Engineering Quantitative Aptitude English Reasoning General Knowledge Coding Others

Quiz: DSP – Basics

To View Tricks: Login Required

Number of Questions: 25

Question: 11 -

The block denoted as follows is known as __________
The block is delay block if function to block is x(n) then output from block is x(n-1)

Options:

  1. Delay block

  2. Multiplier block

  3. Advance block

  4. Adder block

    5. Answer:

    Delay block
    Solution:

    If the function to this block is x(n) then the output from the block will be x(n-1). So, the block is called as delay block or delay element.

Question: 12 -

What is the physical device that performs an operation on the signal?

Options:

  1. System

  2. None of the mentioned

  3. Medium

  4. Signal source

    5. Answer:

    System
    Solution:

    A system is a physical device which performs the operation on the signal and modifies the input signal.

Question: 13 -

If x(n)=(0,0,1,2,3,4,0,0) then x(n-2) is?

Options:

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

  2. (0,0,2,4,6,8,0,0)

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

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

    5. Answer:

    (0,0,0,0,1,2,3,4)
    Solution:

    The signal x(n) is shifted right by 2.

Question: 14 -

What are the important block(s) required to process an input analog signal to get an output analog signal?

Options:

  1. Digital signal processor

  2. ADC

  3. All of the above

  4. DAC

    5. Answer:

    All of the above
    Solution:

    The input analog signal is converted into digital using A/D converter and passed through DSP and then converted back to analog using a D/A converter.

Question: 15 -

If a signal x(t) is processed through a system to obtain the signal (x(t)2), then the system is said to be ____________

Options:

  1. Exponential

  2. None of the mentioned

  3. Non-linear

  4. Linear

    5. Answer:

    Non-linear
    Solution:

    Let the input signal be ‘t’. Then the output signal after passing through the system is y=t2 which is the equation of a parabola. So, the system is non-linear.