36. For the digital circuit shown in figure, the output Q₃Q₂Q₁Q₀ = 0001 initially. After a clock pulse appear, the output Q₃Q₂Q₁Q₀ will be
    

1. 1. 0001

   
   
   

   2. 0011

   
   
   

   3. 0100

   
   
   

   4. 1100

   
   
   

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1. View Hint View Answer Discuss in Forum

   When the clock pulse arrives,
   J₀ = 0,     so Q_n+1 = Q_n
   K₀ = 0      or Q₀ will remain 1
   J₁ = K = 1      so Q₁ will become Q₁ or 1

   Correct Option: B

   When the clock pulse arrives,
   J₀ = 0,     so Q_n+1 = Q_n
   K₀ = 0      or Q₀ will remain 1
   J₁ = K = 1      so Q₁ will become Q₁ or 1

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37. The output y for the logic circuit shown in the given figure is
    
    

1. 1. AB

   
   
   

   2. A + B

   
   
   

   3. A + B

   
   
   

   4. A + B

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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38. The input pulses to the different stages of the circuits shown in the following figure must be of
    

1. 1. constant frequency and constant width

   
   
   

   2. constant frequency bit variable width

   
   
   

   3. variable frequency bit constant width

   
   
   

   4. variable frequency as well as variable width

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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39. For the gate network shown in the figure below, which of the following gate is redundant?
    

1. 1. Gate No-1

   
   
   

   2. Gate No-2

   
   
   

   3. Gate No-3

   
   
   

   4. Gate No-4

   
   
   

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1. View Hint View Answer Discuss in Forum

   Before Gate No. (2) being removed
   output, F = xyZ + wz + w = xyz + w (1 + z)
   After Gate No. 2 being removed
   output, F = xyz + w

   Correct Option: B

   Before Gate No. (2) being removed
   output, F = xyZ + wz + w = xyz + w (1 + z)
   After Gate No. 2 being removed
   output, F = xyz + w

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40. For the logic circuit shown in the figure below, the output Y is equal to
    

1. 1. ABC

   
   
   

   2. A + B + C

   
   
   

   3. AB + BC + A + C

   
   
   

   4. AB + BC

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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