UBT (Ubiquitous Based Test) is a testing concept that is based on the use of devices or technology that are widespread and distributed (ubiquitous). UBT is deployed in an environment that integrates a variety of smart devices, sensors, and networking technologies that enable testing to be performed anywhere and at any time, without the need for a dedicated or isolated environment.

UBT utilizes various smart devices, such as smartphones, wearables, sensors, and IoT (Internet of Things) devices, which are scattered in everyday environments. Then, testing is often automated and can be performed without direct human intervention, so it is efficient and can be run at any time.

UBT considers the user's environmental context, such as location, time of day, and activity, to customize the testing process. Furthermore, with widespread devices, testing can be carried out more easily, more frequently, and in a variety of situations, without requiring specific testing conditions or locations.

The UBT EPS-Topik is a type of Korean language exam that uses ubiquitously based technology to measure the Korean language skills of foreign workers who want to work in South Korea. EPS-TOPIK (Employment Permit System - Test of Proficiency in Korean) is an exam held by the Human Resources Development Service of Korea (HRD Korea) to assess the Korean language skills of prospective foreign workers, especially from certain countries in Asia.

UBT EPS-Topik is an innovation in testing methods, which allows participants to take the test in various places equipped with the necessary technology, without having to be tied to a special or traditional test location.

Overall, UBT EPS-Topik is a step forward in language testing that leverages technology to provide greater flexibility, accessibility, and efficiency to prospective foreign workers seeking to work in South Korea.