A test which is administered at the end of a language course for remedial teaching is—

The correct answer is diagnostic test.

Step-by-step Explanation:

1. Understanding the Purpose of Remedial Teaching:
Remedial teaching is designed to help students who are struggling with specific learning difficulties or gaps in their knowledge. To provide effective remedial instruction, a teacher must first identify exactly where the student is facing difficulty.

2. Analyzing a Diagnostic Test:
A diagnostic test is conducted to diagnose or identify specific weakness areas, learning gaps, and misconceptions of learners at the end of a course or unit. The findings from this test help educators design targeted remedial lessons to address those precise difficulties.

3. Evaluating Other Options:

• Placement test: Used to evaluate language proficiency to place students at an appropriate course level before instruction begins.
• Achievement test: Used to evaluate how much a student has learned over a period or course, usually for grading purposes.
• Memory test: Measures a student's ability to recall facts or information, rather than identifying specific learning gaps for remediation.

Therefore, a test administered at the end of a language course specifically to plan remedial teaching is a diagnostic test.