Which assessment will be given to learners during the course of instructions rather than after it is completed?

The correct option is Formative assessment.

To understand why this is the correct answer, let us break down the characteristics and timing of the different types of educational assessments:
1. Formative Assessment: This type of assessment is conducted during the course of instruction. Its primary purpose is to monitor student learning to provide ongoing feedback that can be used by instructors to improve their teaching and by students to improve their learning. Since it takes place during the instructional process, it helps identify gaps and areas that need improvement immediately.
2. Summative Assessment: Unlike formative assessment, summative assessment is evaluated after the instruction or course is completed. Its goal is to measure student learning, academic achievement, or skill acquisition at the end of an instructional unit by comparing it against some standard or benchmark (e.g., final exams or end-of-unit projects).
3. Diagnostic Assessment: This is typically conducted before instruction starts to determine students' individual strengths, weaknesses, knowledge, and skills prior to beginning instruction.
4. Placement Assessment: This is also conducted before instruction starts, focusing on placing learners in the appropriate course level, track, or group based on their existing capabilities.

Therefore, the assessment specifically designed to be administered during the course of instruction is the formative assessment.