1000 full-length mocks at two levels. Level 2 is harder, and its Aptitude section uses exam-style questions from your own file. Every test has four sections of 25 questions: Aptitude, Reasoning, General Studies and English. Pick a test, then choose the exam pattern and language on the next screen.
CSV (export from Google Sheets) or JSON. Columns: section, q, o1, o2, o3, o4, answer, exp. The answer is A–D or 1–4. Section is one of Aptitude, Reasoning, General Studies, English. For translations add q_hi, o1_hi … o4_hi (use the language codes in the language list: hi, bn, ta, te, mr, gu, kn, ml, pa, or, as, ur, kok, mni). In JSON use {"section","q","options":[],"answer","exp","tr":{"hi":{"q":"","o":[]}}}. A section needs at least 1 question to replace the built-in ones; 25 or more gives a full section.