Hughes Papers: Sample Questions 14 - 15 of 19

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Question number: 14

» Testing » Application

Short Answer Question▾

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What is the difference between IIR and FIR?

Explanation

  • FIR stands for Finite Impulse Response and IIR stands for Infinite Impulse Response.
  • FIR filters are non-recursive and they do not require any feedback in response, whereas in case of IIR filters they require feedback from output so, they are recursive filters.
  • FIR filters always have linear phase response while IIR filters have non-linear phase response.
  • FIR filters are always stable while IIR filters can be stable sometimes.
  • FIR filters requires less power due to lesser number of components while IIR filters require more power due to more coefficients in the design.
  • FIR filters are used for anti-aliasing; baseband and low pass filter design, whereas IIR filters are used as notch (band stop) and band pass filter design.

Question number: 15

» Database » MySQL

Short Answer Question▾

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What is difference between memory mapped I/O and input output mapped I/O?

Explanation

  • In memory mapped I/O processor and I/O devices share the same memory location (memory) while in input output I/O processor and I/O devices have different memory locations.
  • In memory mapped I/O single set of read and write instruction is used while in input output I/O different set of instruction for both read and write instruction is used.
  • Decision making is difficult in case of memory mapped I/O whereas it is easier in I/O mapped I/O.