To send same bit sequence, NRZ encoding require
(A) Same clock frequency as Manchester encoding
(B) Half the clock frequency as Manchester encoding
(C) Twice the clock frequency as Manchester encoding
(D) A clock frequency which depend on number of zeros and ones in the bit sequence

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  void foo(int x, int y)
  {
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  y+=x;
  }
  main()
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  }
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  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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  (B) non-key and non-ordering
  (C) key and ordering
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• What is the number of steps required to derive the string ((() ()) ())

  S → SSS → (S)S → ε

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