Engineering Quantitative Aptitude English Reasoning General Knowledge Coding Others

Quiz: DSP – Basics

To View Tricks: Login Required

Number of Questions: 25

Question: 6 -

Which of the following is common independent variable for speech signal, EEG and ECG?

Options:

  1. Time

  2. Spatial coordinates

  3. Pressure

  4. None of the mentioned

    5. Answer:

    Time
    Solution:

    Speech, EEG and ECG signals are the examples of information-bearing signals that evolve as functions of a single independent variable, namely, time.

Question: 7 -

x(t) or x(n) is defined to be an energy signal, if and only if the total energy content of the signal is a ___________

Options:

  1. None of the mentioned

  2. Infinite

  3. Zero

  4. Finite quantity

    5. Answer:

    Finite quantity
    Solution:

    The energy signal should have a total energy value that lies between 0 and infinity.

Question: 8 -

Which of the following conditions made digital signal processing more advantageous over analog signal processing?

Options:

  1. Accuracy

  2. Flexibility

  3. Storage

  4. All of the mentioned

    5. Answer:

    All of the mentioned
    Solution:

    Digital programmable system allows flexibility in reconfiguring the DSP operations by just changing the program, as the digital signal is in the form of 1 and 0’s it is more accurate and it can be stored in magnetic tapes.

Question: 9 -

Which property does y(t)=x(1-t) exhibit?

Options:

  1. Reflecting

  2. Time scaling

  3. Time shifting

  4. Time shifting and reflecting

    5. Answer:

    Time shifting and reflecting
    Solution:

    First the signal x(t) is shifted by 1 to get x(1+t) and it is reflected to get x(1-t). So, it exhibits both time shifting and reflecting properties.

Question: 10 -

If x(n)=(0,1,2,3,3,0,0,0) then x(2n) is?

Options:

  1. (0,2,4,6,6,0,0,0)

  2. (0,2,3,0,0,0,0,0)

  3. None of the mentioned

  4. (0,1,2,3,3,0,0,0)

    5. Answer:

    (0,2,3,0,0,0,0,0)
    Solution:

    Substitute n=0,1,2… in x(2n) and obtain the values from the given x(n).