31. In a JK flip– flop we have J = Q and K = 1. Assuming the flip-flop was initially cleared and then clocked for 6 pulses, the sequence at the Q, then clock for 6 pulses, the sequence at the Q output will be
    

1. 1. 010000

   
   
   

   2. 011001

   
   
   

   3. 010010

   
   
   

   4. 010101

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

32. The half adder circuit, in the given figure has inputs AB = 11. The logic level of P and Q outputs will be
    
    

1. 1. P = 0 and Q = 0

   
   
   

   2. P = 0 and Q = 1

   
   
   

   3. P = 1 and Q = 0

   
   
   

   4. P = 1 and Q = 1

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

---

33. In the logic circuit shown in the figure, output X is
    

1. 1. A B + B C + C A

   
   
   

   2. A + B + C

   
   
   

   3. AB + BC + CA

   
   
   

   4. AB + BC + CA

   
   
   

---

1. View Hint View Answer Discuss in Forum

   x = ABC + AB + AC
   = (A B + A) C + AB
   = (A + A) (B + A) C + AD
   = (A + B) C + AB
   = AC + BC + AB

   Correct Option: C

   x = ABC + AB + AC
   = (A B + A) C + AB
   = (A + A) (B + A) C + AD
   = (A + B) C + AB
   = AC + BC + AB

---

34. The circuit shown in the given figure is a/an
    

1. 1. adder

   
   
   

   2. subtractor

   
   
   

   3. parity generator

   
   
   

   4. comparator

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

---

35. Consider the circuit given below with initial state Q₀ = 1, Q₁ Q₂ = 0. The state of the circuit is given by the value 4Q₂ + 2Q₁ + Q₀. The correct state sequence of the circuit is
    

1. 1. 1, 3, 4, 6, 7, 5, 2

   
   
   

   2. 1, 2, 5, 3, 7, 6, 4

   
   
   

   3. 1, 2, 7, 3, 5, 6, 4

   
   
   

   4. 1, 6, 5, 7, 2, 3, 4

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---