Analog and Digital Communication | 130 MCQs with Answers | BJT, Modulation, PCM, Filters | ECE Exam Prep | VTU

This document features a thoroughly curated set of 130 multiple-choice questions with correct answers, designed to support deep understanding and efficient revision for the Analog and Digital Communication course. It spans a wide range of foundational and advanced topics, including BJT and MOSFET behavior, modulation schemes (AM, FM, PM), power and bandwidth calculations, pulse modulation techniques (PCM, DPCM, Delta Modulation, Adaptive DM), quantization noise and companding, matched filtering and ISI mitigation, sampling theory, Fourier transforms (DFT, FFT), linear and circular convolution, logic circuits, and oscillator design. The content is fully updated for the 2025/2026 academic year and is organized for rapid review with accurate answer keys. It is especially useful for: – Undergraduate students in Electronics and Communication Engineering (ECE) – Courses such as Analog and Digital Communication, Communication Systems, Digital Electronics, Signals and Systems – Students preparing for VTU semester exams, as well as competitive exams like GATE, ESE, or PSU recruitment tests Whether you're brushing up before an exam or building core knowledge in communication systems, this document serves as a high-yield resource tailored for academic success. Keywords: analog communication, digital communication, MCQs, BJT, MOSFET, amplitude modulation, frequency modulation, phase modulation, sampling theorem, Nyquist rate, PCM, delta modulation, DPCM, quantization, companding, matched filter, convolution, FFT, logic families, filters, signal processing, oscillator circuits, noise analysis, ECE, communication systems, exam preparation, VTU