Signal Processing MCQs January 8, 2026November 20, 2024 by u930973931_answers 15 min Score: 0 Attempted: 0/15 Subscribe 1. What is a signal in the context of signal processing? (A) A system that processes data (B) A device used for communication (C) A random noise sequence (D) A function representing physical quantities over time or space 2. Which of the following is an example of a continuous-time signal? (A) Digital audio (B) Pixel intensity values (C) Binary sequence (D) Analog voltage waveform 3. What does the term “sampling” refer to in signal processing? (A) Converting a continuous signal to a discrete one (B) Amplifying a signal (C) Filtering noise from a signal (D) Multiplying two signals 4. The Fourier Transform is used to analyze a signal in the __________ domain. (A) Time (B) Digital (C) Spatial (D) Frequency 5. Which of the following is the purpose of the Laplace Transform in signal processing? (A) To convert a time-domain signal to its frequency-domain equivalent (B) To measure signal amplitude (C) To simplify differential equations (D) To reconstruct a signal 6. What does the term “Z-transform” primarily deal with? (A) Discrete-time signals (B) Continuous signals (C) Analog filters (D) Modulation 7. What is the main function of a low-pass filter? (A) To block low-frequency components (B) To allow low-frequency components to pass (C) To amplify high-frequency components (D) To isolate noise 8. Which of the following filters is used to remove noise at specific frequencies? (A) Bandpass filter (B) Low-pass filter (C) High-pass filter (D) Notch filter 9. According to the Nyquist Theorem, the sampling frequency must be at least __________ the highest frequency of the signal to avoid aliasing. (A) Equal to (B) Twice (C) Half (D) Four times 10. What is aliasing in the context of signal processing? (A) The removal of high-frequency components (B) The amplification of noise in a signal (C) The distortion of a signal due to overlapping frequency components (D) The process of reconstructing a signal 11. Which technique is used in signal processing to compress data? (A) Convolution (B) Modulation (C) Quantization (D) Windowing 12. Which signal processing operation is defined as the integration of the product of two signals, one of which is shifted and flipped? (A) Fourier Transform (B) Convolution (C) Correlation (D) Sampling 13. The Discrete Cosine Transform (DCT) is widely used in which application? (A) Image compression (e.g., JPEG) (B) Audio processing (C) Radar signal processing (D) Radio modulation 14. In digital audio processing, which of the following techniques is used to remove noise? (A) Low-pass filtering (B) Interpolation (C) Decimation (D) Oversampling 15. What is the primary goal of signal modulation in communications? (A) To encode information for transmission (B) To increase the frequency of the signal (C) To compress data (D) To enhance noise immunity