ETL Testing is a process to validate the data in the source and the target system based on the business requirement. ETL is short for extract, transform, and load, three database functions that are combined into one tool to pull data out of one database and place it into another database.
LoadRunner is a commercial performance testing tool supplied by HP. It has a long and varied history resulting in its support of over 30 different interfaces, multiple languages for script creation and a promiscuous non-agent based model for monitoring systems. It is used to test applications, measuring system behavior and performance under load.
Unified Functional Testing (formerly Quick Test Professional), popularly known by its acronym UFT is an automation functional testing tool originally from Mercury Interactive which was acquired by Hewlett Packard (HP) in 2006. QTP is primarily used for functional, regression and service testing. Using QTP, you can automate user actions on a web or client based computer application.
QA stands for Quality Assurance. Software quality assurance (SQA) consists of a means of monitoring the software engineering processes and methods used to ensure quality. It is a way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers.
Selenium is an automation testing tool. Selenium is a suite of software tools used to automate web browser testing. It is an open-source tool and is mainly used for functional testing and regression testing. Selenium deploys on Windows, Linux, and macOS platforms. It is open-source software.