Agile Testing refers to a software testing practice that follows the principles of Agile development methodologies, emphasizing iterative progress, collaboration, and flexibility. This skill involves continuous testing throughout the development lifecycle, enabling early detection of defects and ensuring that the software meets user requirements. Knowledge of Agile Testing is used to enhance product quality by integrating testing activities with development processes, facilitating rapid feedback, and adapting to changing project needs.

Certified Software Test Engineer (CSTE) is a professional certification for individuals who have a solid understanding of software testing principles and techniques. It is issued by the Quality Assurance Institute (QAI) and demonstrates that the individual has a strong understanding of software testing principles, techniques, and best practices. It is intended for those who are seeking to advance their careers in software testing and quality assurance. The certification requires passing an exam, providing a set of work experience, and agreeing to abide by the QAI's Code of Ethics.

International Software Testing Qualifications Board (ISTQB) Certified is a globally recognized certification that validates an individual's proficiency in software testing. This skill involves understanding and applying standardized testing principles, methodologies, and techniques. It includes knowledge of test design, test management, test automation, and the ability to analyze and interpret test results. ISTQB Certified professionals are adept at identifying software bugs, ensuring software quality, and mitigating risks associated with software implementation.

Mainframe Testing refers to the process of evaluating and validating the functionality, performance, and reliability of applications running on mainframe systems. This skill involves the use of various testing methodologies to ensure that mainframe applications meet specified requirements and function correctly under different conditions. Knowledge of Mainframe Testing is applied to identify defects, verify data integrity, and ensure system compatibility, thereby supporting the overall quality assurance of mainframe environments.

Software Testing Life Cycle (STLC) is a sequence of specific activities conducted during the testing process to ensure software quality. This skill involves understanding and implementing various stages of STLC, including requirement analysis, test planning, test case development, environment setup, test execution, and test cycle closure. Proficiency in STLC requires knowledge of testing methodologies, tools, and techniques, as well as the ability to document testing results and troubleshoot issues. It also involves collaboration with development teams and stakeholders to improve software quality and performance.