Signals and Systems - ECE - Questions and Answers
This is the electronics and communication engineering questions and answers section on " Signals and Systems " with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.
_________ is defined as any physical quantity that varies with time, space or any other independent variable
- A. Signal
- B. system
- C. signals & system
- D. none of the above
Answer: Option A
A system is represented mathematically as an operator which maps its input to its output, whereas signal is a physical quantity that varies with time, space or any other independent variable.
A discrete signal is said to be even or symmetric if x(-n) is equal to
Answer: Option A
A signal is a power signal when the signal has
- A. Infinite average power
- B. finite average power
- C. Zero average power
- D. None Of The Above
Answer: Option B
A signal is an power signal if and only if the average power of the signal is finite, for a power signal e=∞
Which of the following time system operates with a continuous time signal & produces a continuous time output signal
- A. Continuous time system
- B. Discrete time system
- C. Time invariant system
- D. Time variant system
Answer: Option A
Discrete time system operates with discrete time signal, Time-invariant system is a system whose output does not depend explicitly on time,& for continuous time system Input & output is of continuous time signal
The function which relates output of a system to the input(signal) of a system is
- A. Periodic function
- B. Non-periodic function
- C. Transfer function
- D. None of the above
Answer: Option C
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