What type of selection test measures a candidate's current knowledge of a subject?

An achievement test is designed to measure a candidate's current knowledge and skills in a specific subject area. These tests assess how well an individual has learned and understood concepts within a particular field. For instance, a mathematics achievement test would evaluate a person's proficiency in math, reflecting their educational background and experiences related to that subject.

On the other hand, personality tests focus on traits and behavioral characteristics rather than knowledge, while aptitude tests are meant to assess a candidate's potential or capacity to learn and perform in certain tasks in the future rather than their current knowledge. Psychometric tests encapsulate a broad range of evaluations, including cognitive and non-cognitive assessments, which could involve aptitudes and personality traits, but they do not focus solely on current knowledge in a specific subject area. Thus, the achievement test is the correct choice for measuring up-to-date knowledge in a given topic.