an extent, by a computer.

Selenium is a portable software testing framework for web applications. Selenium provides a record/playback tool for authoring tests without learning a test scripting language (Selenium IDE). wikipedia.org

Manual testing is the process of manually testing software for defects. It requires a tester to play the role of an end user, and use most of all features of the application to ensure correct behavior. wikipedia.org