Gray Box Testing refers to a software testing methodology that combines elements of both black box and white box testing, allowing testers to have partial knowledge of the internal workings of the application while evaluating its functionality. This skill involves designing test cases based on the understanding of the system architecture and user requirements, enabling the identification of defects in both the user interface and underlying code. Gray Box Testing is used to enhance test coverage, improve defect detection, and ensure that the software meets specified requirements by validating both functional and non-functional aspects of the application.

Micro Focus LoadRunner is a performance testing tool used to evaluate how applications behave under load conditions. It enables the user to simulate multiple concurrent users and analyze system performance metrics such as response time, throughput, and resource utilization. The tool supports scripting and execution of load tests across various application environments. It is commonly applied in performance engineering to identify and resolve system bottlenecks before deployment.

Test Automation Tools are software applications used to automate the execution of test cases in software development to improve efficiency and accuracy. These tools facilitate regression testing, functional testing, and performance testing by reducing manual effort and increasing test coverage. They are widely used in agile and DevOps environments to enhance software quality and accelerate development cycles.

Test Tools refer to software applications and frameworks designed to facilitate the testing of software products and systems. This skill encompasses the selection, implementation, and utilization of various testing tools to automate processes, manage test cases, and track defects. Knowledge of Test Tools is used to enhance the efficiency and effectiveness of the testing process, ensuring that software meets quality standards and functions as intended.

White-box testing is the process of testing a software application's internal workings and code, as opposed to simply testing its external interface and functionality. It requires specialized skills and knowledge of programming languages, algorithms, and software design principles. White-box testing is often performed by software developers or testing specialists who have expertise in the technical aspects of software development. It helps identify defects and improve the quality of the software application.