పরీక్ష యొక్క వివిధ రకాలు మరియు స్థరాలు ఏవి?

UNIT → individual functions/methods in isolation (smallest, fastest, most numerous)
INTEGRATION → multiple units/components working TOGETHER (e.g. code + database, services)
END-TO-END (E2E) → the WHOLE application from the user's perspective (full flows,
  through the real UI/system) — broadest, slowest
SYSTEM → the complete integrated system; ACCEPTANCE → meets business requirements