Electronics & Communication interview questions
500 questions with model answers, in four levels. Start with Basic, check yourself honestly, then move up.
Basic questions
- Signals & Systems (13)
- Analog Communication (13)
- Digital Communication (13)
- Information Theory & Coding (12)
- EM Theory & Transmission Lines (13)
- Antennas & Wave Propagation (12)
- Microwave Engineering (12)
- Digital Signal Processing (13)
- Wireless & Cellular (13)
- Optical Communication (12)
- Data Communication & Networking (12)
- RF Circuits (12)
Intermediate questions
- Signals & Systems (13)
- Analog Communication (13)
- Digital Communication (13)
- Information Theory & Coding (12)
- EM Theory & Transmission Lines (13)
- Antennas & Wave Propagation (12)
- Microwave Engineering (12)
- Digital Signal Processing (13)
- Wireless & Cellular (13)
- Optical Communication (12)
- Data Communication & Networking (12)
- RF Circuits (12)
Advanced questions
- Signals & Systems (10)
- Analog Communication (10)
- Digital Communication (11)
- Information Theory & Coding (11)
- EM Theory & Transmission Lines (11)
- Antennas & Wave Propagation (11)
- Microwave Engineering (10)
- Digital Signal Processing (11)
- Wireless & Cellular (12)
- Optical Communication (10)
- Data Communication & Networking (9)
- RF Circuits (9)
Tricky questions
- Signals & Systems (6)
- Analog Communication (6)
- Digital Communication (6)
- Information Theory & Coding (7)
- EM Theory & Transmission Lines (6)
- Antennas & Wave Propagation (7)
- Microwave Engineering (6)
- Digital Signal Processing (7)
- Wireless & Cellular (7)
- Optical Communication (6)
- Data Communication & Networking (6)
- RF Circuits (5)
Sample questions
- What is a signal?
- What is signal-to-noise ratio (SNR)?
- What is a prefix (instantaneous) code?
- What is a quarter-wave monopole antenna?
- What is a MAC unit in a DSP processor?
- What is the difference between step-index and graded-index fiber?
- What is the difference between Fourier series and Fourier transform?
- What is the capture effect in FM?
- What is the source coding theorem?
- What is polarization mismatch loss?
- Why must you filter before decimating?
- What is Rayleigh scattering in fiber?
- A bandpass signal occupies 20–25 MHz. What is the minimum sampling rate without aliasing?
- What is adaptive modulation and coding (AMC)?
- How much absorption loss does a shield of thickness 3δ give?
- Estimate the FIR order for 60 dB stop-band attenuation and a transition width of 0.1π rad/sample.
- What does coherent optical detection with DSP achieve?
- "Is y(t) = 2x(t) + 1 a linear system, since its graph is a straight line?"
- "In an EM wave, E and H peak at different times, like voltage and current in an inductor. True?"
- "Sampling below twice the highest frequency is always wrong. True?"