Concept:Diagnostic evaluation identifies a learner’s existing knowledge, strengths, and weaknesses before instruction begins, so teaching can be tailored accordingly.
Explanation:The main goal is to gather detailed information about what a student already knows and their learning characteristics.
This helps teachers plan lessons that address gaps and misconceptions.
Option (a) – “obtain information about learner's characters” – is correct because it refers to understanding learning styles, preferences, and challenges.
Option (b) – “get to know about the knowledge students already possess” – is also correct, as diagnostic tests check prior knowledge.
Option (c) “classify learners into categories” is not a primary purpose; that is more for summative or placement tests.
Option (d) “to assess the learners” is too general – assessment happens in all types of evaluation, but diagnostic evaluation specifically aims to inform instruction, not just assess.
Thus, only (a) and (b) correctly describe the purpose.
Answer:Option B: (a) and (b)