DELF (Diplôme d'études en langue française) is an official certification of French language proficiency for non-native speakers of French. The exam is administered by the CIEP (Centre International d'Etudes Pedagogiques) on behalf of the French Ministry of National Education.
DELF is equivalent to a French language diploma and it is valid for life.
The DELF exam tests all 4 language skills:
The total pass mark required is 50%. For each skill (test paper), the minimum pass mark is 5/25, failing which the diploma will not be awarded to the student.
The DELF exam can be taken in most countries of the world. It cannot be taken online; it has to be taken under strict examination conditions at an accredited test centre such as the Alliance Francaise or Institut Francais.