Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format: National Exams, 07-Elec-A5 Electronics, December 2015 — closed book, non-communicating calculator permitted, 3 hours. Answer all FIVE questions (20 marks each). In schematics ground and chassis are common; op-amps are ideal and supplies are ±15 V unless a question states otherwise.
Reference texts: A. S. Sedra & K. C. Smith, Microelectronic Circuits, 8th ed. (diode wave-shaping & limiters Ch. 4; MOSFET amplifiers Ch. 7; BJT amplifiers Ch. 6–7; op-amp applications Ch. 2).