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

Software testing is an investigation conducted to provide stakeholders with information about the quality of the product or service under test. wikipedia.org

Databases are the collection of files which are interconnected. Databases at different servers may not be of same type, i.e. databases may be heterogeneous.

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

After a test object has been delivered and entry conditions for test execution are met, the test execution phase begins. Ideally, tests should be conducted as per the defined test cases. However, the Test Manager may allow the testers to perform additional tests for interesting and new behaviors observed during testing. wikipedia.org

GitHub is a web-based hosting service for software development projects that use the Git revision control system. GitHub offers both commercial plans and free accounts for open source projects. According to the Git User's Survey in 2009, GitHub is the most popular Git hosting site. wikipedia.org

IntelliJ IDEA is a Java IDE that includes support for Java 8 and Java EE 7 and new tools for Android development.