If Ram is not able to understand a certain concept in a particular subject and is continuously performing poorly in that subject, which evaluation test will have to be conducted to know the cause of his difficulties?

Diagnostic evaluation identifies the specific learning difficulties and their underlying causes when a student keeps failing in a subject.

It pinpoints exactly where understanding breaks down so remedial help can be planned.

Placement evaluation only sorts a learner into a suitable class or level before instruction begins.

Summative evaluation judges final achievement at the end of a course through terminal examinations.

Formative evaluation monitors ongoing progress during teaching to improve learning as it happens.

Diagnostic testing usually follows formative assessment once persistent weaknesses are detected.